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Intertemporal consumption and lifecycle in a pandemic context: an experimental approximation
Full text linkThe Covid-19 pandemic generated uncertainty among consumers, a slowdown in consumption and an increase of the added saving at world level, the microeconomic evidence showed a tendency towards dissaving and growing consumption. These variations activate questioning about the consequences of confinement in intertemporal consumption, at the same time they allow to provide new empirical evidence about life-cycle models in their standard or neoclassical and behavioral versions. The purpose of this work was to experimentally evaluate the intertemporal consumption patterns from the postulates of both life cycle models. To this end, an experimental simulation exercise of online purchases of commodities was carried out with the participation of 210 consumers who were subjected to treatments that included a baseline, income increase scenarios and no-income withdrawal scenarios. The results verified the existence of consistent responses with the behavioral model in 85% of the cases and with the standard model for the remaining 15%; that is, the tendencies to smooth consumption and increase savings were in the minority in the group evaluated and the confinement context did not translate into more self-controlled intertemporal consumption behaviors
A cultura intraempreendedora e sua influência na inovação e na vantagem competitiva
Full text linkA implementação do Intraempreendedorismo nas organizações tem contribuído para que estas respondam
prontamente às mudanças de mercado, garantindo a
sobrevivência e o progresso das mesmas. Nessa perspectiva, a
presente pesquisa analisa a magnitude da influência de
experiências intraempreendedoras na Vantagem Competitiva
(VC) e na Inovação (IN) e vice-versa, mediante a aplicação de Mínimos Quadrados Parciais-Modelagem de Equações de Estruturais (PSL-SEM). Este método é composto por duas fases: a verificação do modelo de mensuração, em que foram validadas as relações entre constructos e as variáveis observáveis; e a investigação do modelo estrutural, por meio da avaliação das relações entre os constructos. Os resultados demonstram que Intraempreendedorismo possui magnitude de influência sobre IN da ordem de 0,609 e sobre a VC na ordem de 0,184. Por outro lado, a IN exerce influência sobre a VC da ordem de 0,409, confirmando os principais pressupostos levantados na literatura pesquisada
The effect of Bacillus spp. and vermicompost on the growth of cherry tomato, Solanum lycopersicum L., fruits
Full text linkIn this investigation, we evaluate the effect of Bacillus spp. and vermicompost on the growth of cherry tomato, Solanum lycopersicum L., fruits. We used four treatments: T1. Vermicompost (112 g). T2. Vermicompost (112 g) in combination with the consortium of bacteria of the genus Bacillus (B. subtilis, B. thuringiensis var. kurstaki, B. pumilus, and B. amyloliquefaciens) at a concentration of 1x108 colony forming units (CFU)/mL and in a dosasge of 3 mL/L of water. T3. The consortium of bacteria of the genus Bacillus at the concentration and dose mentioned and, T4. Control (untreated soil). Our experimental design was in the completely randomized design with three replications. We used the tomato fruit's weight, horizontal diameter, and vertical diameter as variable responses. Significant differences between treatments were assessed with one-way analysis of variance (ANOVA) and classified with Tukey's honestly significant difference (HSD) test. The assumptions of normality, homogeneity of variations, and data independence were verified. The Wilcoxon test was used to assess differences in the chemical composition of the fruits of each treatment. The results showed that the highest values of average fruit weight, 15.21 g and 12.99 g, were statistically equivalent obtained with T2 and T3; correspondingly compared to 11.86 g obtained in the control. There were no statistical differences between treatments in the vertical and horizontal diameter. It is concluded that the application of vermicompost in combination with the Bacillus consortium (T2); or individually (T3), significantly increases fruit weight and improves the nutritional value (N, P, K, Ca, S, Mg, Fe, Mn, Cu, Zn, B, and Na)
Use of silicate amendments on improvement of the quality and nutrition of the potato crop, variety 'Diacol Capiro'
