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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
28/11/2000 |
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Data da última atualização: |
11/12/2023 |
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Autoria: |
PFEFFER, E.; RODEHUTSCORD, M. |
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Título: |
Body chemical composition and utilization of dietary energy by male Saanen kids fed either milk to satiation or solid complete feeds with two proportions of straw. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
The Journal of Agricultural Science, v. 131, n. 4, p. 487-495, Dec. 1998. |
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DOI: |
https://doi.org/10.1017/S0021859698005966 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Of 41 male kids, 14 were killed immediately after birth (3±3 kg BW); the remainder were either fed on goat milk to satiation or weaned at 10 kg BW. After achieving 15±7 kg BW, weaned kids were fed on complete diets including either 20 or 40% straw. Milk-fed kids were slaughtered at 16±8 or 26±7 kg BW, weaned kids at 15±7 or 29±30 kg BW, respectively (at least four kids per treatment). Empty BW as a proportion of ®nal live BW was 0±91³0±02 in milk-fed kids compared to 0±85³0±04 and 0±76³0±04 in kids given complete feeds including 20 or 40% straw, respectively. Empty BW of kids in the heaviest groups were c. 24 kg for milk-fed or weaned kids. Energy and crude protein contents per kg empty BW increased from 4±5 MJ and 158 g in newborn kids to 12±2 MJ and 163 g in milk-fed kids or 10±4 MJ and 194 g in weaned kids, respectively. No in¯uence of the feeding system was found on mineral contents of empty BW. Ca, P and K remained constant at 12±6, 7±7 and 1±9 g}kg, Mg increased from 0±32 to 0±46 g}kg and Na decreased from 2±0 to 1±3 g}kg. Di?erences in composition of live BW gain are mainly caused by di?erences in gut-®ll. E?ciency of utilization of ME for growth was c. 0±75 in milk-fed kids even at high BW, but only 0±31 in weaned kids. Proportions retained of dietary N, Ca, P, Mg, Na and K were highest in milk-fed kids between birth and 16±8 kg BW: 0±57, 0±88, 0±78, 0±40, 0±37 and 0±10, respectively. They were lowest in kids fed on complete feed including 40% straw from 15±7 to 30±3 kg BW: 0±25, 0±26, 0±32, 0±04, 0±11 and 0±04, respectively. Weaning seems to be of greater in¯uence on composition of BW gain and e?ciency of utilization than the increase in empty BW. MenosAbstract: Of 41 male kids, 14 were killed immediately after birth (3±3 kg BW); the remainder were either fed on goat milk to satiation or weaned at 10 kg BW. After achieving 15±7 kg BW, weaned kids were fed on complete diets including either 20 or 40% straw. Milk-fed kids were slaughtered at 16±8 or 26±7 kg BW, weaned kids at 15±7 or 29±30 kg BW, respectively (at least four kids per treatment). Empty BW as a proportion of ®nal live BW was 0±91³0±02 in milk-fed kids compared to 0±85³0±04 and 0±76³0±04 in kids given complete feeds including 20 or 40% straw, respectively. Empty BW of kids in the heaviest groups were c. 24 kg for milk-fed or weaned kids. Energy and crude protein contents per kg empty BW increased from 4±5 MJ and 158 g in newborn kids to 12±2 MJ and 163 g in milk-fed kids or 10±4 MJ and 194 g in weaned kids, respectively. No in¯uence of the feeding system was found on mineral contents of empty BW. Ca, P and K remained constant at 12±6, 7±7 and 1±9 g}kg, Mg increased from 0±32 to 0±46 g}kg and Na decreased from 2±0 to 1±3 g}kg. Di?erences in composition of live BW gain are mainly caused by di?erences in gut-®ll. E?ciency of utilization of ME for growth was c. 0±75 in milk-fed kids even at high BW, but only 0±31 in weaned kids. Proportions retained of dietary N, Ca, P, Mg, Na and K were highest in milk-fed kids between birth and 16±8 kg BW: 0±57, 0±88, 0±78, 0±40, 0±37 and 0±10, respectively. They were lowest in kids fed on complete feed including 40% straw from 15... Mostrar Tudo |
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Palavras-Chave: |
Composicao corporal; Cria. |
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Thesagro: |
Caprino. |
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Thesaurus Nal: |
Dietary energy sources; Goats; Kids (goats); Males; Ruminant nutrition. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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