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Polyethylene mulching effects on soil properties and physiological traits in tomato under ecological crop technology
No full textThe aim of this study is to assess the influence of covering with black polyethylene mulch on soil properties and also over plant physiological behavior. Analyzed gas-exchange parameters were: soil net CO2 exchange rate (NCER), soil respiration (Ce) and water humidity (W flux) as soil indicators and photosynthetic rate, transpiration, and stomatal
conductance and also sugars leaf content as plant physiological indicators.Plant material was Prekos tomato variety cultivated in protected organic system at The Vegetable research and Development Station Bacau (SCDL Bacău). Our analysis showed that black plastic mulch on the soil surface favored soil compaction especially on the space between tomato plant rows. The strong soil compactness state was reflected by the high bulk density values and other indicators as smooth soil surface and the cracks networks. In variant with no black plastic cover, soil gas-exchange showed that net CO2 exchange rate of was 7.94 µmol m-2 s -1 and soil CO2 flux as soil respiration was 77.4 µmol m-2 s
-1 both higher in comparison with black polyethylene covering variant. In variant with black plastic cover because of higher soil moisture under polyethylene the water flux between air and soil are increased. Photosynthesis registered a slight increase, having the value of 10 µmol m-2 s -1 in flowering phenophase (June) and about 11 µmol m-2 s -1 in ripening phenophase (July) in uncovered with polyethylene variant. During the studied period, the variant uncovered with black plastic (polyethylene) registered a small variation of the photosynthesis rate but a higher mean value than covered variant. Covered variant registered a higher value in the flowering phenophase and a smaller value in ripening stage
Study regarding the use of mulberry leaves by Bombyx Mori - Băneasa super hybrid
No full textIn order to assess how efficient is the use of Mulberry leaf by the Bombyx mori Băneasa Super larvae hybrid, some determinations were made regarding the nutritional value and digestibility of the worm leaf administered as food (leaves from a Japanese variety, Kokuso 21), during a series of summer growth. The results showed that ongoing vegetation and growth process of this hybrid, the Mulberry leaves suffer an aging phenomenon, revealed by diminishing its chemical composition quality. According to this, most of the nutritional substances from Mulberry leaves, except cellulose, manifest a continuous decline during the growth period. The digestibility of these nutritional components registered a value of 53.77%, the raw energy value was 4216 kcal/kg dry substance, the digestive energy was 2112 kcal/kg (DS), while the metabolic energy was 1946-1966 kcal/kg (DS). The efficiency of converting ingestion into silk had a value of 10.24% and the digestion was 19.04%
Clinical Biochemistry of Cushing Syndrome in Dogs
No full textThe aim of the study is to determine clinical and paraclinical elements useful in the diagnosis of hyperadrenocorticism, given that the symptoms are varied and often similar to dermatitis or liver disease. Clinical signs in dogs with hyperadrenocorticism were especially of dermatological nature (bilateral alopecia, thin skin along with elastosis and hyperpigmentation, calcinosis cutis and muscle weakness and abdominal enlargement - „potbelly”), accompanied by polyuria and polydipsia. Blood tests performed on 14 dogs of different breed, age and gender revealed moderate hyperglycemia (143.4±3.3 mg/dl), hypercholesterolemia (332±2.9 mg/dl), increased serum alkaline phosphatase (378±3.8 UI/L), alanine aminotransferase (ALT=93.26±2.6 UI/L), aspartate aminotransferase (AST=89.72±2.3 UI/L) and abnormal plasma cortisol (50±3.5 ng/dl). Thorough ultrasonography revealed hypertrophy of the adrenal glands (2.92x1.43 cm). The histopathologic lesions include active metabolic cells (big, rich colored and strong-cored), containing lipid structures (steroids’ precursors) and metabolic inactive cells (small, dark colored, pyknotic cored or rich in heterochromatin). Hyperglycemia, polyuria / polydipsia or elevated serum alkaline phosphatase without a significant increase in serum transaminases (AST and ALT) raises suspicion of Cushing's syndrome. If these biochemical diagnostic elements evolve along with dermatological signs (bilateral alopecia, hyperpigmentation, muscle weakness), the diagnosis of Cushing's syndrome is more likely
The green mass and silage quality of reed canary grass, Phalaris arundinacea under the conditions of Moldova
No full textReed canary grass Phalaris arundinacea is a cool-season, long-lived with good frost and drought tolerance, highyielding C3 grass species. The objective of this research was to evaluate the quality of green mass and prepared silage
from reed canary grass, Phalaris arundinacea, cv. Premier grown under the conditions of the Republic of Moldova. In
