Guilherme Augusto Biscaro

Adubação nitrogenada em cobertura no girassol irrigado nas condições de Cassilândia-MS

O nitrogenio e o nutriente mais requerido pelas plantas por assumir funcoes importantes no metabolismo vegetal. Na cultura do girassol, sua deficiencia causa desordem nutricional, sendo o nutriente que mais limita a producao. Alem disso, doses elevadas podem aumentar a incidencia de pragas e doencas afetando a producao de graos. Conduziu-se o experimento com o objetivo de avaliar a resposta da cultura do girassol (Helianthus annuus L.) irrigado, submetido a diferentes doses de nitrogenio aplicado parceladamente, em cobertura. O delineamento experimental utilizado foi em blocos casualizados, com quatro repeticoes. Os tratamentos consistiram de quatro doses de nitrogenio (0, 20, 40 e 80 kg ha-1), na forma de ureia. A adubacao nitrogenada em cobertura proporcionou um aumento em todas as caracteristicas estudadas, sendo que a dose de N de maxima eficiencia tecnica para se ter uma boa produtividade e de 55 kg ha-1 de N para o cultivo do girassol, na regiao de Cassilândia-MS.

Produtividade de duas cultivares de mamona submetidas a diferentes lâminas de irrigação suplementar

This study evaluated the yield, components of production and oil content of two castor bean cultivars through drip irrigation with different water depths. The research was conducted in 2009 in an Oxisol clay in the experimental field in Dourados, Mato Grosso do Sul State. The experimental design was randomized blocks in factorial scheme with five water depths (0, 25, 50, 100 and 150% of evapotranspiration for drip irrigation) in two castor bean cultivars (IAC 2028 and IAC 80) with four replications. The irrigation schedule was predetermined up to two irrigations per week except on rainy days. The increase of irrigation provided significant increase in most components of production and crop yield without changing the oil content of seeds. The application of higher water depth increased yield by 80% in relation to the treatment that received no supplemental irrigation.

Avaliação de cultivares de arroz de terras altas sob condições de sequeiro em Cassilândia, MS

O uso de cultivares selecionadas e uma das tecnologias de mais facil adocao pelo agricultor, pois alem de incrementar a produtividade, e um dos insumos de menor custo na producao agricola. Assim, e fundamental obter informacoes sobre o desempenho de novas cultivares, nas mais diversas regioes de cultivo. Objetivou-se, neste trabalho avaliar o comportamento de cultivares de arroz de terras altas (Oryza sativa L.) (BRS Aroma, BRS Bonanca, BRS Colosso, BRSMG Conai, BRSMG Curinga, BRS Soberana, BRS Talento e IAC 202), sob condicoes de sequeiro, na regiao de Cassilândia, MS. O delineamento experimental foi o de blocos ao acaso, com quatro repeticoes. A semeadura foi realizada em 30 de novembro de 2005, no espacamento de 0,40 m entre linhas e 70 sementes viaveis por metro. As cultivares BRS Talento, IAC 202 e BRS Soberana apresentaram comportamento superior. As cultivares BRS Soberana, BRS Bonanca, BRS Colosso, IAC 202 e BRS Talento apresentaram maior rendimento de graos inteiros. E possivel obterse boa produtividade (acima de 3.000 kg ha-1), na cultura do arroz de terras altas sob condicoes de sequeiro no municipio de Cassilândia, MS, desde que sejam utilizadas cultivares adequadas.

Produtividade da canola sob irrigação e doses de adubação nitrogenada

The study was conducted in the May-September 2012 at the Universidade Federal da Grande Dourados, with the main to evaluate the productivity, morphological and productive components of canola (Hybrid Hyola 61) crop under different levels of nitrogen (topdressing) and irrigation. The experimental design was randomized blocks in a split-plot with four replications. The plots were irrigated and no irrigated. The subplots were three treatments with nitrogen (topdressing) doses of 30, 60 and 90 kg ha-1. With the use of irrigation crop attained better results in plant height, shoot dry mass and number of siliqua per plants. The oil content and thousand grain weights showed significant increases as a function of irrigation and nitrogen doses. The yield under irrigation was higher than non-irrigated, with values equal to 3145.65 and 1354.45 kg ha-1, respectively.

