Swine Nutrition

Effects of Standardized Ileal Digestible Valine Level on Growth Performance, Plasma Amino Acids and Urea Nitrogen Contents of Growing Pigs

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  • 1. Engineering Research Center for Feed Safety and Efficient Utilization of Ministry of Education, Hunan Agricultural University, Changsha 410128, China;
    2. Hunan Xinfazhan Agriculture and Animal Husbandry Technology Co., Ltd., Hengyang 421001, China

Received date: 2014-03-24

  Online published: 2014-08-13

Abstract

This experiment was conducted to investigate the effects of dietary standardized ileal digestible (SID) valine (Val) level on growth performance, plasma amino acids and urea nitrogen contents of growing pigs. This experiment was conducted to choose 420 barrows (Duroc×Landrace×Yorkshire) which were allotted to 5 treatments with 6 replicates per treatment and 14 barrows per replicate. Except dietary Val level, the nutrient levels of experimental diets were referred to recommended the nutrient requirements of swine in NRC (2012), therefore dietary SID Val levels were 0.59%, 0.64%, 0.69%, 0.74% and 0.79%, respectively. The results showed as follows: the average daily gain and feed to gain ratio of treatments with the dietary SID Val level at 0.69%, 0.74% and 0.79% were no significantly different (P>0.05), but were significantly improved when compared with the treatment with the dietary SID Val level at 0.59% (P<0.01). With the dietary SID Val level increased, the average daily gain and feed to gain ratio had linear and quadratic trend (P<0.01). With broken-line model and quadratic regression trend of the data from average daily gain and feed to gain ratio, this trial showed that the dietary SID Val requirement is 0.65% to 0.73% when the dietary SID Lys level is 0.98%, and the optimum SID Val level is 0.68% for 20 to 50 kg growing pigs.

Cite this article

YI Mengxia, YI Xuewu, HE Xi, CHEN Datu, HU Guanbo, ZHANG Shirui . Effects of Standardized Ileal Digestible Valine Level on Growth Performance, Plasma Amino Acids and Urea Nitrogen Contents of Growing Pigs[J]. Chinese Journal of Animal Nutrition, 2014 , 26(8) : 2085 -2092 . DOI: 10.3969/j.issn.1006-267x.2014.08.009

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