the third growing season, reed canary grass was characterized by high growth rate and regenerative capacity after being
cut. Results revealed that harvested green mass first cut content 25.6% dry matter, but green mass second cut - 38.7%
dry matter. The dry matter of the whole plant contained 109-139 g/kg CP, 74-98 g/kg ash, 368-411g/kg ADF, 616-685
g/kg NDF, 36-38 g/kg ADL, 330-375g/kg Cel and 248-274 g/kg HC. The nutritive value of natural fodder: 56.9-60.2%
digestible dry matter, 11.32-11.91 MJ/kg digestible energy, 9.29-9.78 MJ/kg metabolizable energy and 5.31-5.79 MJ/kg
net energy for lactation. The prepared silages were characterized by agreeable colour with pleasant smell and pH 3.98 -
4.10, it contained 30.8- 43.9 g/kg DM lactic acid, 5.8-7.2 g/kg DM acetic acid, 900-902 g/kg organic matter, 127-129
g/kg CP, 411-427 g/kg ADF, 683-704 g/kg NDF, 27-28 g/kg ADL with nutritive value: 55.6-56.9% dry matter
digestibility, 11.09-11.32 MJ/kg digestible energy, 9.11-9.28 MJ/kg metabolizable energy and 5.07- 5.31 MJ/kg net
energy for lactation. We found that the Phalaris arundinacea substrates for anaerobic digestion, have optimal C/N ratio,
amount of lignin and hemicellulose. It has been established that the biomethane potential of the Phalaris arundinacea
substrates varied from 335 to 362 l/kg ODM. Reed canary grass Phalaris arundinacea cv. Premier have good nutrient
content, can be used as as natural fodder and silage for husbandry animals, also and feedstock for anaerobic digestion in
biogas reactors and renewable energy production
Taxation: is flat rate better than progressive rate?
No full textOur research aims to analyze the evolution in time and space of taxation rates and the impact of legislative changes on
the microeconomic and macroeconomic environments, as well as the impact of legislative changes, the analysis of
different models of tax systems based on the flat tax rate, used in Romania, or progressive tax rates, preferred in
countries like France, Belgium and Luxembourg. Attempts at comparing personal income taxes are relatively rare and
difficult to achieve precisely because of the tax legislation that is significantly different from one country to another in
terms of tax base, tax rates or method of calculation of the various taxes and fees. Identifying the best taxation approach
is the main goal of our paper. Our research is aimed at identifying the best taxation system, at determining the
correlation between tax burden and tax income, thus analyzing the distributive effects of flat rates or progressive rates,
and the effects of preferring one to the other, in other words determining whether they encouraged the formation of a
middle class or on the contrary, they have deepened the inequity among the population, the effects that these systems
have had on the social, economic and political environments in Romania and in the French-speaking countries included
in our research: France, Belgium and Luxembourg
Folosirea speciilor pomicole in designul peisager periurban
No full textPresent study sets out anew way of developing the green spaces, centered on the citizen, wishing to become a way for cities to cope with climate change, food and nutritional security, biodiversity management and prosperity.Our purpose was to find and implement a tool for the sustainable recovery of degraded lands, by using landscaping that includes periurban spaces dedicated to the development of agro-horticultural sector.The study was conducted between 2016-2019 and represents a multidisciplinary approach, which took into consideration as many aspects as environment, economic, social, horticultural and biological.Horticultural part of this study is characterized by a great biodiversity and is dominated by fruit growing species. As for the degraded area in which urban orchards are located, they could be the hope of having safe spaces, of improving the landscape, as well as another form of social inclusion. The most important benefits from a social point of view are the maintenance of public spaces at a low cost, the social inclusion, the economy of saving food and the short chain, while under the environmental aspect, the protection of biodiversity and the safety of health become important
Observations regarding the entomofauna of coleopteras within some agricultural crops from the North-East part of Portugal
No full textThe aim of this research was that to identify the entomofauna of Carabidae existing within the agricultural crop taken
into the study: vineyard groove by the mean of soil traps. Each 5 traps were mounted inside 3 subplots, namely:
leguminosae+graminias, leguminosae and natural. The area of work was about 1.30 ha, each subplot having a surface of
4.000 m2. The researches were carried out within Quinta da Granja farm which is located very close to Alijo city, at two
dates: May 18th and May 22nd of 2017. To prevent the maceration of insects, a solution consisting of water and formalin
was added inside each trap. After carrying out the experiments within the field, the insects were brought in the
