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Estudo bibliom?trico sobre inveja organizacional na base de dados do Google Acad?mico entre os anos de 2011-2021
Full text linkEnvy is a feeling in which you have the desire to possess what the other has, it is an unhappy feeling in the face of the happiness of the other. In organizations this feeling is no different. This work aims to identify the development of studies on the subject of organizational envy in the Google Scholar database in the years 2011-2021. To carry out this study, a bibliometric methodology with a quantitative method and descriptive analysis was used. To select the studies, the database was searched for keywords: "organizational envy", 10 studies were found and analyzed. The results of these studies
showed that organizational envy is present in all environments where people live, in organizations this feeling is difficult to understand. Although envy is a natural feeling, in companies this feeling is used as a strategic tool. Envy can be a demotivating or motivating factor depending on how each one will treat this feeling. From this research, it can be concluded that envy is a feeling present in everyone's life and it is enough to know how to deal with it. In organizations, this feeling can often be understood as an
incentive for the work group to make the company more profitable. Managers should also seek to understand how to deal with the feeling so that conflicts do not arise in the organization and do not interfere with the functioning of the company.A inveja ? um sentimento na qual tem o desejo de possuir o que o outro tem, ? um sentimento infeliz diante da felicidade do outro. Nas organiza??es este sentimento n?o ? diferente. Este trabalho tem como objetivo identificar o desenvolvimento dos estudos sobre o tema inveja organizacional na base de dados Google Acad?mico nos anos de 2011-2021. Para a realiza??o deste estudo foi utilizada metodologia bibliom?trico com m?todo quantitativo e an?lise descritiva. Para selecionar os estudos, no banco de dados foi pesquisado por palavras-chave: "inveja organizacional", 10 estudos foram
encontrados e analisados. Os resultados destes estudos mostraram que a inveja organizacional est? presente em todos os ambientes onde se convive, nas organiza??es este sentimento ? dif?cil compreend?-la. Embora a inveja seja um sentimento natural, nas empresas esse sentimento ? utilizado como uma ferramenta estrat?gica. A inveja pode ser um fator desmotivador ou motivador dependendo de como cada um ir? tratar este sentimento. A partir desta pesquisa, pode-se concluir que a inveja ? um sentimento presente na vida de todas as pessoas e basta saber lidar com ela. Nas organiza??es, esse sentimento muitas vezes pode ser entendido como um incentivo para o grupo de trabalho
tornar a empresa mais lucrativa. Os gestores tamb?m devem buscar o entendimento de como lidar com o sentimento para que n?o surjam conflitos na organiza??o e n?o interfiram no funcionamento da empresa
Efeito de Cercospora kikuchii em sementes de soja com tratamentos biol?gicos, fitorregulador e qu?mico
Full text linkThe use of quality seeds is one of the key factors for the success of soybean (Glycine max (L.)
Merr) cultivation, although there are problems with contamination with pathogens that have
the potential to cause diseases in plants, such as purple spot. The best results in controlling
this pathogen are achieved via seed treatment. Therefore, the objective was to evaluate the
physiological quality of soybean seeds and the development of seedlings and plants using two
isolates of Trichoderma harzianum, a phytoregulator and a fungicide. The experiment was
carried out in two stages, the first consisted of a completely randomized design (DIC) with a
3x5 bifactorial arrangement, with four replications, the first factor was seeds with purple spot
symptoms, seeds without symptoms and artificially inoculated, the second factor was seed
treatments with the products Trichodermil? (Trichoderma harzianum strain ESALQ-1306),
Green Control?
(Trichoderma harzianum strain SIMBI T5), Stimulate? (Cinetina+GA3+AIB), Fungicide (Vitavax? Thiram) and control with water. The variables analyzed were: germination speed index (IVG), germination, length and dry mass of the root system and aerial part of the seedlings. The second stage consisted of evaluating the latent infection of the disease, with the factors being seed types and seed treatments the same as in the previous trial, in this case, with five replications. For this, the seeds were sown in plastic cups placed on a shelf with UV light until they reached the V2 stage, in a controlled
environment with air conditioning at 25?C. After this period, a cut was made at the neck of the plants to separate the root system and aerial part, which was placed in gerbox boxes in BOD and the aerial and root parts were dried in an oven. The variables analyzed were: observation of latent infection in the plant neck and the dry mass of the root and aerial system. The data were subjected to analysis of variance and the means were compared using the Tukey test at 5% probability using the SISVAR software. It was possible to conclude that seeds with natural symptoms of spot on the seed coat did not have any impairment in their development and stood out in relation to seeds without symptoms of the disease in the variables analyzed, on the other hand, artificially inoculated seeds were the most affected. The fungus C. kikuchii did not harm germination, except in artificially inoculated seeds.
