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Search Results: 1 - 10 of 32716 matches for " Daniel Comiran;Garbiate "
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Eficiência agron?mica de superfosfato triplo e fosfato natural de Arad em cultivos sucessivos de soja e milho
Ono, Fábio Benedito;Montagna, Juliano;Novelino, José Oscar;Serafim, Milson Evaldo;Dallasta, Daniel Comiran;Garbiate, Marcos Vinicios;
Ciência e Agrotecnologia , 2009, DOI: 10.1590/S1413-70542009000300010
Abstract: the aim of this study was to evaluate the effects of phosphate fertilizer rates on soybean and corn crops, in crop rotation. the experiment was carried out in a greenhouse at the grande dourados university, in pots with samples of 5.5 dm3 clayey dystropherric red latosol, where the triple superphosphate (tsp) and the arad rock phosphate (arp) were used as p source. two kinds of arp were used. in one, the total p (arad t) was considered while in the other, only the p soluble fraction in citric acid at the concentration of 2% (arad sa) was considered, resulting in three factors of study, each with six levels of p (0, 56, 112, 224, 336, and 560 mg dm-3). the soybean was sowed in december 2006 and in the end of the cycle, the crop was harvested and evaluated for grain yield, p concentration in leaves and in the soil. after the soybean crop, it was turn for the corn sowing, which harvest occurred 76 days after sowing. the shoot dry matter and p concentrations in leaves were evaluated. the index of agronomic efficiency was calculated for both crops. we concluded that the tsp caused a better soybean grain yield, when compared to the arp. in the corn crop succeeding the soybean crop, the arp tended to be similar to the tsp values in the attributes evaluated.
Hematoma após raquianestesia tratado conservadoramente: relato de caso e revis?o da literatura
Segabinazzi, Daniel;Brescianini, Betina Comiran;Schneider, Felipe Gornicki;Mendes, Florentino Fernandes;
Revista Brasileira de Anestesiologia , 2007, DOI: 10.1590/S0034-70942007000200008
Abstract: background and objectives: spinal anesthesia caries the risk of bleeding. compression of nervous tissue secondary to the formation of a hematoma can cause neurological damage, which, if not diagnosed and treated in a timely fashion, can be permanent. the identification of risk factors, diagnosis, and early treatment are important for the prognosis. the objective of this report was to describe the case of a hematoma after spinal anesthesia treated conservatively, and review the literature. case report: male patient, 73 years old, 65 kg, 1.67 m, and asa physical status iii, underwent spinal anesthesia for removal of a peritoneal dialysis catheter. during the puncture, the patient experienced paresthesia of the right lower limb. fifteen milligrams of 0.5% hyperbaric bupivacaine without vasoconstrictor were administered. twenty-four hours later, saddle anesthesia and lumbar pain persisted and, after 48 hours, the patient presented urinary incontinence. an mri demonstrated the presence of an expansive subarachnoid process compressing the nerve roots (l4 and s1). after evaluation by the neurosurgeon, conservative treatment was instituted. the patient was discharged from the hospital on the 18th postoperative day, asymptomatic. conclusions: the case reported here presented a good evolution with the conservative treatment.
Effect of temperature and pre-germination treatments on seed germination and seedling vigor of Jatropha curcas L
Leandro Henrique de Sousa Mota,Rafael Heinz,Marcos Vinicios Garbiate,Silvana de Paula Quint?o Scalon
Biotemas , 2012,
Abstract: To date, there are no official methods used to test the seed germination of physic nut (Jatropha curcas) and there have only been a few attempts to optimize the germination of this species. The objective of this study was to evaluate the effect of different temperatures and pre-germination treatments on the germination and seedling vigor of J. curcas. The treatments were arranged in a completely randomized factorial scheme with four temperatures (20, 25, 30 and 20-30°C) x two types of seeds (with and without the seed tegument) x six periods of water imbibition (0, 6, 12, 18, 24 and 30h). The seeds were sown using a roller system with four replications of 50 seeds for each treatment. The germination percentage was higher for seeds stored at 25°C, when the seed tegument was maintained. When the time of water imbibition was increased, the germination percentage decreased, as well as the index of germination velocity and the percentage of germination of the first count. Imbibition for up to 12h led to an increase in hypocotyl growth. For this species, the maximum germination potential and highest vigor were obtained at 25°C, for seeds with teguments that were maintained and were not submitted to water imbibition.
