
Avaliou-se a degradabilidade ruminal da matéria seca (MS), proteína bruta (PB), fibra em detergente neutro (FDN), da fibra em detergente ácido (FDA) e hemicelulose dos fenos de capim-elefante (Pennisetum purpureum), palma (Opuntia ficus), guandu (Cajanus cajan) e parte aérea da mandioca (Manihot esculenta) utilizando três bovinos mestiços machos, castrados, canulados no rúmen e mantidos em regime de pasto. Amostras de 4g de cada alimento foram incubadas em duplicata no rúmen dos animais, nos períodos de 0, 6, 12, 24, 36, 48 e 72 horas. A degradabilidade potencial da PB dos fenos de capim-elefante e guandu foi semelhante, 83,9 e 81,2%, respectivamente. Os maiores valores foram observados para os fenos de palma (94,2%) e parte aérea da mandioca (91,7%). A degradabilidade efetiva (DE) foi obtida considerando as taxas de passagem de 2, 5 e 8%/hora. A maior DE observada para MS (60,5%), PB (81,1%), FDN (21,6%), FDA (27,9%) e HEM (58,0%), na taxa de passagem de 5%/h, ocorreu com o feno de palma.The ruminal degradability of dry matter (DM), crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF) and hemicellulose (HEM) of elephantgrass (Pennisetum purpureum), forage cactus (Opuntia ficus), pigeon pea (Cajanus cajan) and cassava foliage (Manihot esculenta) hays was evaluated using three cannulated crossbred steers, kept on pasture. Samples of four grams of each hay were incubated in the rumen for 0, 6, 12, 24, 36, 48 and 72 hours. The CP potential degradability (PD) for elephantgrass and pigeon pea hays was similar, 83.9 and 81.2%, respectively. Higher values were observed either for forage cactus (94.2%) or cassava foliage (91.7%) hays. The effective degradability (ED) was obtained considering the passage rates of 2, 5 and 8%/hour. The forage cactus hay, at a passage rate of 5%/h, showed the highest ED for DM (60.5%), CP (81.1%), NDF (21.6%), ADF (27.9%) and HEM (58.0%).
alternative feed, grass, alimento alternativo, forage, legume, SF1-1100, bovino, degradação in situ, Animal culture, forrageira, cattle, gramínea, in situ degradation, leguminosa
alternative feed, grass, alimento alternativo, forage, legume, SF1-1100, bovino, degradação in situ, Animal culture, forrageira, cattle, gramínea, in situ degradation, leguminosa
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