Biocontrol with T. harzianum and the phytoregulator did not promote a significant increase in the length and dry mass of seedling and plants in relation to the control. Regarding latent infection, there was colonization of the root by T. harzianum, however, the treatments did not inhibit the development of C. kikuchii.A utiliza??o de sementes de qualidade ? um dos fatores chave para o sucesso da cultura da soja (Glycine max (L.) Merr), apesar de existirem problemas de contamina??o com pat?genos que tem potencial de causar doen?as em plantas, como a Mancha p?rpura. Os melhores resultados com o controle desse pat?geno s?o alcan?ados via tratamento de sementes. Diante disso, objetivou-se avaliar a qualidade fisiol?gica de sementes de soja e o desenvolvimento das pl?ntulas e plantas utilizando dois isolados de Trichoderma harzianum, um fitorregulador e um fungicida. O experimento foi realizado em duas etapas, a primeira consistiu em delineamento inteiramente casualizado (DIC) com arranjo bifatorial 3x5, com quatro repeti??es, o primeiro fator foram as sementes com sintomas da mancha p?rpura, sementes sem sintomas e inoculadas artificialmente, o segundo fator foram os tratamentos de sementes com os produtos Trichodermil? (Trichoderma harzianum cepa ESALQ-1306), Green Control? (Trichoderma harzianum cepa SIMBI T5), Stimulate? (Cinetina+GA3+AIB), Fungicida (Vitavax? Thiram) e testemunha com ?gua. As vari?veis analisadas foram: ?ndice de velocidade de germina??o (IVG), germina??o, comprimento e massa seca do sistema radicular e da parte a?rea das pl?ntulas. A segunda etapa consistiu na avalia??o da infec??o latente da doen?a, sendo os fatores tipos de sementes e tratamentos de sementes os mesmos que no ensaio anterior, nesse caso, com cinco repeti??es. Para isso, as sementes foram semeadas em copos pl?sticos alocados em prateleira com luz UV at? atingirem o est?gio V2, em ambiente controlado com ar-condicionado a 25?C. Ap?s esse per?odo foi realizado um corte no colo das plantas para separa??o do sistema radicular e parte a?rea, o qual foi colocado em caixas gerbox em BOD e as partes a?rea e radicular secas em estufa. As vari?veis analisadas foram: observa??o da infec??o latente no colo das plantas e a massa seca do sistema radicular e a?reo. Os dados foram submetidos ? an?lise de vari?ncia e as m?dias comparadas pelo teste de Tukey a 5% de probabilidade utilizando o software SISVAR. Foi poss?vel concluir que sementes com sintomas naturais da mancha no tegumento n?o tiveram comprometimento do seu desenvolvimento e se sobressa?ram em rela??o a sementes sem sintomas da doen?a nas vari?veis analisadas, por outro lado, sementes inoculadas artificialmente foram as mais prejudicadas. O fungo C. kikuchii n?o prejudicou a germina??o, exceto de sementes inoculadas artificialmente. O biocontrole com T. harzianum e o fitorregulador n?o promoveram aumento significativo do comprimento e massa seca de pl?ntulas e plantas em rela??o ? testemunha. Sobre a infec??o latente, houve coloniza??o dasra?zes pelo T. harzianum, por?m, os tratamentos n?o inibiram o desenvolvimento de C. kikuchii
Classifica??o de c?lulas brancas a partir de amostras de sangue usando rede neural artificial convolucional
Full text linkThe complete blood count, a microscopic exam of human blood samples, is a test commonly
used to asssess state of health, organism changes and diagnose diseases in pacients. The exam
consists of analyzing the blood components, counting and classifying the elements between red
part (red blood cells) and white part (white blood cells and platelets). The complete blood count
is performed in medical laboratories by specialized professionals, demanding a lot of time and
high cost equipment and maintenance. As an alternative, this project proposes a Deep Learning
computational model, capable of classifying white cells in blood sample images automatically.
Utilizing Convolutional Neural Network tools, the proposed model achieved 97% accuracy in
white cell classification, using a labeled public testbase. However, when applying the model
to images outside the trained pattern, the accuracy was not maintained. A web prototype was
developed to the present the classified data and where the professional can select an image to
assert the recognized data for decision making in the elaboration of a complete blood count.O hemograma completo, exame microsc?pico de amostras de sangue humano, ? um exame
muito utilizado para avaliar o estado de sa?de, altera??es no organismo e diagnosticar doen?as
em pacientes. O exame consiste em analisar os elementos que comp?em o sangue, contagem
e classifica??o da parte vermelha (gl?bulos vermelhos) e da parte branca (gl?bulos brancos e
plaquetas). Embora corriqueiro, o hemograma ? realizado em laborat?rios m?dicos por profissionais
especializados, demandando muito tempo e alto custo em equipamentos e manuten??o.
