Data/hora: 09/06/2024 22:58:26

Biblioteca(s): | Embrapa Caprinos e Ovinos.
Data corrente: | 01/08/1992
Data da última atualização: | 12/12/2023
Autoria: | VERMOREL, M.
Título: | Feed evaluation for ruminants. II. The new energy systems proposed in France.
Ano de publicação: | 1978
Fonte/Imprenta: | LIvestock Production Science, v. 5, n. 4, p. 347-365, 1978.
DOI: | https://doi.org/10.1016/0301-6226(78)90030-1
Idioma: | Inglês
Conteúdo: | Abstract: The new systems of energy feed evaluation for ruminants (cattle, sheep, goats) proposed in France are described. Like the new Dutch and Swiss systems, they are based on net energy for lactation or net energy for maintenance plus meat production; the net energy contents of feeds are calculated from their ME content and the partial efficiencies of ME utilization for maintenance, lactation or fattening. However, they differ from the other systems in three aspects. 1. (1) The ME content of a feedstuff is estimated from its gross energy content, energy digestibility and the ratio between DE and ME. 2. (2) The energy values of feedstuffs are expressed in feed units (FU) (UFL for lactation and UFV for maintenance + meat production, with an animal production level of 1.5). One FU is the net energy value of 1 kg tandard barley. 3. (3) Energy allowances for slowly or rapidly growing animals have been determined using the results of feeding trials, due to the lack of information both on maintenance requirement and energy retention of animals of the various breeds used in France, and on the efficiency of ME utilization for growth.
Palavras-Chave: | Requerimento.
Thesagro: | Energia; Nutrição; Ruminante.
Thesaurus Nal: | Cattle; Feeds; Goats; Ruminant nutrition; Sheep.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Caprinos e Ovinos (CNPC)
Exemplares: | CNPC - (7761-1) - ADD - AP - DD -  -  -  - DIS