Avaliação da vinhaça líquida em substituição à água na terminação de bovinos em confinamento. 1. Desempenho

During 90 days 243 finishing feedlot animals from two genetic groups, were weighed every 28 days in a randomized experimental procedure in a 2 x 3 factorial arrangement, with two breeds - Nelore (Nel) and Canchim (Can) - and three treatments: water (A), cane stillage + magnesium oxide (V) and cane stillage + magnesium oxide + sodium bicarbonate (V + B). The diet for all treatments was composed of 70% of corn silage and 30% of chopped sugar cane ad libitum plus 1 kg of ground corn and 1,5 kg of soluble yeast per animal. Results showed higher weight gain (P < 0,01) of the Can group relation to those of Nel, having respectively 1,35 and 1,22 kg/head/day. Both Can and Nel groups showed higher weight gain (P <.01) when fed with V + B, with 1,44 and 1,32 kg/head/day respectively when comparing to the other diets: Can (A) = 1,30; Can (V) = 1,31; Nel (A) = 1,16 and Nel (V) = 1,20 kg/head/day. The diet using V + B has also showed a tendency (.05

Desempenho do irrigâmetro no manejo da água de irrigação na cultura do feijoeiro

In this work, the aim was to evaluate the performance of Irrigameter in the management of the irrigation water, led in the culture of the bean plant, comparatively to the use of the methods standard of stove, tensiometers, Bouyoucos, automatic meteorological station and pan Class A. Irrigameter was adjusted to the soil characteristics, culture of the bean and irrigation equipment to confection the management ruler. For direct estimation of the evapotranspiration of the culture of the bean plant in your development stadiums, Irrigameter operated inside with heights of the levels of water of the evaporatorio same to 2, 3 and 5 cm, corresponding to the stadiums of initial development, vegetative development and flowering, respectively. The humidity obtained by the standard method of stove it was adopted as reference in the comparisons of the irrigation depth. Irrigameter can be used in the management of the irrigation to determine the consumption of water directly for a culture, in any development stadium; the methods that estimate the evapotranspiration of the culture overestimated the irrigation depth recommended by the standard method of stove, happening behavior contrary with the ones that determines the current humidity of the soil.

Consumo e custo de energia elétrica na cultura de citros irrigado por gotejamento e microaspersão, com três lâminas de água

The objective of this work was to analyze the consumption, electric energy cost, and economic results of irrigated citrus (Citrus sinensis). The treatments consisted of a dripping irrigation system with one and two lateral distribution lines, a micro sprinkler irrigation system and a treatment without irrigation. For each irrigation system, three water depths were used: 100%, 75% and 50% of Etc (citrus evapotranspiration). The electric energy cost for two tariff groups, Group A and Group B, was studied. For Group A, the expenses with energy were determined for the Conventional Binomial Structure tariff, the Hour-seasonal tariff (green and blue) and the special tariff for nocturnal irrigation. The kWh cost for the tariff systems were obtained from the website of CPFL (São Paulo State Power and Light Company, Brazil). The best relation between the electric energy consumption (kWh.ha -1) and productivity (t.ha -1) occurred in the treatment irrigated with 50% of the Etc. The irrigated treatments increased productivity. The biggest productivity was observed in the irrigation treatments with 50% of the Etc when compared to the ones with 100% of the Etc. The blue and green Hour-seasonal tariff system of Group A (nocturnal irrigation) was the best option. A biggest economic turnover occurred in the treatments irrigated with 50% of the Etc.

Contaminação das águas subterrâneas por nitrogênio devido à irrigação com efluente do tratamento de esgoto

Agriculture is an activity in which there is the possibility of using lower quality water and reuse appears as an alternative for irrigation. However, the negative environmental effects of reuse must be understood. The objective of the present work was to verify the potential of groundwater contamination by nitrogen duo to drip irrigation with effluent from domestic wastewater treatment. Three crop cycles of lettuce cv. Raider were conducted, the first between October and November 2009, the second in April and May 2010 and the third one in June and July 2010. The use of effluents was compared with potable water at accumulated water depths of 98.8 mm for the first, 98.4 mm for the second and 119 mm for the third cycle. Soil percolate concentrations of nitrate, nitrite and ammonia were studied at 0.25 m and 0.50 m depths in a completely randomized design. Percolate concentrations of nitrite and ammonia in soil irrigated with effluents showed no groundwater contamination risk. Nitrate however, caused concern, albeit with similar concentrations for both effluent and potable water.

Tratamento térmico na manutenção da qualidade de lichias armazenadas sob refrigeração

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Utilização de macrófitas aquáticas flutuantes no tratamento de efluentes de carcinicultura

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Intensificação do cultivo de Macrobrachium amazonicum: efeito das estratégias de estocagem e despesca na água dos viveiros, efluentes e sedimentação em viveiros de crescimento final

Pós-graduação em Aquicultura - FCAV

Tratamento de efluentes de piscicultura utilizando sistema tipo wetland povoado com espécies de macrófitas aquáticas de três tipos ecológicos diferentes

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Capacidade de retenção e dinâmica de um wetland construído no tratamento de águas residuais

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Dinâmica da qualidade da água em tanques de peixes de sistema pesque-pague: aspectos físico-químicos e plâncton

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Comunidades de peixes e integridade biótica do Córrego da Água Limpa na fase de pré-recuperação de matas ciliares

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Influência da temperatura e de cargas de nutrientes no crescimento da macrófita aquática flutuante Eichhornia crassipes (Mart.) solms cultivada em água enriquecida artificialmente

Pós-graduação em Ciências Biológicas (Biologia Vegetal) - IBRC

Avaliação dos efeitos fisiológicos e bioquímicos do tratamento com curcumina incorporada ao iogurte no diabetes experimental

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Desenvolvimento da grama esmeralda (Zoysia japonica Steud) sob dois manejos de irrigação

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Impacto do tratamento térmico com baixa umidade sobre as características físico-químicas e reológicas de amidos de mandioca, araruta e mandioquinha-salsa

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)