Como alternativa, este projeto prop?e um modelo computacional de Deep Learning capaz de
classificar automaticamente as c?lulas brancas em imagens de amostras de sangue. Com ferramentas
de Rede Neural Convolucional, o modelo proposto alcan?ou a precis?o de 97% na
classifica??o de c?lulas brancas, utilizando base de dados p?blica e rotulada. Por?m ao aplicar o
modelo em imagens fora do padr?o treinado, a precis?o n?o se manteve. Para a apresenta??o dos
dados de classifica??o, foi desenvolvido um prot?tipo web onde o profissional pode selecionar
uma imagem para classifica??o e visualizar os dados reconhecidos para tomada de decis?o na
elabora??o de um hemograma completo
O debate hist?rico-social nas discuss?es sobre o jogo Kingdom come: deliverance: identidades e medievalismos nos espa?os virtuais no s?culo XXI (2013-2018)
Full text linkThe goal of this work is to analyze how identities were manifested in the digital space, between the years 2013 and 2018, around the electronic game Kingdom Come: Deliverance (2018). The game in question became the center of discussion for the fact that it was advertised as a game that would seek a historical accuracy. This proposal made a portion of the public question elements that could be absent in the game, such as ethnic groups, generating discussions of a social political nature about how the nationalist ideas of its main developer, Daniel V?vra, could be present in the game. We will focus on analyzing parts of the game that allow us to reflect on how different ethnic groups were represented in the game, and how these elements propagate ethnically-based nationalist ideas, based on V?vra's ideas, manifested not only in the game, but also in his interviews and presentations. In addition to the game and its developer, we seek to discuss the political and social identities of the audience manifested in online discussions. These manifestations differ from those of V?vra due to the reach of access made possible by the internet, in which its participants discussed themes from the past, but with interests mostly towards contemporaneity. For this research, we used the concept of identity, thinking about ethnic identity, and its effect when commercialized in a product focused on a global audience. In addition to this concept, we use the concept of medievalism, and neomedievalism, to understand how the medieval was enjoyed by the players in political discussions that took place in the blogs. Our hypothesis is that the game have strong elements of a nationalist identity also manifested in V?vra's speeches, and that the public, faced with his and other mediators' positions, discussed these themes in a way that, despite the debate about the past, focus on discussions in the present.O objetivo deste trabalho ? analisar como identidades foram manifestadas no espa?o digital, entre os anos de 2013 e 2018, em torno do jogo eletr?nico Kingdom Come: Deliverance (2018). O jogo em quest?o se tornou o centro de discuss?es pelo fato de ser anunciado como um jogo que buscaria uma exatid?o hist?rica. Essa proposta fez com que uma parcela do p?blico questionasse elementos que poderiam estar ausentes no jogo, como grupos ?tnicos, gerando discuss?es, de car?ter pol?tico social, sobre como as ideias nacionalistas de seu principal desenvolvedor, Daniel V?vra, poderiam estar presentes no jogo. Focaremos em analisar trechos do jogo que nos possibilitam refletir sobre como os diferentes grupos ?tnicos foram representados no jogo, e como esses elementos propagam ideias nacionalistas, de base ?tnica, a partir das ideias de V?vra, manifestadas n?o somente no jogo, mas tamb?m em suas entrevistas e apresenta??es. Al?m do jogo e de seu desenvolvedor, procuramos discorrer sobre as identidades pol?ticas e sociais do p?blico manifestadas em discuss?es online. Essas manifesta??es se diferem das de V?vra devido ao alcance de acesso possibilitado pela internet, na qual seus participantes discutiram sobre temas do passado, por?m, com interesses majoritariamente contempor?neos. Para esta pesquisa, utilizamos o conceito de identidade, pensando na identidade ?tnica, e o efeito desta quando comercializada em um produto focado num p?blico global. Al?m desse conceito, usamos o conceito de medievalismo, e neomedievalismo, para compreender como o medievo foi usufru?do pelos jogadores em discuss?es pol?ticas ocorridas nos blogs. Nossa hip?tese ? a de que o jogo possui fortes elementos de uma identidade nacionalista tamb?m manifestada nas falas de V?vra e que o p?blico, frente ?s posi??es dele e de outros mediadores, discutiu sobre esses temas de um modo que, apesar de debater sobre o passado, foca em discuss?es que se encontravam no presente
Espirometria, funcionalidade, capacidade funcional e qualidade de vida de pacientes com covid-19 acompanhados por um servi?o de home care
Full text linkCOVID
19 Coronavirus Disease 2019 is an infectious disease caused by the
SARS CoV 2 virus Severe acute respiratory syndrome coronavirus 2), a global
pandemic. A subset of patients r ecovers from the acute phase of the disease.
However, they have prolonged symptoms of the disease. Post COVID 19 syndrome
is the presence of signs and symptoms consistent for more than 12 weeks after
infection and not attributable to alternative diagnoses. Around 30% of patients
hospitalized with COVID 19 develop Post COVID 19 Syndrome and have systemic,
respiratory, neuropsychiatric, and musculoskeletal manifestations . After ten months of
diagnosis, this study aimed to evaluate the persistent symptoms, spi rometry
examination , functionality, functional capacity, and quality of life of individuals affected
by COVID 19. Th is retrospective cohort study was carried out with patients
diagnosed with severe COVID 19 admitted to home care from January to June 2021.
Patients with a minimum age of 18 years, a medical diagnosis of COVID 19, and who
required oxygen support throughout the disease treatment were included. Patients
who needed to be transferred to the hospital without physical and psychological
conditions to perform the tests and answer the questionnaires were excluded.