Infiltra??o de água no solo em áreas cultivadas com cana-de-a?úcar sob diferentes sistemas de colheita e modelos de ajustes de equa??es de infiltra??o
Tomasini, Bruno A.;Vitorino, Antonio C. T.;Garbiate, Marcos V.;Souza, Cristiano M. A. de;A. Sobrinho, Teodorico;
Engenharia Agrícola , 2010, DOI: 10.1590/S0100-69162010000600007
Abstract: the sugarcane harvesting techniques do not always follow the precepts of soil conservation, which may influence soil physical properties with consequent change in the rate of soil water infiltration. the study aimed to evaluate the effect of different cropping systems (manual cutting and automated cutting) of sugarcanes (green and burned), on water infiltration in the soil and to determine the adequacy of mathematical models to estimate the rate of water infiltration in the soil profile. it was used a portable rainfall simulator calibrated to apply rainfall of 60 mm h-1. tests of water infiltration in the soil were carried out in three cropping systems: manual harvesting of burnt cane, mechanical harvest of green cane and mechanical harvesting of burnt cane. the quality of the adjustment of models was evaluated by non-linear regression between the estimated values and the mean observed for each treatment. in the treatment where mechanical harvesting was applied it was observed a decreasing in the final infiltration rate compared to the area under manual harvesting of burnt cane. the equation of horton was the most suitable to estimate the water infiltration rate in soil.
Eros?o em entre sulcos em área cultivada com cana crua e queimada sob colheita manual e mecanizada
Garbiate, Marcos Vinícios;Vitorino, Antonio Carlos Tadeu;Tomasini, Bruno Andrade;Bergamin, Anderson Cristian;Panachuki, Elói;
Revista Brasileira de Ciência do Solo , 2011, DOI: 10.1590/S0100-06832011000600029
Abstract: although a number of studies related to environmental issues address air pollution, the increased use of biotechnology and mechanical harvesting of sugar cane, less attention has been paid to the negative environmental impacts caused by laminar erosion. this study aimed to determine the levels of organic matter (om) and nutrients (p, k, ca and mg) in sediment and runoff water from interrill erosion from different sugarcane harvest systems (green and burnt cane), on a loamy dystrophic red latosol (oxisol). the treatments consisted of burnt cane harvested by hand, mechanical harvesting of green cane and mechanical harvesting of burnt cane. a portable rainfall simulator was calibrated to apply rainfall of 60 mm h-1, for 50 min. the sediment concentration in runoff resulting from interrill erosion, as well as om, p, k, ca and mg were higher in the system with mechanical harvesting of burnt cane, while losses were lowest from the system with mechanized harvesting of green cane. the soil physical quality is negatively influenced by the management system with mechanical harvesting of burnt cane, due to the pressure exerted by the harvest machine traffic. however, crop residues distributed across the soil surface at mechanical harvesting of green cane reduce losses of soil, nutrients and om in the sediment, and increase the soil resistance against physical degradation caused by machinery traffic for mechanical harvesting of sugarcane.
Maize yield and rainfall on different spatial and temporal scales in Southern Brazil
Bergamaschi, Homero;Wheeler, Timothy Robert;Challinor, Andrew Juan;Comiran, Flávia;Heckler, Bruna Maria Machado;
Pesquisa Agropecuária Brasileira , 2007, DOI: 10.1590/S0100-204X2007000500001
Abstract: this study aimed to establish relationships between maize yield and rainfall on different temporal and spatial scales, in order to provide a basis for crop monitoring and modelling. a 16-year series of maize yield and daily rainfall from 11 municipalities and micro-regions of rio grande do sul state was used. correlation and regression analyses were used to determine associations between crop yield and rainfall for the entire crop cycle, from tasseling to 30 days after, and from 5 days before tasseling to 40 days after. close relationships between maize yield and rainfall were found, particularly during the reproductive period (45-day period comprising the flowering and grain filling). relationships were closer on a regional scale than at smaller scales. implications of the crop-rainfall relationships for crop modelling are discussed.
Condutancia da folha em milho cultivado em plantio direto e convencional em diferentes disponibilidades hídricas
Bianchi, Cleusa Adriane Menegassi;Bergonci, Jo?o Ito;Bergamaschi, Homero;Dalmago, Genei Antonio;Heckler, Bruna Maria Machado;Comiran, Flávia;
Ciência Rural , 2007, DOI: 10.1590/S0103-84782007000200004
Abstract: the occurrence of water deficit during the maize crop cycle may affect the physiological processes of plants. the objective of this research was to evaluate alterations in the leaf conductance of maize plants, submitted to different soil tillage systems and water availability in the soil. a field experiment was carried out in the esta??o experimental agron?mica of the universidade federal do rio grande do sul, in the summer season of 2002/03. the maize was cropped in no-tillage (nt) and conventional tillage (ct) systems, with full irrigation (i2) necessary to maintain the soil moisture close to the field capacity, partial irrigation (i1) corresponding to 41% of the water application in i2, and non-irrigation (i0). the measurements were taken at 10h and 13h (local time), in order to characterize the maximum and minimum leaf conductance, respectively. during the vegetative plant growing, the lowest values of either maximum and minimum leaf conductance occurred in the no-tillage system. however, since the maximum leaf area index was achieved (at tasseling stage), the maize plants cropped in no-tilt soil presented the highest leaf conductance, indicating a higher soil water availability in nt than in ct.
