Effects of Low Trace Element and Low Phosphorus Phytase Diets on Growth Performance, Meat Quality and Fecal Heavy Metal Content of Finishing Pigs

  • WANG Zhikang ,
  • XIONG Yunxia ,
  • HOU Lei ,
  • WU Qiwen ,
  • ZHU Cui ,
  • YANG Xuefen ,
  • WANG Li ,
  • JIANG Zongyong
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  • Guangdong Key Laboratory of Animal Breeding and Nutrition, Lingnan Modern Agricultural Science and Technology Maoming Sub-Center of Guangdong Provincial Laboratory, State Key Laboratory of Livestock and Poultry Breeding, Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China

Received date: 2021-09-11

  Online published: 2022-04-14

Abstract

The aim of this study was to investigate the effects of different proportions of element in low phosphorus phytase diets on the growth performance, meat quality and fecal heavy metal content of finishing pigs. Sixty finishing pigs (Duroc×Landrace×Yorkshire) with an average body weight of (131.45±0.45) kg were randomly divided into 3 groups:control group, experimental group Ⅰ and experimental group Ⅱ, with 5 replicates per group and 4 pigs per replicate, half male and half female. The control group was fed a corn-soybean meal based diet with 0.35% total phosphorus content and 0.06% trace element premix. The experimental group was fed a low P diet supplemented with phytase, with 0.24% total P and 1 000 U/kg phytase activity; experimental group Ⅰ added 0.03% trace element premix, experimental group Ⅱ did not add trace element premix. The results showed as follows:compared with the control group, there were no significant differences in growth performance, antioxidant activity, serum calcium (Ca) content, meat quality indices and intestinal morphology in experimental groups Ⅰ and Ⅱ (P>0.05); but the serum phosphorus content in group Ⅰ was increased by 12.87% (P<0.05), dry matter apparent digestibility of experimental groups Ⅰ and Ⅱ was increased by 2.88% and 2.31%, respectively (P<0.01). The fecal ash, phosphorus (P),copper (Cu) and zinc (Zn) contents in experimental groups Ⅰ and Ⅱ were significantly decreased (P<0.01), the ash contents was decreased by 12.71% and 10.46%, P contents were decreased by 27.86% and 19.85%, Cu contents were decreased by 26.08% and 53.51%, Zn contents were decreased by 40.21% and 72.58%. Compared with experimental group Ⅰ, experimental group Ⅱ significantly reduced fecal Cu and Zn contents(P<0.05), but there were no significant differences in growth performance, meat quality, intestinal morphology, antioxidant activity and nutrient apparent digestibility (P>0.05). In conclusion, finishing pigs fed low phosphorus phytase diet with reduced trace element supplemental level can significantly improve nutrient digestibility and effectively reduce the contents of P, Cu and Zn in feces, without affecting the growth performance and meat quality of finishing pigs.

Cite this article

WANG Zhikang , XIONG Yunxia , HOU Lei , WU Qiwen , ZHU Cui , YANG Xuefen , WANG Li , JIANG Zongyong . Effects of Low Trace Element and Low Phosphorus Phytase Diets on Growth Performance, Meat Quality and Fecal Heavy Metal Content of Finishing Pigs[J]. Chinese Journal of Animal Nutrition, 2022 , 34(4) : 2196 -2207 . DOI: 10.3969/j.issn.1006-267x.2022.04.016

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