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Effects of Xylanase Supplementation in Diets with Corn Replaced by Wheat on Growth Performance, Intestinal Microbiota and Nitrogen Emissions of Growing Pigs

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  • 1. Zhejiang Crown Technology Company, Hangzhou 310058, China;
    2. Institute of Feed Science, Zhejiang University, Hangzhou 310058, China

Received date: 2014-03-14

  Online published: 2014-09-10

Abstract

This experiment was conducted to investigate the effects of xylanase supplementation in diets with corn replaced by wheat on growth performance, intestinal microbiota and nitrogen emissions of growing pigs. A total of 126 growing pigs (Duroc×Landrace×Yorkshire) with an average body weight of 45 kg were allotted to 7 groups with 3 replicates in each group and 6 pigs in each replicate. The groups were control group (CON group, corn-soybean meal-based diet), W20 group (20% wheat-based diet), W20X group (20% wheat-based diet+200 U/kg xylanase), W40 group (40% wheat-based diet), W40X group (40% wheat-based diet+200 U/kg xylanase), W60 group (60% wheat-based diet), and W60X group (60% wheat-based diet+200 U/kg xylanase), respectively. The experiment lasted for 50 d. The results showed as follows: compared with the control group, the average daily gain was significantly reduced (P<0.05), and feed to gain ratio was significantly increased (P<0.05), and the number of Clostridium and Escherichia coli in colonic and fecal nitrogen emission were significantly increased in W60 group (P<0.05); the average daily gain and feed to gain ratio were not significantly different between W20X group and W40X group (P>0.05); the number of Lactobacillus was significantly increased (P<0.05), the number of Clostridium and Escherichia coli was significantly decreased (P<0.05), and fecal pH and urease activity were significantly decreased in W40X group (P<0.05). In conclusion, the supplementation of xylanase in wheat-based diet can stimulate the proliferation of intestinal beneficial bacterium, and decrease nitrogen excretion. Results also indicate that the optimal replacement level of wheat is 40% in 200 U/kg xylanase diets for growing pigs.

Cite this article

HU Xiangdong, JIAO Lefei, LI Xubin, LOU Mengxi, HU Caihong . Effects of Xylanase Supplementation in Diets with Corn Replaced by Wheat on Growth Performance, Intestinal Microbiota and Nitrogen Emissions of Growing Pigs[J]. Chinese Journal of Animal Nutrition, 2014 , 26(9) : 2805 -2813 . DOI: 10.3969/j.issn.1006-267x.2014.09.044

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