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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
13/06/1995 |
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Data da última atualização: |
11/09/1996 |
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Autoria: |
CALL, J. W.; BUTCHER, J. E.; BLAKE, J. T.; SMART, R. A.; SHUPE, J. L. |
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Afiliação: |
Utah State University Logan. |
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Título: |
Phosphorus influence on growth and reproduction of beef cattle. |
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Ano de publicação: |
1978 |
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Fonte/Imprenta: |
Journal of Animal Science, v.47, n.1, p.216-225, 1978. |
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Idioma: |
Inglês |
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Conteúdo: |
Ninety-six 7-month-old Hereford heifers (two replicatyes of 48, one year apart) were individually fed for 2 yeras a basal ration containing .14% phosphorus on an "as fed" basis, which approximated 66% NRC recommendations. Forty-eight of the animals were limited to this low phosphorus (P-) diet. The other 48 (P+) received sufficient monosodium phosphate, top dressed on the basal ration, to elevate phosphorus intake to .36% on an "as fed" basis (174% NRC recommendations). The average daily weight gain for all groups was .45 kg. Feed efficiency was similar for the two groups. There was no evidence of lack of appetite or depraved appetite in either group; nor was there a difference in age of puberty. The P- cattle had a 96% pregnancy rate with 91% live calves compared to 100% and 93%, respectively, for the P+ cattle. These differences were not significant. After 9 months on trial (approximately 16 months of age) no difference in rib bone morphology was discernable from microradiographs. Blood and serum levels of phosphorus temporarily increased in the P+ cattle, but at 16 months of age were comparable to the less fluctuating values in the P- cattle. The phosphorus levels for bone and muscle were similar each year and for each treatment. Urine and fecal phosphorus excretion was significantly higher in the P+ than in the P- cattle. |
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Palavras-Chave: |
Bone morphology; Growth; Morfologia de ossos. |
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Thesagro: |
Crescimento; Fósforo; Gado de Corte; Nutrição; Reprodução. |
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Thesaurus Nal: |
beef cattle; nutrition; phosphorus; reproduction. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02145naa a2200313 a 4500
001 1789704
005 1996-09-11
008 1978 bl --- 0-- u #d
100 1 $aCALL, J. W.
245 $aPhosphorus influence on growth and reproduction of beef cattle.
260 $c1978
520 $aNinety-six 7-month-old Hereford heifers (two replicatyes of 48, one year apart) were individually fed for 2 yeras a basal ration containing .14% phosphorus on an "as fed" basis, which approximated 66% NRC recommendations. Forty-eight of the animals were limited to this low phosphorus (P-) diet. The other 48 (P+) received sufficient monosodium phosphate, top dressed on the basal ration, to elevate phosphorus intake to .36% on an "as fed" basis (174% NRC recommendations). The average daily weight gain for all groups was .45 kg. Feed efficiency was similar for the two groups. There was no evidence of lack of appetite or depraved appetite in either group; nor was there a difference in age of puberty. The P- cattle had a 96% pregnancy rate with 91% live calves compared to 100% and 93%, respectively, for the P+ cattle. These differences were not significant. After 9 months on trial (approximately 16 months of age) no difference in rib bone morphology was discernable from microradiographs. Blood and serum levels of phosphorus temporarily increased in the P+ cattle, but at 16 months of age were comparable to the less fluctuating values in the P- cattle. The phosphorus levels for bone and muscle were similar each year and for each treatment. Urine and fecal phosphorus excretion was significantly higher in the P+ than in the P- cattle.
650 $abeef cattle
650 $anutrition
650 $aphosphorus
650 $areproduction
650 $aCrescimento
650 $aFósforo
650 $aGado de Corte
650 $aNutrição
650 $aReprodução
653 $aBone morphology
653 $aGrowth
653 $aMorfologia de ossos
700 1 $aBUTCHER, J. E.
700 1 $aBLAKE, J. T.
700 1 $aSMART, R. A.
700 1 $aSHUPE, J. L.
773 $tJournal of Animal Science$gv.47, n.1, p.216-225, 1978.
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Registro original: |
Embrapa Pantanal (CPAP) |
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