Effects of Reducing Dietary Nitrogen or/and Phosphorus Contents with Compound Enzyme on Growth Performance, Nutrient Digestibility and Serum Biochemical Parameters of Growing Pigs

MAO Jiangdi, TANG Renlong, WANG Chong, WANG Haifeng

doi:10.3969/j.issn.1006-267x.2019.06.019

2019 , Vol. 31 >Issue 6: 2597 - 2604

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.06.019

Molecular Nutrition

Effects of Reducing Dietary Nitrogen or/and Phosphorus Contents with Compound Enzyme on Growth Performance, Nutrient Digestibility and Serum Biochemical Parameters of Growing Pigs

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1. College of Animal Sciences and Technology, Zhejiang A & F University, Hangzhou 311300, China;
2. College of Animal Sciences, Zhejiang University, Hangzhou 310058, China

Received date: 2018-11-28

Online published: 2019-06-17

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Abstract

This experiment was conducted to investigate the effects of reducing dietary nitrogen or/and phosphorus contents with compound enzyme on growth performance, nutrient digestibility and serum biochemical parameters of growing pigs. Ninety-six growing pigs with the body weight of (36.0±4.8) kg were randomly divided into four groups with three replicates in each group and eight pigs in each replicate. Pigs in those four groups were fed a normal diet without complex enzyme (CON group), a low nitrogen diet with compound enzyme (LN group), low phosphorus diet with complex enzyme (LP group) and low nitrogen and phosphorus diet with compound enzyme (LNP group), respectively. The feeding trial lasted for 37 days. There were no significant differences in average daily feed intake, average daily gain and feed/gain among four groups of growing pigs (P>0.05). The phosphorus digestibility of growing pigs in LP group and LNP group was significantly higher than that in CON group and LN group (P<0.05). The digestibility of cysteine (Cys), methionine (Met), tyrosine (Tyr) in LNP group was significantly higher than that in CON group (P<0.05), while the digestibility of other amino acids had no significant difference among four groups of growing pigs (P>0.05). The calcium content in serum of growing pigs in LP group and LN group was significantly higher than that in CON group and LP group (P<0.05), but there were no significant differences in serum total protein, phosphorus, urea nitrogen contents and alkaline phosphatase activity among four groups of growing pigs (P>0.05). The results indicate that appropriately reducing dietary phosphorus and nitrogen contents with complex enzyme will not affect the growth performance of growing pigs, and can improve the phosphorus utilization efficiency and reduce the nitrogen and phosphorus excretion in feces.

Key words： growing pigs; phosphorus; nitrogen; complex enzyme; growth performance; nutrient digestibility

Cite this article

MAO Jiangdi, TANG Renlong, WANG Chong, WANG Haifeng . Effects of Reducing Dietary Nitrogen or/and Phosphorus Contents with Compound Enzyme on Growth Performance, Nutrient Digestibility and Serum Biochemical Parameters of Growing Pigs[J]. Chinese Journal of Animal Nutrition, 2019 , 31(6) : 2597 -2604 . DOI: 10.3969/j.issn.1006-267x.2019.06.019

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