Participants were assessed for the presence of persistent symptoms, spirometry
examination (FVC, FEV 1 , FVC/FEV 1 , and PEF), functionality (Post COVID 19
Functional Status Scale PCFS ), functio nal capacity (1 minute sit to stand test
TSL1 ), and quality of life (Short Form 36 Health Survey SF 36 The participants
were divided into two groups, the adult group (age between 18 and 60 years) and the
elderly group (age equal to or greater than 60 years). Statistical analyses were
performed using the SPSS Statistics for Windows program (version 26.0). The
Shapiro Wilk test was used in order to evaluate the data distribution. Numerical
variables with normal distribution were expressed as mean (stand ard deviation) and
compared using Student's t test. Numerical variables without normal distribution were
expressed as median (interquartile range) and compared by Mann Whitney and
Wilcoxon U tests. Categorical variables were expressed as a number (percenta ge)
and compared using the chi square test. Data correlations were performed using
Pearson's correlation and Spearmann's correlation. The significance level adopted
was p<0.05. A total of 22 patients were included, 12 in the adult group and 10 in the
elder ly group. The persistent symptom most commonly found among patients was
fatigue (77.2%), being significantly higher in the adult group (p=0.005), followed by
reduced exercise capacity (68.1%), memory loss (59%), difficulty concentrating
(40.9%), anxiety (4 0.9%), body pain (36.3%), cough (22.7%) and dyspnea (18.1%).
FVC was reduced in 13.6% of participants, but with no significant difference between
groups. The predicted values of FVC, FEV 1 , and PEF were lower in the elderly group
but with no significant dif ference between groups. Around 40% of patients did not
have functional limitations, 36.3% had ineligible functional limitations, and 22.7% had
mild functional limitations according to the PCFS scale, with no significant difference
between groups. The mean number of TSL1 repetitions was significantly lower in the
elderly group (p=0.024), and 86.4% of the participants were below the 25th percentile
of the predicted value. The scores of all SF 36 domains, except for physical
functioning, were lower in the adul t group but with no significant difference. In the
elderly group, a significant positive correlation was found between FVC values %
predicted and the social functioning domain (r=0.65; p=0.04). Ten months after the
diagnosis, persistent
diagnosis, persistent symptoms, symptoms, reductireduction of FVC on spirometryon of FVC on spirometry, some degree of , some degree of functional impairment, impaired functional capacity, and repercussions on the functional impairment, impaired functional capacity, and repercussions on the participants' quality of life, especially in the group of adults, are observed.participants' quality of life, especially in the group of adults, are observed.A COVID-19 (Coronavirus Disease 2019) ? uma doen?a infecciosa causada pelo v?rus SARS-CoV-2 (Severe acute respiratory syndrome coronavirus 2), que se tornou uma pandemia global. Existe um subconjunto de pacientes que se recuperam da fase aguda da doen?a, entretanto apresentam sintomas prolongados da doen?a. A Post-COVID-19 Syndrome ? definida como a presen?a de sinais e sintomas consistentes por mais de 12 semanas ap?s a infec??o e n?o atribu?veis a diagn?sticos alternativos. Em torno de 30% dos pacientes hospitalizados com COVID-19 desenvolvem Post-COVID-19 Syndrome e apresentam manifesta??es sist?micas, respirat?rias, neuropsiqui?tricas e musculoesquel?ticas. Este estudo teve como objetivo avaliar os sintomas persistentes, exame de espirometria, funcionalidade, capacidade funcional e qualidade de vida de indiv?duos acometidos pela COVID-19 ap?s 10 meses do diagn?stico. Trata-se de um estudo de coorte retrospectivo realizado com pacientes diagnosticados com COVID-19 grave internados em home care no per?odo de janeiro a junho de 2021. Foram inclu?dos pacientes com idade m?nima de 18 anos, diagn?stico m?dico de COVID-19 e que necessitaram de suporte de oxig?nio ao longo do tratamento da doen?a. Foram exclu?dos os pacientes que necessitaram de transfer?ncia para o hospital e os pacientes sem condi??es f?sicas e/ou psicol?gicas para realizar os testes e/ou responder os question?rios. Os participantes foram avaliados quanto ? presen?a de sintomas persistentes, exame de espirometria (CVF, VEF1, CVF/VEF1 e PFE), funcionalidade (Escala Post-COVID-19 Functional Status - PCFS), capacidade funcional (Teste de sentar e levantar de 1 minuto ? TSL1) e qualidade de vida (Question?rio Short Form 36 Health Survey ? SF-36). Os participantes foram divididos em dois grupos, grupo adultos (idade entre 18 e 60 anos) e grupo idosos (idade igual ou superior a 60 anos). As an?lises estat?sticas foram realizadas utilizando o programa SPSS Statistics for Windows (vers?o 26.0). Para avaliar a distribui??o dos dados foi utilizado o teste Shapiro-Wilk. As vari?veis num?ricas com distribui??o normal foram expressas em m?dia (desvio padr?o) e comparadas pelo teste T Student. As vari?veis num?ricas sem distribui??o normal foram expressas em mediana (intervalo interquartil) e comparadas pelos testes U de Mann-Whitney e Wilcoxon. As vari?veis categ?ricas foram expressas em n?mero (porcentagem) e comparadas pelo teste Qui-Quadrado. As correla??es dos dados foram realizadas pela correla??o de Pearson e pela