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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
21/09/2017 |
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Data da última atualização: |
21/09/2017 |
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Autoria: |
BRADFORD, G. E.; WEIR, W. C.; TORELL, D. T. |
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Título: |
The effect of environment from weaning to first breeding on lifetime production of ewes. |
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Ano de publicação: |
1961 |
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Fonte/Imprenta: |
Journal of Animal Science, v. 20, n. 2, p. 281-287, May, 1961. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract : From weaning 50 ewe lambs were maintained on annual grassland range pasture which provided adequate feed for only 2 or 3 months in spring, followed by a dry season until early winter. This barely maintained weight for 6 months after weaning and allowed a slow gain until breeding the following year. From Julyto April50 similarlambs were kept on irrigated pasture of ladino clover and trefoil supplemented with lucerne hay to appetite from November to April. This promoted continuous growth. They were then transferred to the range pasture and both groups were kept there for 5 to 7 breeding seasons. The only supplement given was a mixture of salt and cottonseed from mating until the end of the dry season each year. Ewes which had been reared on good pasture were 34% heavier as yearlings than those reared on the range and remained significantly heavier until 41/2 years old and in some the difference was still seen at 6 years. They had greater heart girth and height at withers after a year on range and produced significantly more wool at the first and third shearings but at no other. They lambed significantly earlier, 8 days, in the first year; in subsequent years they lambed 2 to 3 days later than the other group. They raised fewer lambs per ewe in the 7 seasons but frequency of twins and weights of lambs at 120 days were the same in both groups. Total weight of lambs per ewe and lambs weaned per ewe were less in those given poor pasture at the start.-J. G. Gordon. |
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Palavras-Chave: |
Supplements; Weaning feeds. |
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Thesagro: |
Medicago Sativa; Trifolium Repens. |
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Thesaurus Nal: |
Ewes; Feeds; Forage; Grasslands; Hay; Lambs; Sheep. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02185nam a2200265 a 4500
001 2076005
005 2017-09-21
008 1961 bl uuuu u0uu1 u #d
100 1 $aBRADFORD, G. E.
245 $aThe effect of environment from weaning to first breeding on lifetime production of ewes.
260 $aJournal of Animal Science, v. 20, n. 2, p. 281-287, May$c1961
520 $aAbstract : From weaning 50 ewe lambs were maintained on annual grassland range pasture which provided adequate feed for only 2 or 3 months in spring, followed by a dry season until early winter. This barely maintained weight for 6 months after weaning and allowed a slow gain until breeding the following year. From Julyto April50 similarlambs were kept on irrigated pasture of ladino clover and trefoil supplemented with lucerne hay to appetite from November to April. This promoted continuous growth. They were then transferred to the range pasture and both groups were kept there for 5 to 7 breeding seasons. The only supplement given was a mixture of salt and cottonseed from mating until the end of the dry season each year. Ewes which had been reared on good pasture were 34% heavier as yearlings than those reared on the range and remained significantly heavier until 41/2 years old and in some the difference was still seen at 6 years. They had greater heart girth and height at withers after a year on range and produced significantly more wool at the first and third shearings but at no other. They lambed significantly earlier, 8 days, in the first year; in subsequent years they lambed 2 to 3 days later than the other group. They raised fewer lambs per ewe in the 7 seasons but frequency of twins and weights of lambs at 120 days were the same in both groups. Total weight of lambs per ewe and lambs weaned per ewe were less in those given poor pasture at the start.-J. G. Gordon.
650 $aEwes
650 $aFeeds
650 $aForage
650 $aGrasslands
650 $aHay
650 $aLambs
650 $aSheep
650 $aMedicago Sativa
650 $aTrifolium Repens
653 $aSupplements
653 $aWeaning feeds
700 1 $aWEIR, W. C.
700 1 $aTORELL, D. T.
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Embrapa Caprinos e Ovinos (CNPC) |
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