Full text linkPotato (Solanum tuberosum L.) is one of the most important agricultural products in cold-climate areas of the world. However, the soils intended for potato production in tropical zones such as Colombia have low availability of essential elements, such as phosphorus, calcium, magnesium, and beneficial elements such as silicon. The general objective was to evaluate the application of increasing doses of three silicate amendments on the dynamics of accumulation of phosphorus, calcium, magnesium, and silicon in leaf tissue and their influence on the quality and production of 'Diacol Capiro' potato tubers under the conditions of Soracá municipality, Boyacá, Colombia. Two production cycles were evaluated, with a completely randomized design and ten treatments in each cycle. It was observed that the application of double calcium and magnesium silicate at a dose of 900 kg ha-1 as a crop management practice resulted in an increase in the accumulation of macronutrients such as P, Ca, and Mg by 63.1, 32.4, and 51.1%, respectively, and a 100% increase in silicon accumulation as a beneficial element; this was reflected in a 46% increase in total yield, with a higher production of first-quality tubers and a significant increase in dry matter and specific gravity compared to the application of conventional fertilization sources. Therefore, silicate fertilizers are an important alternative to improve quality and production through a better dynamic of accumulation of essential and beneficial nutrients in potato-producing areas in Colombia
Edaphic macrofauna in the establishment of an agroforestry system in the High Andean region of Southern Colombia
Full text linkBiological degradation of the soil due to inadequate agricultural practices that eliminate vegetative cover and, therefore, organic matter reduces the biological communities that perform important ecological functions in the soil. The objective of the study was to evaluate some biological properties of the soil in an agroforestry system with Morella pubescens intercropped with Smallanthus sonchifolius and in a degraded pasture of Cenchrus clandestinum. The trial was conducted at the Botana Experimental Farm, Nariño, at 2,820 meters above sea level. Density, richness, and Simpson and Shannon-Wiener diversity indices were determined. A Randomized Complete Block Design with three replications was used. The treatments corresponded to sowing distances of S. sonchifolius. T1: sown at 1x1m, T2: 0.8x0.8m, T3: 0.5x0.5m, and the control T4 corresponded to degraded pasture of C. clandestinum. The tree component M. pubescens was established at 4x4m between seedlings and 9m between rows. Soil macrofauna sampling was carried out following the monolithic TSBF method, collecting at depths of (0-10, 10-20 and 20-30cm). A total density of 6,496i/m2 individuals was found. The highest value was obtained in T3 (3,168i/m2), represented by the taxonomic groups Diptera and Haplotaxida. Higher values of richness were observed in T1. The Shannon index was higher in T2 (0.66), while T1 (0.80) presented higher dominance in morphospecies. Density and richness were higher in the agroforestry arrangement than in the degraded Cenchrus clandestinum pasture. Treatments, depth, and their interaction did not significantly affect morphospecies diversity
Calidad de vida relacionada con la salud y los estados de ánimo en estudiantes de instituciones educativas de Antioquia, Colombia
Full text linkIntroducción: La calidad de vida relacionada con la salud (CVRS) y los estados de ánimo son indicadores cruciales del bienestar en adolescentes, pero su relación con estudiantes de Antioquia, Colombia, no ha sido ampliamente estudiada. Objetivo: Determinar la CVRS y los estados de ánimo en escolares de Antioquia-Colombia. Materiales y métodos: Estudio transversal con 1957 escolares de 9 a 20 años. Se aplicaron mediciones de CVRS, ansiedad, depresión, hostilidad y alegría, actividad física, comportamiento sedentario, apoyo social de padres y nivel socioeconómico. Resultados: La calidad de vida alta (CVA) es más elevada en hombres, personas con alegría, estudiantes con apoyo de padres, activos físicamente y personas de nivel socioeconómico alto y medio. AL aumentar un año de edad, disminuye en un 15 % la CVA, y al aumentar la depresión, la ansiedad y el comportamiento sedentario disminuye la CVA. Además, los niveles de depresión y ansiedad son mayores en mujeres, estudiantes mayores, sin apoyo de los padres y personas sedentarias. Conclusiones: La CVRS se asocia con estados de ánimo, actividad física, comportamiento sedentario y apoyo de los padres; mientras que los estados de ánimo se asocian con el sexo, el apoyo de los padres, la CVS y el sedentarismo