correla??o de Spearmann. O n?vel de signific?ncia adotado foi p<0,05. Foram inclu?dos 22 pacientes, sendo 12 no grupo de adultos e 10 no grupo de idosos. O sintoma persistente mais comumente encontrado entre os pacientes foi a fadiga (77,2%), sendo significativamente maior no grupo de adultos (p=0,005); seguido de redu??o da capacidade do exerc?cio (68,1%), perda de mem?ria (59%), dificuldade de concentra??o (40,9%), ansiedade (40,9%), dor no corpo (36,3%), tosse (22,7%) e dispneia (18,1%). A CVF estava diminu?da em 13,6% dos participantes, mas sem diferen?a significativa entre os grupos. Os valores preditos de CVF, VEF1 e PFE foram menores no grupo de idosos, por?m sem diferen?a significativa entre os grupos. Em torno de 40% dos pacientes n?o apresentavam limita??es funcionais, 36,3% apresentavam limita??es funcionais ineleg?veis e 22,7% apresentavam limita??es funcionais leves pela escala PCFS, sem diferen?a significativa entre os grupos. O n?mero m?dio de repeti??es do TSL1 foi significativamente menor no grupo de idosos (p=0,024) e 86,4% dos participantes ficaram abaixo do percentil 25 do valor predito. A pontua??o de todos
os dom?nios do SF-36, com exce??o do funcionamento f?sico, foi menor no grupo de adultos, por?m sem diferen?a significativa. No grupo de idosos, foi encontrada correla??o positiva significativa entre os valores de CVF (% predito) e o dom?nio funcionamento social (r=0,65; p=0,04). Passados 10 meses do diagn?stico, observa-se a presen?a de sintomas persistentes, redu??o da CVF no exame de espirometria, algum grau de comprometimento funcional, preju?zo da capacidade funcional e repercuss?o na qualidade de vida dos participantes, sobretudo no grupo de adultos
Determina??o da umidade do solo no ponto de murcha permanente para cultura do trigo
Full text linkThe soil is responsible for storing and making water available to plants and its texture directly influences its water retention capacity. In this regard, determining the permanent wilting point (PMP) is of paramount importance, as it refers to the point at which water in the soil is so strongly retained that plants can no longer absorb it, leading them to a permanent state of withering, even when subjected to favorable
conditions. The work aimed to determine the moisture retained in six different soils at the permanent wilting point (PMP) for wheat crops, comparing the results obtained by the physiological method and the Richards chamber. The experimental design used was completely randomized (DIC), with six treatments and four replications, so the treatments encompass the six types of soils used, namely Hapludox collected in the
municipality of Cerro-Largo (1), Hapludox collected in the municipality of Caibat? (2), Hapludox collected in the municipality of Cruz Alta (3), Quartzipsamment collected in the municipality of Quara?, Hapludalf collected in the municipality of Santa Maria, and Gleysols collected in the municipality of Garruchos. The indicator crop chosen was wheat (Triticum spp.). The experiment was conducted in pots, and after the physiological PMP was detected, soil samples were collected and the gravimetric and volumetric soil moisture was determined. Soil samples were also subjected to tension of 1500 kPa using the Richards chamber method. The results were subjected to analysis of variance and the means compared using the Tukey test. The Oxisol (UM SA1) was the one with the highest humidity at the physiological permanent wilting point. Also, when comparing the methods, the Richards chamber obtained greater results compared to the physiological method in both humidity levels studied, showing that the wheat crop managed to extract water below the potential of ? 1500 kPa. A correlation was also made between the moisture retained in the soil and its texture, finding that clayey soils have greater water retention when compared to sandy soils due to their structure and high surface area.O solo ? o respons?vel por armazenar e disponibilizar a ?gua para as plantas e sua textura influencia diretamente sua capacidade de reten??o de ?gua. Quanto a isso a determina??o do o ponto de murcha permanente (PMP) ? de suma import?ncia, pois refere-se ao ponto em que a ?gua no solo est? t?o fortemente retida que as plantas n?o conseguem mais absorv?-la, levando-as a um estado permanente de murcha, mesmo que submetido a condi??es favor?veis. O trabalho objetivou determinar a umidade retida em seis diferentes solos no ponto de murcha permanente (PMP) para a cultura do trigo, comparando os resultados obtidos pelo m?todo fisiol?gico e pela c?mara de Richards. O delineamento utilizado foi o inteiramente casualizado (DIC), com seis tratamentos e quatro repeti??es, assim os tratamentos compreendem os seis tipos de solos utilizados, sendo eles Latossolo coletado no munic?pio de Cerro-Largo (1), Latossolo coletado no munic?pio de Caibat? (2), Latossolo coletado no munic?pio de Cruz Alta (3), Neossolo coletado no munic?pio de Quara?, Argissolo coletado no munic?pio de Santa Maria e Gleissolo coletado no munic?pio de Garruchos. A cultura indicadora escolhida foi o trigo (Triticum spp.). O experimento foi conduzido em vasos, e ap?s o PMP fisiol?gico ser detectado foi realizada a coleta de amostras dos solos e determinada a umidade gravim?trica e volum?trica dos solos. Amostras de solo tamb?m foram submetidas a tens?o de 1500 kPa pelo m?todo da c?mara de Richards. Os resultados foram submetidos a an?lise de vari?ncia e as m?dias comparadas pelo teste de Tukey. O Latossolo (UM SA1) foi o que apresentou maior umidade no ponto de murcha permanente fisiol?gico. Tamb?m, na compara??o dos m?todos, a c?mara de Richards obteve resultados maiores se comparado ao m?todo fisiol?gico em ambas as umidades estudadas, evidenciando que a cultura do trigo conseguiu extrair ?gua abaixo do potencial de ? 1500 kPa. Foi realizada ainda uma correla??o da umidade retida nos solos com a textura dos mesmos, constatando que solos argilosos possuem maior reten??o de ?gua quando comparados a solos arenosos devido a sua estrutura e alta ?rea superficial
