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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
15/04/1999 |
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Data da última atualização: |
15/04/1999 |
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Autoria: |
BUTCHER, J. E.; CALL, J. W.; BLAKE, J. T.; SHUPE, J. L. |
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Afiliação: |
Utah State University, Logan Utah. |
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Título: |
Dietary phosphorus levels can cause problems in beef cows. |
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Ano de publicação: |
1979 |
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Fonte/Imprenta: |
Proceedings, Western Section, American Society of Animal Science, v.30, p.312-314, 1979. |
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Idioma: |
Inglês |
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Conteúdo: |
Forty-eight 7-month old Hereford heifers, obtained in November 1973, were individually fed for 4 years on a basal ration containing .14% phosphorus (P) or approximately 66% NRC requirements and one-half or 24 of these maturing females were supplemented with monoisodium phosphate to have an average phosphorus intake of .36% or 174% of NRC requirements. During 4 years, there were no significant differences in growth rate, appetite or reproductive rate (3 calvings) and difference in blood, bone and muscle tissues were animal. After the 4 years, one-half of the animals on thew .14% and one-half of the animals on the .36% P were reassigned to a .09% P basal diet and the other 2 treatments were maintained at the previous levels with supplementation of monosodium phosphate. The 21 cows that were put on the reduced level (.09% P) went through the last two-thirds of preganancy, lactation and rebreeding with no apparent adverse effects. Some reduced appetite was noted after 8 months, and after 14 months almost one-half of the cows on the .09% P level had significantly reduced appetites. Necropsy studies on one cow the low level (.09% P) indicated decreased bone density and increased likelihood of fractures. Cows on the .14% P and the .36% P did not have depressed appetite. The 10 cows on the .36% P had a 60% conception rate, as compared to 91% for the 11 cows on the .14% P and 95% conception rate for the 21 cows on the .09% P diet. Urine and fecal studies indicate significantly decreased phosphorus excretion as dietary phosphorus decreases. MenosForty-eight 7-month old Hereford heifers, obtained in November 1973, were individually fed for 4 years on a basal ration containing .14% phosphorus (P) or approximately 66% NRC requirements and one-half or 24 of these maturing females were supplemented with monoisodium phosphate to have an average phosphorus intake of .36% or 174% of NRC requirements. During 4 years, there were no significant differences in growth rate, appetite or reproductive rate (3 calvings) and difference in blood, bone and muscle tissues were animal. After the 4 years, one-half of the animals on thew .14% and one-half of the animals on the .36% P were reassigned to a .09% P basal diet and the other 2 treatments were maintained at the previous levels with supplementation of monosodium phosphate. The 21 cows that were put on the reduced level (.09% P) went through the last two-thirds of preganancy, lactation and rebreeding with no apparent adverse effects. Some reduced appetite was noted after 8 months, and after 14 months almost one-half of the cows on the .09% P level had significantly reduced appetites. Necropsy studies on one cow the low level (.09% P) indicated decreased bone density and increased likelihood of fractures. Cows on the .14% P and the .36% P did not have depressed appetite. The 10 cows on the .36% P had a 60% conception rate, as compared to 91% for the 11 cows on the .14% P and 95% conception rate for the 21 cows on the .09% P diet. Urine and fecal studies indicate significantly decrea... Mostrar Tudo |
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Palavras-Chave: |
Estudo; Study. |
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Thesagro: |
Dieta; Gado de Corte; Nutrição. |
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Thesaurus Nal: |
beef cattle; diet; nutrition. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02212naa a2200253 a 4500
001 1795256
005 1999-04-15
008 1979 bl --- 0-- u #d
100 1 $aBUTCHER, J. E.
245 $aDietary phosphorus levels can cause problems in beef cows.
260 $c1979
520 $aForty-eight 7-month old Hereford heifers, obtained in November 1973, were individually fed for 4 years on a basal ration containing .14% phosphorus (P) or approximately 66% NRC requirements and one-half or 24 of these maturing females were supplemented with monoisodium phosphate to have an average phosphorus intake of .36% or 174% of NRC requirements. During 4 years, there were no significant differences in growth rate, appetite or reproductive rate (3 calvings) and difference in blood, bone and muscle tissues were animal. After the 4 years, one-half of the animals on thew .14% and one-half of the animals on the .36% P were reassigned to a .09% P basal diet and the other 2 treatments were maintained at the previous levels with supplementation of monosodium phosphate. The 21 cows that were put on the reduced level (.09% P) went through the last two-thirds of preganancy, lactation and rebreeding with no apparent adverse effects. Some reduced appetite was noted after 8 months, and after 14 months almost one-half of the cows on the .09% P level had significantly reduced appetites. Necropsy studies on one cow the low level (.09% P) indicated decreased bone density and increased likelihood of fractures. Cows on the .14% P and the .36% P did not have depressed appetite. The 10 cows on the .36% P had a 60% conception rate, as compared to 91% for the 11 cows on the .14% P and 95% conception rate for the 21 cows on the .09% P diet. Urine and fecal studies indicate significantly decreased phosphorus excretion as dietary phosphorus decreases.
650 $abeef cattle
650 $adiet
650 $anutrition
650 $aDieta
650 $aGado de Corte
650 $aNutrição
653 $aEstudo
653 $aStudy
700 1 $aCALL, J. W.
700 1 $aBLAKE, J. T.
700 1 $aSHUPE, J. L.
773 $tProceedings, Western Section, American Society of Animal Science$gv.30, p.312-314, 1979.
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Registro original: |
Embrapa Pantanal (CPAP) |
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