REVIEW

Effects of Isoacids on Ruminal Metabolism and Performance in Rumiants: A Review

  • ZHANG Zhenwei ,
  • ZHU Mingxia ,
  • WANG Changfa
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  • Liaocheng Research Institute of Donkey High-Efficiency Breeding and Ecological Feeding, Liaocheng University, Liaocheng 252000, China

Received date: 2021-06-23

  Online published: 2022-03-14

Abstract

Isoacids are the branched ketoacids resulting from the natural rumen fermentation of their corresponding amino acids. Isobutyric, isovaleric, 2-methylbutyric and valerate are produced in the rumen mainly by oxidative deamination and decarboxylation of the amino acids valine, leucine, isoleucine and proline, respectively. Isoacids are essential nutrients and enhance the growth of fiber-digesting microorganisms in the rumen, which results in more efficient feed utilization of fiber. More microbial protein will be produced when isoacids were added in the diets. Besides, the supplementation of isoacids can potentially increase the utilization of nonprotein nitrogen by inhibiting the activity of urease. The increase of nitrogen retention will ultimately promote body weight gain in ruminants. In addition, isoacids have a favorable response on rumen acetate production, which making more energy available for increased milk production and milk fat rate. The objective of the present paper was to elucidate the effects of isoacids on ruminal metabolism, milk yield, weight gain and other performance in ruminants to provide a scientific reference in further practical usage of isoacids.

Cite this article

ZHANG Zhenwei , ZHU Mingxia , WANG Changfa . Effects of Isoacids on Ruminal Metabolism and Performance in Rumiants: A Review[J]. Chinese Journal of Animal Nutrition, 2022 , 34(3) : 1408 -1415 . DOI: 10.3969/j.issn.1006-267x.2022.03.005

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