Desempenho da cultura do trigo sob diferentes preparos e plantas de cobertura
Full text linkThe no-till system (NT) is a conservation management practice that aims to increase productivity and conserve the physical, chemical, and biological characteristics of the soil. On the other hand, the conventional tillage system (CT) is characterized by intensive soil use, which turns over the upper layers, generating compaction and susceptibility to erosion. Wheat crops can be affected by the management and use of the soil, especially when grown in autumn fallow areas. The present study aimed to evaluate the impact of different cover crop species on soil physical attributes and wheat dry matter production in areas under no-till and scarification in a Oxisol (Ferralsols) in the Missions region of Rio Grande do Sul. The experimental design was a randomized block design, with four blocks and six treatments: PO - fallow; NF - forage turnip; CE - rye; AP - black oats; TB - white lupine; MI - species mix. The treatments were subdivided into scarified (SC) and no-till (NT) system. SC reduced soil density and compaction degree, also providing an increase in macropores. Forage turnip represented the highest dry biomass production and concentration of C, P, K, Ca, Mg, S, B, and Zn. Fallow represented inferior conditions in dry biomass and nutrient production. Wheat dry matter was not affected by the treatments.O sistema plantio direto (SPD) ? uma forma de manejo conservacionista que visa aumentar a produtividade e conservar as caracter?sticas f?sicas, qu?micas e biol?gicas do solo. Por outro lado, o sistema de plantio convencional (SPC) se caracteriza pelo uso intensivo do solo, que revolve as camadas mais superficiais, gerando a compacta??o e a suscetibilidade ? eros?o. A cultura do trigo pode sofrer interfer?ncia do manejo do manejo e uso do solo, principalmente quando ? cultivado em ?reas de pousio outonal. O presente trabalho busca avaliar o impacto de diferentes esp?cies de plantas de cobertura nos atributos f?sicos do solo e na produ??o de massa seca do trigo em ?reas sob plantio direto e escarifica??o em um Latossolo Vermelho na regi?o das Miss?es do Rio Grande do Sul. O delineamento utilizado foi blocos ao acaso, sendo quatro blocos e seis tratamentos: PO ? pousio; NF ? nabo-forrageiro; CE ? centeio; AP ? aveia-preta; TB ? tremo?o-branco; MI ? mix de esp?cies. Subdivididos em escarificado (ESC) e plantio direto (PD). A ESC reduziu a densidade do solo e o grau de compacta??o, proporcionando tamb?m o aumento dos macroporos. O nabo-forrageiro representou a maior produ??o de biomassa seca e concentra??o de C, P, K, Ca, Mg, S, B e Zn. J? o pousio representou condi??es inferiores na produ??o de biomassa seca e nutrientes. A massa seca do trigo n?o sofreu interfer?ncia dos tratamentos
Reten??o e disponibilidade de ?gua em diferentes solos do Rio Grande do Sul
Full text linkSoil is a great water store for plants, and controls important stages of the hydrological cycle. The soil?s ability to retain and store water depends on the texture, structure and depth of the soil, The objective of this experiment was to determine the water retention curve (CRA) for different RS soils with different textural classes, calculate the amount of total water stored and ranges of water available for the surface horizon, determine the field capacity, as well as carry out the comparison of real results of the methodologies adopted by ZARC. The experiment was developed in laboratory 102 of pedology and soil physics at UFFS campus Cerro largo- RS. Samples of the A horizon of 12 soils from RS were used. The soils were air-dried, macerated and sieved through a 2 mm mesh. Particle size analysis was carried out with these samples using the pipette method. To carry out the CRA soil samples were placed in rings of 100 cm? in volume and saturated with water. 4 repetitions were made for each soil. After saturation, the samples were subjected to stresses of 6 and -33, -100, -500, - 100 and -1500 kPa in the Richards chamber. Using CRA data, soil water availability ranges soil density and porosity, and soil density and porosity were calculated. Pearson correlation analyzes were also carried out between water retention and other physical properties of the soil. The data obtained were subjected to analysis of variance and the means compared using the Scott Knott test at 5 % significance. The measured water retention date was also compared with the data estimated by the methodology currently used by ZARC. Only two mapping units obtained the same results as AD measured in the laboratory and AD estimated as predicted by Zarc, in the other mapping units a significant difference was obtained. Agricultural zoning does not take into account soil density total porosity, macro and microporosity, and