Data/hora: 22/06/2024 03:27:21

Biblioteca(s): | Embrapa Caprinos e Ovinos.
Data corrente: | 29/01/2019
Data da última atualização: | 29/01/2019
Autoria: | MARTIN, L. C.; AMMERMAN, C. B.; HENRY, P. R.; LOGGINS, P. E.
Título: | Effect of level and form of supplemental energy and nitrogen on utilization of low quality roughage by sheep.
Ano de publicação: | 1981
Fonte/Imprenta: | Journal of Animal Science, v. 53, n. 2, p. 479-488, Aug. 1981.
DOI: | https://doi.org/10.2527/jas1981.532479x
Idioma: | Inglês
Conteúdo: | Abstract: Three voluntary intake and metabolism studies were conducted to compare various levels and forms of nonprotein N (urea and biuret) and energy (corn and sugarcane molasses) as supllements for sheep consuming a low quality forage. In Exp. 1, sheep consumed hay containing 3.9% crude protein plus a dialy supplement of 0, 5 or 10 g of urea N in combination with 80 or 160 g of molasses. A control treatment group was fed no supplemental energy or N. sheep given 160 g of mollasses daily consumed less (P<.05) hay than control animals (480 vs 597 g). Increasing N levels improved (P<.05) cellulose digestiblity, organic matter digestibility and N retention. Blood urea N (BUN) levels increased with greater supplemental N levels. In Exp. 2, sheep consumed hay containing 3.4% crude protein plus a daily supplement of 0, 5 or 10 g of biuret N in combination with 0, 80 or 160 g of molasses. Cellulose digestibility was decreased (P<.05) by molasses supplementation, while organic matter digestibility was increased (P<.05) with increasing levels of biuret N. In Exp. 3, sheep fed hay containing 3.6% crude protein were supplied with either no supplemental N or 7 g of N daily from urea or biuret in combination with 60 g of dry energy supplement (50% corn meal, 25% corn starch, 25% sucrose; 4.8% crude protein) or 80 g of molasses. Cellulose and organic matter digestibilities were improved (P<.05) when diets were supplemented with urea or biuret. Supplemental energy improved (P<.05) organic matter digestibility and N retention. Prefeeding BUN values for sheep consuming urea were lower (P<.05) than those for sheep consuming biuret.
Palavras-Chave: | Low quality forages.
Thesaurus Nal: | Biuret; Dietary mineral supplements; Molasses; Nitrogen; Ruminant nutrition; Sheep; Urea.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Caprinos e Ovinos (CNPC)
Exemplares: | CNPC - (38744-1) - ADD - AP - PP -  -  -  - DIS