Degradabilidade in situ da matéria seca e proteína bruta das silagens de seis genótipos de sorgo (Sorghum bicolor (L.) Moench) em diferentes estádios de maturação.

• Autor(a) principal: MOLINA, L. R.
• Data de Publicação: 2002
• Outros Autores: GONCALVES, L. C., RODRIGUEZ, N. M., RODRIGUES, J. A. S., FERREIRA, J. J., CASTRO NETO, A. G. de
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
• Texto Completo: http://www.alice.cnptia.embrapa.br/alice/handle/doc/489169
• topic: Dry matter; Sorghum; protein degradation; plant development; steers; silage

In order to evaluate the in situ degradability of the dry matter (DM) and crude protein (CP) of silages of six sorghum genotypes in different stages of maturation, four fistulated crossbred Holstein-Zebu steers, fed with grass hay ad libitum, were utilized. The silage samples were dried and milled at 5 mm screen and 5 g of each sample was placed in 12x18 cm nylon bags with a 50 micro m porous size, and were introduced into the fistulas. After incubation (6, 12, 24, 48, 72 and 96 h), the nylon bags were removed, the samples from the same genotype, animal and time of incubation were transformed in a homogenous pool and milled at 1 mm screen, and stored for further analysis of DM and CP. It used the split-split plot design in which the parcels contained the silages of the different genotypes. In this study, there were differences in DM and CP disappearance of the sorghum silages, although these cannot be attributed to the percentage of grains in the different genotypes. The age of the plant influenced the effective degradability of digestible fractions, benefiting early stages..