these influence wter retention in the soil. The Zarc AD method needs to be improved, as AD in the soil is not a consequence only of the granulometric composition.O solo ? um grande armazenador de ?gua para as plantas, e controla importantes etapas do ciclo hidrol?gico. A capacidade do solo de reter e armazenar ?gua depende da textura, estrutura e profundidade do solo. O objetivo deste experimento foi determinar a curva de reten??o de ?gua (CRA) para diferentes solos do RS com diferentes classes texturais, calcular a quantidade de ?gua total armazenada e faixas de ?gua dispon?vel para o horizonte superficial, determinar a capacidade de campo, bem como realizar a compara??o dos valores de ?gua real com os resultados das metodologias adotadas pelo ZARC.O experimento foi desenvolvido no laborat?rio 102 de Pedologia e f?sica do solo da UFFS, Campus Cerro Largo - RS. Foram utilizados amostras do horizonte A de 12 solo do RS. Os solos foram secos ao ar, macerados e peneirados em malha de 2 mm. Com essas amostras foi realizada a an?lise granulom?trica, pelo m?todo da pipeta. Para fazer a CRA, amostras de solo foram colocadas em an?is de 100 cm? de volume e saturadas com ?gua. Foram feitas 4 repeti??es para cada solo. Ap?s a satura??o, as amostras submetidas as tens?es de 6 e 10 kPa na mesa de tens?o e -33, -100, -500, -1000 e -1500 kPa na C?mara de Richards. Com os dados da CRA, foram calculadas as faixas de disponibilidade de ?gua no solo, a densidade e porosidade do solo. Tamb?m foram feitas an?lises de correla??o de Pearson entre a reten??o de ?gua e as demais propriedades f?sicas do solo. Os dados obtidos foram submetidos ? an?lise de vari?ncia e as m?dias comparadas pelo teste de Scott knott a 5% de signific?ncia. Os dados de reten??o de ?gua medidos tamb?m foram comparados com os dados estimados pela metodologia usada atualmente pelo ZARC. Apenas duas unidades de mapeamento obtiveram resultados iguais de ?gua Dispon?vel (AD), medida em laborat?rio e de AD estimada conforme prev? o Zarc, nas demais unidades de mapeamento obteve-se uma diferen?a significativa. O zoneamento agr?cola n?o leva em considera??o a densidade do solo, porosidade total, macro e microporosidade, e estes influenciam na reten??o de ?gua no solo.O m?todo de AD do Zarc necessita ser aperfei?oado, pois a AD no solo n?o ? consequ?ncia somente da composi??o granulom?trica
Influ?ncia do cultivo em excesso de cobre sobre o perfil dos metab?litos secund?rios de Tridax procumbens L.
No full textThe low concentration of bioactive compounds in plants is one of the biggest obstacles to their economic exploitation. Thus, studies have proposed that metallic ions, such as copper or zinc, can act as abiotic elicitors, directly influencing the production of bioactive substances. Tridax procumbens L. is a plant that has several medicinal properties, mainly attributed to a wide range of bioactive compounds present in its leaves. Therefore, the present research sought to evaluate the effect of stress caused by excess copper in a hydroponic system on the metabolite profile of T. procumbens leaves. The experiment was set up in a controlled environment. T. procumbens seedlings were obtained from viable cypselae collected from matrices surrounding the experimental area of the UFFS, Campus Cerro Largo. They were subsequently acclimatized and exposed to different concentrations of copper in the form of CuSO4.5H2O, with the treatments being: T0=0.235 (control); T1=12.5; T2=25; T3=50 and T4=100 ?mol L-1, using a randomized experimental design (DIC), five treatments and four replications, totaling 20 experimental units, each unit consisting of 5 plants per container. After 36 days of cultivation, the plants were collected and the leaves corresponding to each treatment were subjected to hydroalcoholic removal (70% ethanol), in triplicate. The crude extracts were solubilized in MeOH-H2O and subjected to phytochemical analysis. An analysis of bioactive compounds in the leaves was performed by HPLC-DAD and ESI-MS, revealing a wide range of strategies adopted by T. procumbens in response to copper stress. Several alkaloids, phenolic compounds, sterols and triterpenoids were identified, demonstrating the plant's metabolic plasticity. It is noteworthy that a higher dose (100 ?mol L-1) significantly increased the concentration of voacangine, the most predominant compound in the analyses. The study also demonstrated that 66.7% of the compounds that expressed increased concentrations in relation to the control treatment were representatives of phenolic compounds, reducing the participation of this group in increasing tolerance to the stressful cultivation environment. Furthermore, it was also possible to observe that the treatments of 12.5 and 25 ?mol L-1 of copper were the doses with the highest biosynthesis of sterols and triterpenoids quantified in this study. From these observations it is possible to see that T. procumbens activated different pathways and strategies to survive and grow in the stressful environment, contaminated with copper.A baixa concentra??o de compostos bioativos em plantas est? entre um dos maiores obst?culos para a sua explora??o econ?mica. Assim, estudos v?m propondo que ?ons met?licos, como o cobre ou zinco, podem atuar como eliciadores abi?ticos, influenciando de forma direta na produ??o de subst?ncias bioativas. A Tridax procumbens L., ? uma planta que apresenta v?rias propriedades