Uso da radia??o solar pelo milho sob diferentes preparos do solo, espa?amento e disponibilidade hídrica
Kunz, Jefferson Horn;Bergonci, Jo?o Ito;Bergamaschi, Homero;Dalmago, Genei Antonio;Heckler, Bruna Maria Machado;Comiran, Flavia;
Pesquisa Agropecuária Brasileira , 2007, DOI: 10.1590/S0100-204X2007001100001
Abstract: the objective of this work was to evaluate the efficiency of interception and use of photosynthetically active radiation (par) by maize crops submitted to different conditions of soil tillage, plant arrangement, and water availability. maize was cropped in no-tillage and conventional tillage, combined to treatments of soil water availability (irrigated and in rain fed), and plant row spacing (40 and 80 cm among rows). sensors were installed in each treatment, for measuring the par transmitted by the canopy to the soil surface, while the incoming par was measured above the crop. increments of efficiency of interception were obtained by reducing the row spacing in all treatments. higher values of efficiency of interception were observedin no-tillage than in conventional tillage. water deficits reduced efficiency of interception due to the rolling up of leaves, and this effect was higher in conventional tillage than in no-tillage, for both row spacings. although the highest efficiency of interception was obtained with 0.4 m spacing, the efficiency of par use did not differ among treatments of row spacing. however, efficiency of use of maize crops was reduced by water deficits.
Indicadores da condi??o hídrica do solo com soja em plantio direto e preparo convencional
Martorano, Lucieta G.;Bergamaschi, Homero;Dalmago, Genei A.;Faria, Rogério T. de;Mielniczuk, Jo?o;Comiran, Flávia;
Revista Brasileira de Engenharia Agrícola e Ambiental , 2009, DOI: 10.1590/S1415-43662009000400005
Abstract: soil water condition indicators were assessed in a field experiment conducted in eldorado do sul, brazil. the paleudult soil of the experimental area has been managed during eight years under no-tillage and conventional tillage. soy bean cultivar fepagro rs-10 was sown on november 20, 2003, with 0.40 m of row spacing and 300,000 plants ha-1, with and without irrigation. variables of soil, plant and atmosphere were monitored with emphasis during drought periods. variations of the matrix water potential were monitored from 0.075 to 1.20 m of soil depth. a regular delay was observed in the soil drying process in no-tilled plots, in particular during drought periods, indicating higher water storage in no-tillage than in conventional tillage. higher matrix water potential, lower maximum temperature and smaller thermal amplitude were observed in no-tillage, in comparison to the conventional tillage. indirect indicators, such as plant height and leaf area index, were in accordance to the higher water storage in no-tilled plots, due to reductions of water deficit in plants. this set of indicators demonstrated the importance of evaluating crop responses in a systemic approach to soil and water management.
Microclima e produ??o de videiras 'Niágara rosada' em cultivo organico sob cobertura plástica
Comiran, Flávia;Bergamaschi, Homero;Heckler, Bruna Maria Machado;Santos, Henrique Pessoa dos;Alba, Diane;Saretta, Ezequiel;
Revista Brasileira de Fruticultura , 2012, DOI: 10.1590/S0100-29452012000100021
Abstract: the use of plastic covering on vineyards has increased in southern brazil, allowing mitigating climate limitations. this study aimed to quantify micrometeorological alterations caused by plastic covering over grapevines 'niagara rosada', and the effects on plant growth and grapes production in organic cultivation. a field experiment was conducted in bento gon?alves, state of rio grande do sul (brazil), in a vineyard conducted in pergola system, under two conditions: in open sky and covered with a transparent plastic film (160μm) in discontinuous arcs. the photosynthetically active radiation (par) and air temperature were monitored in both environments. the crop phenology, leaf area index (lai), the weight, diameter, sugar concentration and acidity of grapes, the incidence of fungal diseases, and yield were determined. the plastic covering reduced the incoming par in about 34% and increased the maximum air temperature (+3.1 oc). it accelerated the plant phenology until ripening, but delayed the leaf senescence. lai and leaf area duration have also increased, while fungal diseases did not occur on covered plants. grape yields were 12.3 and 27.1 t ha-1 for the uncovered and covered vineyards, respectively. therefore, the plastic covering may be an important alternative for producing table grapes in organic systems, in southern brazil.
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