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Titolo:
AMINO-ACID-METABOLISM IN RUMINANTS
Autore:
KUNG LM; RODE LM;
Indirizzi:
UNIV DELAWARE,DEPT ANIM SCI & AGR BIOCHEM NEWARK DE 19717 AGR CANADA,RES STN LETHBRIDGE AB T1J 4B1 CANADA
Titolo Testata:
Animal feed science and technology
fascicolo: 1-3, volume: 59, anno: 1996,
pagine: 167 - 172
SICI:
0377-8401(1996)59:1-3<167:AIR>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
PROTECTED METHIONINE; DIETARY-FAT; RUMEN; COWS;
Keywords:
RUMEN PROTECTED AMINO ACIDS; RUMEN BYPASS; NITROGEN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
17
Recensione:
Indirizzi per estratti:
Citazione:
L.M. Kung e L.M. Rode, "AMINO-ACID-METABOLISM IN RUMINANTS", Animal feed science and technology, 59(1-3), 1996, pp. 167-172

Abstract

All animals require amino acids (AA) which are the building blocks ofproteins required for optimal growth, reproduction, lactation, and maintenance. In ruminants, proteins and AA are first subject to microbial degradation in the rumen making it difficult to predict the quality and quantity of AA that are absorbed by the animal. In ruminants, absorbed AA comes from microbial protein synthesis in the rumen and from dietary amino acid sources that are undegraded in the rumen, Productionof microbial protein alone is insufficient to supply adequate amountsof amino acids for optimal production. In cattle, methionine and lysine are generally the first limiting AA for production. Improving the quality of absorbable AA can be accomplished through several means. Forexample, feeds can be chosen whose proteins are relatively resistant to rumen degradation. However, this does not ensure overcoming the limiting AA. A better method would be to predict which AA were limiting and then to supply these AA in a rumen protected form. The future of understanding requirements of AA for ruminants will rely on the ability of models to accurately predict the need for supplemental AA.

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Documento generato il 01/12/20 alle ore 07:31:58