Laboratory of Entomology in order to be counted and identified. From the Coleoptera order, species with the biggest
number of samples were: -within the leguminosae+graminias subplot: Carabidae family (92), Scarabaeidae (45),
Staphylinidae (25) and Dermestidae (12). From the Carabidae family, species with the biggest number of samples
were: Harpalus tardus-33 and Carabus violaceus-12 (for the date of May 18th); Carabus violaceus-24 (for May 22nd); -
within the leguminosae subplot: Carabidae (154), Staphylinidae (101) and Scarabaeidae (71) and Cerambycidae (32)
and Chrysomelidae (27) and Dermestidae (19). From the Carabidae family, species with the biggest number of samples
were: Pterostichus vernalis-63 and Poecilus versicolor-32 (for May 18th); Pterostichus cupreus-26 (for May 22nd); -
within the natural sublot: Carabidae (128),Chrysomelidae (72) and Scarabaeidae (54) and Dermestidae (22). From the
Carabidae family, species with the biggest number of samples were: Brachimus crepitans-24 (for May 18th);
Anisodactylus binotatus- 48 (for May 22
nd)
Northeast Romania water resources management in the context of climate change issue - Iaşi County case study
Get PDFAfter 1980, drought became a cyclic phenomenon that has spread over subtropics and mid-latitudes ecosystems and society. Agriculture and domestic or industrial water supply are the fields that received the most severe damage. Climate change in terms of water supply was expressed through UNESCO 1979 Aridity Index, which identified critical areas and periods affected by drought in north-eastern Romania. The most vulnerable areas, where the annual rainfall amount is usually less than 500 mm/year, are the most prone to severe droughts. However, as a result of the extension of built surfaces, the urban areas of the region are very affected by drought. For agricultural management, as well as for general water supply, the aridity in north-eastern Romania needs to be investigated at seasonal and monthly scales, using also other indices. Northeastern Romania is a region rich in surface water resources: the annual discharge volumes of Prut River and its tributaries reached 1.917 billion m3 in the year 2017. In the, the demand for industrial water supply has diminished, while the big demands came from fish farms. Two billion m3 from Prut River in its main tributary, Jijia were transferred, for water supply of the Ciobarciu wetland in 2017
Evaluation of in vitro corrosion resistance and in vivo osseointegration properties of a FeMnSiCa alloy as potential degradable implant biomaterial
No full textIn vitro electrochemical characterization and in vivo implantation in an animal model were employed to
evaluate the degradation behaviour and the biological activity of FeMnSi and FeMnSiCa alloys obtained using
UltraCast (Ar atmosphere) melting. Electrochemical characterization was based on open circuit potential measurement,
electrochemical impedance spectroscopy and potentiodynamic polarization techniques while the alloys
were immersed in Ringer's solution at 37 °C for 7 days. Higher corrosion rates were measured for the Cacontaining
material, resulting from inefficient passivation of the metal surface by oxy-hydroxide products. In
vivo osseointegration was investigated on a tibia implant model in rabbits by referring to a standard control
(AISI 316 L) stainless steel using standard biochemical, histological and radiological methods of investigation.
Changes in the biochemical parameters were related to the main stages of the bone defect repair, whereas
implantation of the alloys in rabbit's tibia provided the necessary mechanical support to the injured bone area
and facilitated the growth of the newly connective tissue, as well as osteoid formation and mineralization, as
revealed by either histological sections or computed tomography reconstructed images and validated by the
bone morphometric indices. The present study highlighted that the FeMnSiCa alloy promotes better osteoinduction
and osseconduction processes when compared to the base FeMnSi alloy or with AISI 316 L, and in
vivo degradation rates correlate well with corrosion resistance measurements in Ringer's solution
Cercetări privind degradarea mediului în zonele de ramificare a albiilor de râu
No full textThe conservation of the ecological system of riverbeds is a necessity for ensuring the living conditions of the aquatic and riparian habitat. A number of special problems are imposed by the riverbed branches where an island is created. The research carried out on the lower course of the Moldova River, where the riverbed was artificially branched (Cordunarea, NeamţCounty) highlighted the need for a set of works on ecological restoration of the aquatic and riparian environment. The presence of economic disturbances in these areas(water capture)has led to significant morphological changes on the two arms of the Moldova River. The aquatic vegetation is almost completely degraded on the active arm of the river. The secondary arm of the riverbed has a variable flow over time, a situation that generates unviable living conditions for the habitat