Produtividade de grãos, óleo e massa seca de girassol sob diferentes lâminas de irrigação suplementar

This research was conducted at the State University of Maringa, Umuarama Campus, Parana State, in the season 2008/2009, with the objective to evaluate the growth and irrigation use efficiency on yield of grain, oil and dry weight of sunflower under irrigation levels. In the irrigated treatments (L1, L2, L3 and L4) the crop coefficients (kc) used were equal (L2), below (L1) and above (L3 and L4) those proposed by FAO. The irrigation favored the crop growth and the highest yield was obtained from values of kc 100% above those proposed by FAO (L4). The highest irrigation use efficiencies were obtained from values of kc by FAO (L2). The grain yield without irrigation (L0) was equal to 4788 kg ha-1, while in L2 and L4 treatments, grain yields were equal to 6304 and 6963 kg ha-1, respectively. The irrigation did not increase the oil content and oil yield was proportional to grain yield.

Impacto energético da irrigação por gotejamento no cultivo de mamona

Irrigation is a technique with high potential to increase crop yield , however, it is necessary to evaluate the energetic efficiency of irrigated agriculture. So, this study aimed at evaluating the irrigation impact on grain yield and energetic balance of two castor bean cultivars submitted to supplementary drip irrigation with different water depths. The experiment was conducted in a clayey Dystrophic Purple Latosol, in Dourados, Mato Grosso do Sul State, Brazil. The experimental design was randomized blocks in a bifactorial scheme, with five water depths (0%, 25%, 50%, 100% and 150% of evapotranspiration for localized irrigation) and two castor bean cultivars (IAC 2028 and IAC 80), with four replications. The irrigation interval was of up to two irrigations per week, except for the days when rainfall occurred. Crop yield and the relation energy produced in the form of grains/energy used in cultivation were evaluated. It was concluded that the supplementary irrigation increased yield, as well as the relationship between energy production and consumption.

Diagnose nutricional com o uso de sensor óptico ativo em algodoeiro

This research aimed to evaluate the spectral response to variation of nitrogen levels and its relationship with leaf nitrogen, chlorophyll and yield in cotton crop. The experiment was conducted in Chapadao do Ceu, MS, in a randomized block design with four replications. The treatments consisted of five N rates of 0, 30, 70, 110 and 150 kg ha-1, divided in two applications at 28 and 41 days after emergence, using urea fertilizer as a source. The highest correlations of the chlorophyll index and normalized difference vegetation index with yield were observed in the fourth observation, at 56 days after emergence, indicating that in this period, yield may already be compromised if there is shortage in the supply of N to the crop. The results obtained indicated that the sensor becomes more sensitive to variations of nitrogen levels as the crop grows, but not when it reaches a high leaf area index and in the begining of the senescence. It is concluded that ground level remote sensing permits to estimate indirectly the amount of N absorbed, chlorophyll index and cotton yield.

Impact of irrigation on yield and energy balance of the production of oil and cake of two sunflower varieties

The energy balance for the production of sunflower oil and cake was carried out during the agricultural and industrial stage phase, where it was considered a cold extraction by hydraulic pressing, with the plant location in a rural area with a radius of 30km range. Data on productivity was used in two varieties of sunflower (Helio 358 and Aguara 04) grown in different seasons (2007/2008, 2008/2009), under different irrigation levels. Data showed that irrigation resulted in an increase in productivity of both varieties, and the best response was observed for Aguara 04 variety. Moreover, the increased intensity of irrigation negatively affected the energy balance, reducing the ratio between energy produced and energy used in the production chain. The most significant inputs in the energy intake were fertilizer followed by diesel oil, when irrigation was not used for. When the irrigation technique was used, the most significant inputs, in order of representativeness, were: energy, fertilizer and equipment.

Análise econômica e viabilidade energética da cultura do feijoeiro comum sob irrigação

This study was conducted to evaluate the economic and energetic viability of the third season of common bean under irrigation depths in the northwestern region of Parana. The experiment was established with six irrigation levels and four replications in a randomized block design. The bean crop was not economically viable without irrigation. Operating profit increased with increasing irrigation depths, reaching a total operating profit of R

Aspectos sanitários do cultivo da alface americana, irrigada com águas recptoras de efluentes urbanos

1,427.24 ha-1 by 333 mm irrigation depth. The equilibrium price without irrigation was R