medicinais, atribu?das principalmente ? grande diversidade de compostos bioativos presentes em suas folhas. Diante disso, buscou-se avaliar o efeito do estresse causado por excesso de cobre em um sistema hidrop?nico, sobre o perfil de metab?litos de folhas de T. procumbens. A instala??o do experimento foi realizada em ambiente controlado. As mudas de T. procumbens foram obtidas a partir de cipselas vi?veis coletadas de matrizes dos arredores da ?rea experimental da UFFS, Campus Cerro Largo. Posteriormente, foram aclimatadas e expostas ?s diferentes concentra??es de cobre na forma de CuSO4.5H2O, sendo os tratamentos: T0=0,235 (controle); T1=12,5; T2=25; T3=50 e T4=100 ?mol L-1, dispostos em delineamento experimental inteiramente casualizado (DIC), cinco tratamentos e quatro repeti??es, totalizando 20 unidades experimentais, cada unidade consistindo em 5 plantas por recipiente. Ap?s 36 dias de cultivo as plantas foram coletadas e as folhas referentes a cada tratamento, foram submetidas a extra??o hidroalco?lica (etanol 70%), em triplicata. Os extratos brutos foram solubilizados em MeOH-H2O, e submetidos a an?lises fitoqu?micas. A an?lise dos compostos bioativos nas folhas foi realizada por HPLC-DAD e ESI-MS, revelando uma ampla gama de estrat?gias adotadas pela T. procumbens em resposta ao estresse de cobre. Diversos alcaloides, compostos fen?licos ester?is e triterpenoides foram identificados, evidenciando a plasticidade metab?lica da planta. Ressalta-se que a maior dose (100 ?mol L-1) aumentou significativamente a concentra??o da voacangina, o composto de maior predomin?ncia nas an?lises. O estudo tamb?m demonstrou que 66,7 % dos compostos que expressaram aumento das concentra??es em rela??o ao tratamento controle foram representantes dos compostos fen?licos, indicando a participa??o deste grupo no aumento da toler?ncia com o ambiente de cultivo estressor. Al?m disso, tamb?m foi poss?vel observar que os tratamentos de 12,5 e 25 ?mol L-1 de cobre foram as doses de maior bioss?ntese dos ester?is e triterpenoides quantificados neste estudo. A partir destas observa??es ? poss?vel perceber que a T. procumbens ativou diferentes vias e estrat?gias para sobreviver e crescer no ambiente estressor, contaminado com cobre
Agrega??o do solo em diferentes sistemas de manejo para produ??o de hortali?as
Full text linkIn the conventional vegetable production system, soil structure, especially aggregation, can be affected by soil turning, degrading organic matter. As an alternative, it would be possible to use a different management system, such as a notillage system for vegetables, with the aim of increasing the use of vegetation cover and reducing tillage. The objective of the present work is to evaluate the soil
aggregation in the layers 0-10 and 10-20 cm in the lettuce crop, after 5 years of different soil management for vegetable production. The work was carried out in the experimental area of UFFS, campus Cerro Largo-RS, where the experiment was installed in 2018 with the following treatments: conventional system without covering (SCsC), conventional system with covering (SCC), no-tillage without covering (PDsC ) and vegetable no-tillage system (SPDH). The experimental design used is
randomized blocks, with five replications. The results were subjected to analysis of variance and Tukey's test at 5% probability. The methodology was followed according to the standard wet method and for the visual evaluation the DRES method was followed. There was a significant difference in the visual evaluation of the first layer, where no-tillage without cover stood out from the others, in the second layer there was no significant difference. In the evaluations of Weighted Average Diameter and
Geometric Average Diameter, there was no significant difference between managements. There was also no significant difference between the classes of aggregates.No sistema convencional de produ??o de hortali?as a estrutura do solo, principalmente a agrega??o pode ser afetada pelo revolvimento do solo, degradando a mat?ria org?nica. Como alternativa seria poss?vel usar um diferente sistema de manejo, como sistema de plantio direto de hortali?as, com o objetivo maior uso de cobertura vegetal e de diminuir o revolvimento. O objetivo do presente trabalho ?
avaliar a agrega??o do solo nas camadas 00-10 e 10-20 cm na cultura da alface, ap?s 5 anos de diferentes manejos do solo para produ??o de hortali?as. O trabalho foi desenvolvido na ?rea experimental da UFFS, campus Cerro Largo-RS, onde o experimento foi instalado em 2018 com os seguintes tratamentos: sistema convencional sem cobertura (SCsC), sistema convencional com cobertura (SCC), plantio direto sem cobertura (PDsC) e sistema de plantio direto de hortali?as(SPDH).
O delineamento experimental utilizado ? de blocos ao acaso, com cinco repeti??es. Os resultados foram submetidos a an?lise de vari?ncia e ao teste de Tukey, a 5% de probabilidade. A metodologia foi seguindo de acordo com o M?todo padr?o da via ?mida e para a avalia??o visual foi seguido o m?todo DRES. Houve diferen?a significativa na avalia??o visual da primeira camada, onde o plantio direto sem
cobertura se sobressaiu aos demais, na segunda camada n?o houve diferen?a significativa. Nas avalia??es de Di?metro M?dio Ponderado e Di?metro M?dio Geom?trico n?o tiveram nenhuma diferen?a significativa entres os manejos. Tamb?m n?o houve diferen?a significativa entre as classes de agregados