A 2×3 factorial design was conducted to study the effects of dietary xylan level and xylanase supplementation on growth performance, intestinal microbial metabolites and intestinal flora of weaned piglets. Tow main factors were xylanase supplementation (0 and 1 000 U/kg) and dietary xylan level (4.58%, 6.23% and 7.54%). Thirty cross-bred (Duroc×Landrace×Large white) weaned piglets at 28 days of age with the similar weight and genetic background were randomly allotted to 6 treatments with 5 replicates each and 1 piglet in each replicate. The experiment lasted for 14 days. The results showed that during the experimental period from 1 to 14 days, the supplementation of xylanase increased the average daily gain (P<0.05). The supplementation of xylanase tended to improve the acetate content of ileum digesta (P>0.05), and improved the total volatile fatty acid content of ileum digesta (P<0.05), reduced the ammonia content of caecum digeta (P<0.05), and increased the amount of Bifidobacterium in caecum digeta (P<0.05). When dietary xylan level was 7.54%, the most significant effect of xylanase supplementation was found in those indexes (P<0.05). However, dietary xylan level did not significantly affect those indexes. In conclusion, under the condition of this trial, the supplementation of xylanase can improve growth performance and intestinal microenvironment of weaned piglets. In addition, there is a dose-dependent relationship between xylanase supplementation and dietary xylan level.
YE Nan, CHEN Daiwen, MAO Xiangbing, HUANG Zhiqing, MAO Qian, CHEN Hong, HAN Guoquan, YU Bing
. Xylanase Supplementation of Diets Containing Different Levels of Xylan for Weaned Piglets: Effects on Growth Performance and Intestinal Microecology[J]. Chinese Journal of Animal Nutrition, 2011
, 23(11)
: 1961
-1969
.
DOI: 10.3969/j.issn.1006-267x.2011.11.017
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