Ensilagem da cana-de-açúcar in natura ou queimada e aditivada ou não com óxido de cálcio

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Características morfogênicas, estruturais e composição química de cultivares de Brachiaria submetidas a níveis de oferta de forragem sob pastejo rotativo

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Substituição da fonte de forragem por farelo de babaçu em dietas de ovinos

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

Densidade nutricional e desempenho produtivo e reprodutivo de coelhas jovens

Pós-graduação em Zootecnia - FMVZ

Feno de erva-sal (Atriplex nummularia) na terminação de cordeiros Santa Inês

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Derivados da extração do óleo de girassol para vacas leiteiras

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Estudo comparativo de metodologias aplicadas em análises de fibra em detergente neutro e fibra em detergente ácido com gerenciamento de resíduos químicos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliação de dez gramíneas forrrageiras na região noroeste do Estado de São Paulo

Pós-graduação em Zootecnia - FCAV

Desenvolvimento de microrganismos e valor nutritivo de silagens de capim-Tifton 85

Pós-graduação em Zootecnia - FCAV

Produção e composição química da Brachiaria brizantha cv. Marandu adubada com água residuária de suinocultura

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Effect of nutritional density and season on the performance of young rabbit does before the first mating

The objective was to evaluate the effect of nutritional density and season on the performance of young rabbit does before the first mating. Forty-eight females from the Botucatu Genetic Group were used in each season (warm or cool), starting at the age of 70 days, housed in groups of four per cage up to 119 days, and reared individually from 120 to 140 days of age. The high-density diet was formulated to contain, on a 90% DM basis, 18.4% CP, 16.5% ADF and 2,500 kcal DE kg-1; whereas the low-density diet was formulated to contain 14.7% CP, 24% ADF and 2,000 kcal DE kg-1. The experiment was conducted according to a 2x2 factorial design (two diets x two seasons) with repeated measures (weeks). The high-density diet promoted lower feed intake, higher final weight, and higher daily weight gain, adjusted for constant intake. But these facts alone do not warrant using a high-density diet for growing rabbit does, because it could have a negative impact during the reproductive phase. In the warm season, there was a reduction in feed intake and an improvement in feed efficiency. Along time, however, the mean body weight of does was similar in the two seasons.

Chemical Composition, Rumen Fermentation Kinetics, Digestibility and Energy Value of Cassava Leaves Hay at Different Storage Times

Cassava leaves have been widely used as a protein source for ruminants in the tropics. However, these leaves contain high level of hydro-cyanic acid (HCN) and condensed tannins (CT). There are evidences that making hay can eliminate more than 90% of HCN and that long-term storage can reduce CT levels. A complete randomized design with four replicates was conducted to determine the effect of different storage times (0-control, 60, 90 and 120 days) on chemical composition, in vitro rumen fermentation kinetics, digestibility and energy value of cassava leaves hay. Treatments were compared by analyzing variables using the GLM procedure (SAS 9.1, SAS Institute, Inc., Cary, NC). Crude protein (CP) and ether extract (EE) of the cassava hay were not affected (P > 0.05) by storage time (17.7% and 3.0%, respectively). Neutral detergent fiber, acid detergent fiber, total carbohydrate and non-fiber carbohydrate were not affected either (P>0.05) by storage time (47.5, 32.6, 72.3 and 25.8% respectively). However, other parameters were influenced. CT was lower (P<0.05) in hay after 120 days of storage compared with control (1.75% versus 3.75%, respectively). Lignin and insoluble nitrogen in neutral detergent, analyzed without sodium sulfite, were higher (P<0.01) after 120 days of storage, compared with the control (11.22 versus 13.57 and 1.65 versus 3.81% respectively). This suggests that the CT has bound to the fiber or CP and became inactive. Consequently, the in vitro digestibility of organic matter (50.36%), total digestible nutrients (44.79%) and energy (1.61 Mcal/KgMS), obtained from gas production data at 72 h of incubation, has increased (P<0.05) with storage times (56.83%, 51.53% and 1.86 Mcal/KgMS, respectively). The chemical composition and fermentative characteristics of cassava hay suffered variations during the storage period. The best values were obtained after 90 days of storage. This is probably due to the reduction in condensed tannins.

Crude glycerin in diets for feedlot Nellore cattle

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

Análise isotópica (Delta15N) e química do capim-marandu adubado com ureia e cama de frango e diferido

Pós-graduação em Zootecnia - FMVZ

Milho ou polpa cítrica associados à glicerina na alimentação de bovinos de corte confinados

Pós-graduação em Zootecnia - FCAV