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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
01/08/1992 |
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Data da última atualização: |
28/04/2023 |
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Autoria: |
TURK, K. L.; MORRISON, F. B.; MAYNARD, L. A. |
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Título: |
The nutritive value of the proteins of alfalfa hay and clover haw when fed alone in combination with proteins of corn. |
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Ano de publicação: |
1934 |
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Fonte/Imprenta: |
Journal Agricultural Research, v. 48, n. 6, p. 555-570, Mar. 1934. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: In nitrogen metabolism studies with five growing wether lambs, the digestibility, storage, and biological value of the proteins of alfalfa hay and clover hay, and of the proteins in the combination of each hay with corn, have been determined. These rations were equalized in energy content by the addition of cornstarch and canesugar in various amounts. The average coefficients of apparent digestibility of protein were 50 for clover hay, 56 for alfalfa hay, 55 for the clover and corn combination, and 63 for the combination of alfalfa and corn. These results are statistically significant in showing that the protein of alfalfa is more digestible than that of clover and that the protein of the combination of each hay with corn has a higher digestibility than the protein of either hay when fed as the only source of protein. If allowance is made for the metabolic fecal nitrogen and the true digestibility of the ingested protein calculated, the same relative differences in digestibility were also shown. No marked differences were observed in the percentage of protein stored from the different rations. However, the difference in the protein storage from the combination of alfalfa and corn and the storage either from the alfalfa-hay or the clover-hay ration, were sufficient to indicate that these differences were possibly significant from a statistical standpoint. Very little difference was found in the efficiency with which the different proteins were utilized for growth and maintenance, as measured by the biological value. The average of the biological values was 81 for clover protein, 79 for alfalfa protein, 80 for the protein in the combination of clover and corn, and 77 for the protein in the combination of alfalfa and corn. In an experiment with 3 lambs, alfalfa hay fed with no addition of starch and sugar gave biological values averaging 50, whereas after the addition of starch and sugar to the ration, the biological value was 72. These results indicate the influence which the energy content and the plane of protein intake of the ration may have on the biological value of protein; they also show that values obtained may depend upon the method of experimentation used for their determination. These experiments show that alfalfa hay is probably not deficient in quality of protein for sheep when fed in a balanced ration. MenosAbstract: In nitrogen metabolism studies with five growing wether lambs, the digestibility, storage, and biological value of the proteins of alfalfa hay and clover hay, and of the proteins in the combination of each hay with corn, have been determined. These rations were equalized in energy content by the addition of cornstarch and canesugar in various amounts. The average coefficients of apparent digestibility of protein were 50 for clover hay, 56 for alfalfa hay, 55 for the clover and corn combination, and 63 for the combination of alfalfa and corn. These results are statistically significant in showing that the protein of alfalfa is more digestible than that of clover and that the protein of the combination of each hay with corn has a higher digestibility than the protein of either hay when fed as the only source of protein. If allowance is made for the metabolic fecal nitrogen and the true digestibility of the ingested protein calculated, the same relative differences in digestibility were also shown. No marked differences were observed in the percentage of protein stored from the different rations. However, the difference in the protein storage from the combination of alfalfa and corn and the storage either from the alfalfa-hay or the clover-hay ration, were sufficient to indicate that these differences were possibly significant from a statistical standpoint. Very little difference was found in the efficiency with which the different proteins were utilized for growth an... Mostrar Tudo |
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Thesagro: |
Feno; Nutrição; Valor Nutritivo. |
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Thesaurus Nal: |
Alfalfa hay; Lambs; Nitrogen metabolism; Ruminant nutrition; Sheep. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 03080naa a2200241 a 4500
001 1519577
005 2023-04-28
008 1934 bl uuuu u00u1 u #d
100 1 $aTURK, K. L.
245 $aThe nutritive value of the proteins of alfalfa hay and clover haw when fed alone in combination with proteins of corn.$h[electronic resource]
260 $c1934
520 $aAbstract: In nitrogen metabolism studies with five growing wether lambs, the digestibility, storage, and biological value of the proteins of alfalfa hay and clover hay, and of the proteins in the combination of each hay with corn, have been determined. These rations were equalized in energy content by the addition of cornstarch and canesugar in various amounts. The average coefficients of apparent digestibility of protein were 50 for clover hay, 56 for alfalfa hay, 55 for the clover and corn combination, and 63 for the combination of alfalfa and corn. These results are statistically significant in showing that the protein of alfalfa is more digestible than that of clover and that the protein of the combination of each hay with corn has a higher digestibility than the protein of either hay when fed as the only source of protein. If allowance is made for the metabolic fecal nitrogen and the true digestibility of the ingested protein calculated, the same relative differences in digestibility were also shown. No marked differences were observed in the percentage of protein stored from the different rations. However, the difference in the protein storage from the combination of alfalfa and corn and the storage either from the alfalfa-hay or the clover-hay ration, were sufficient to indicate that these differences were possibly significant from a statistical standpoint. Very little difference was found in the efficiency with which the different proteins were utilized for growth and maintenance, as measured by the biological value. The average of the biological values was 81 for clover protein, 79 for alfalfa protein, 80 for the protein in the combination of clover and corn, and 77 for the protein in the combination of alfalfa and corn. In an experiment with 3 lambs, alfalfa hay fed with no addition of starch and sugar gave biological values averaging 50, whereas after the addition of starch and sugar to the ration, the biological value was 72. These results indicate the influence which the energy content and the plane of protein intake of the ration may have on the biological value of protein; they also show that values obtained may depend upon the method of experimentation used for their determination. These experiments show that alfalfa hay is probably not deficient in quality of protein for sheep when fed in a balanced ration.
650 $aAlfalfa hay
650 $aLambs
650 $aNitrogen metabolism
650 $aRuminant nutrition
650 $aSheep
650 $aFeno
650 $aNutrição
650 $aValor Nutritivo
700 1 $aMORRISON, F. B.
700 1 $aMAYNARD, L. A.
773 $tJournal Agricultural Research$gv. 48, n. 6, p. 555-570, Mar. 1934.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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