Data/hora: 20/06/2024 22:18:05

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 11/09/1995
Data da última atualização: | 21/08/2013
Autoria: | WALKER, D. M.; HEPBURN, W. R.
Título: | The nutritive value of rouchages for sheep. I.The relationship between the gross digestible energy and the chemical composition of hays.
Ano de publicação: | 1955
Fonte/Imprenta: | Journal of Agricultural Science, v.45, p.298-310, 1955.
Idioma: | Inglês

Conteúdo:

1. The relationship existing between the gross digestible energy content and the chemical composition of 24 hays been studied with nine Cheviot wether lambs over a period of 8 months. 2. Each hay was fed to a group of three lambs for a 10-day preliminary and 10-day collection period. Faeces and urine were collected in metabolism crates. 3. The hays were analysed for proximate nutrient and for some of the more precise chemical constituents as suggested in the scheme of Ferguson (1948). 4. A close relationship existed between the gross digestible energy contents of the hays and the structural components, as represented by crude fibre, lignin cellulose. 5. No improvemenmt in the accuracy of predicting the digestibility of energy was obtained by analysimg for lignin and cellulose as against crude fibre by A.O.A.C. method. 6. A 'crude fibre' obtained by digestion of the hay with 5% H2SO4 for 1 hr. was as closely related to the digestibility of energy as any of the other variables estimated. 7. Metabilizable energy was closely related to gross digestible energy when the energy of the urine was determined in a bomb calorimeter and the energy in methane calculated  from the digested carbohydrates in the hay. 8. The starch equivalentes of the hays were calculated from gross digestible energy and were compared with the starch equivalent values obtained by conventional methods.
The values derive from gross digestible energy were consistently lowere than the conventional values.

Palavras-Chave: | Hays.
Thesagro: | Carneiro; Composição Química; Digestibilidade; Feno; Valor Nutritivo.
Thesaurus Nal: | chemical composition; digestibility; nutritive value; sheep.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (29648-1) - ADD - SP - -- - SP1130 -  - 1130 - DIS