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Registro Completo |
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Biblioteca(s): |
Embrapa Tabuleiros Costeiros. |
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Data corrente: |
10/09/1998 |
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Data da última atualização: |
10/09/1998 |
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Autoria: |
WOODWARD, A.; REED, J. D. |
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Título: |
Nitrogen metabolism of sheep and goats consuming acacia brevispica and sesbania sesban |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
Journal of Animal Science, v.75, n.4, p.1130-1139, 1997. |
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ISSN: |
0021-8812 |
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Idioma: |
Inglês |
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Conteúdo: |
We described the effects of two east African browses, Acacia brevispica and Sesbania sesban, on nitrogen metabolism of sheep and goats. The A. brevispica had a substantial amount of proanthocyanidins(condensed tannis); S. sesban did not. The browses were fed at three levels in combination with vetch(Vicia dasycarpa) and teff straw(Eragrostis abyssinica). Fecal N, N balance, and plasma urea N (PUN) were estimated withintact animals. Ruminal ammonia(RuA) and VFA concentrations were estimated with ruminally fistulated animals. Urinary N loss, PUN, RuA, and VFA concentrations were higher for S. sesban diets than for A. brevispica diets. Fecal N was highest with diets including A. brevispica due to high levels of fecal neutral-detergent insoluble N. Nitrogen retention was adequate for A. brevispica diets including S.sesban. Nitrogen retention was highest for diets including S.sesban. Nitrogen retentionwas adequate for A.brevispica diets because low urinary N compensated for high fecal N.four hypotheses describe possible effects of tannis on N metabolism:1) escape of protein from the rumen to the lower tracr; 2)increased microbial yield; 3) increase in N-containing endogenous products; and 4)protein made indigestible in tannin-protein complexes. The effect of tannins ain A. brevispica on N metabolism can best be described by the formation of indigestible tannin-protein complexes,,although increased production of endogenous products is also possible. |
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Palavras-Chave: |
Acacia brevispica. |
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Thesaurus Nal: |
goats; nitrogen metabolism; proanthocyanidins; Sesbania sesban; sheep. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02066naa a2200217 a 4500
001 1354709
005 1998-09-10
008 1997 bl uuuu u00u1 u #d
022 $a0021-8812
100 1 $aWOODWARD, A.
245 $aNitrogen metabolism of sheep and goats consuming acacia brevispica and sesbania sesban
260 $c1997
520 $aWe described the effects of two east African browses, Acacia brevispica and Sesbania sesban, on nitrogen metabolism of sheep and goats. The A. brevispica had a substantial amount of proanthocyanidins(condensed tannis); S. sesban did not. The browses were fed at three levels in combination with vetch(Vicia dasycarpa) and teff straw(Eragrostis abyssinica). Fecal N, N balance, and plasma urea N (PUN) were estimated withintact animals. Ruminal ammonia(RuA) and VFA concentrations were estimated with ruminally fistulated animals. Urinary N loss, PUN, RuA, and VFA concentrations were higher for S. sesban diets than for A. brevispica diets. Fecal N was highest with diets including A. brevispica due to high levels of fecal neutral-detergent insoluble N. Nitrogen retention was adequate for A. brevispica diets including S.sesban. Nitrogen retention was highest for diets including S.sesban. Nitrogen retentionwas adequate for A.brevispica diets because low urinary N compensated for high fecal N.four hypotheses describe possible effects of tannis on N metabolism:1) escape of protein from the rumen to the lower tracr; 2)increased microbial yield; 3) increase in N-containing endogenous products; and 4)protein made indigestible in tannin-protein complexes. The effect of tannins ain A. brevispica on N metabolism can best be described by the formation of indigestible tannin-protein complexes,,although increased production of endogenous products is also possible.
650 $agoats
650 $anitrogen metabolism
650 $aproanthocyanidins
650 $aSesbania sesban
650 $asheep
653 $aAcacia brevispica
700 1 $aREED, J. D.
773 $tJournal of Animal Science$gv.75, n.4, p.1130-1139, 1997.
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Embrapa Tabuleiros Costeiros (CPATC) |
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