Effect of L- or DL-methionine supplementation on nitrogen retention, serum amino acid concentrations and blood metabolites profile in starter pigs

Q. Y. Tian, Z. K. Zeng, Y. X. Zhang, S. F. Long, X. S. Piao

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

The objective of the current study was to evaluate the effect of supplementation of either L-methionine (L-Met) or DL-methionine (DL-Met) to diets of starter pigs on nitrogen (N) balance, metabolism, and serum amino acid profile. Eighteen crossbred (Duroc×Landrace×Yorkshire) barrows weighing 15.45±0.88 kg were randomly allotted to 1 of 3 diets with 6 pigs per treatment. The diets included a basal diet (Met-deficient diet) containing 0.24% standardized ileal digestibility Met with all other essential nutrients meeting the pig's requirements. The other two diets were produced by supplementing the basal diet with 0.12% DL-Met or L-Met. The experiment lasted for 18 days, consisting of a 13-day adaptation period to the diets followed by a 5-day experimental period. Pigs were fed ad libitum and free access to water throughout the experiment. Results showed that the supplementation of either L-Met or DL-Met improved N retention, and serum methionine concentration, and decreased N excretion compared with basal diet (p<0.01). The N retention of pigs fed diets supplemented with the same inclusion levels of DL-Met or L-Met were not different (p>0.05). In conclusion, on equimolar basis DL-Met and L-Met are equally bioavailable as Met sources for starter pigs.

Original languageEnglish (US)
Pages (from-to)689-694
Number of pages6
JournalAsian-Australasian Journal of Animal Sciences
Volume29
Issue number5
DOIs
StatePublished - May 2016

Bibliographical note

Funding Information:
The study was financially supported by the National Natural Science Foundation of China (No. 31372316) and CJ Corporation, Seoul, Korea.

Publisher Copyright:
Copyright © 2016 by Asian-Australasian Journal of Animal Sciences.

Keywords

  • Amino acids profile
  • Methionine
  • Nitrogen balance
  • Pigs

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