Effects of New Heat-Resistant Phytase on Growth Performance and Small Intestinal Mucosa Morphology Structure of Weaner Piglets

CAO Guibin, YU Huimin, YOU Jinming, WEI Qipeng, ZOU Zhiheng, XIN Xiangrong

doi:10.3969/j.issn.1006-267x.2014.09.045

2014 , Vol. 26 >Issue 9: 2814 - 2821

DOI: https://doi.org/10.3969/j.issn.1006-267x.2014.09.045

Short Communications

Effects of New Heat-Resistant Phytase on Growth Performance and Small Intestinal Mucosa Morphology Structure of Weaner Piglets

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1. College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China;
2. Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
3. Institute of Animal Science, Jiangxi Academy of Agricultural Sciences, Nanchang 330200, China

Received date: 2014-03-11

Online published: 2014-09-10

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Abstract

This experiment was conducted to study the effects of new heat-resistant phytase (NHP) in the low phosphors diet on growth performance and small intestinal mucosa morphology structure of weaner piglets. A total of 256 piglets weaned at 30 days of age with the same genetic background and with the body weight of (8.37±0.97) kg were randomly allotted to 4 treatments with 4 replicates of 16 piglets using a randomized complete-block design. They were fed a basal diet, a low phosphorus diet, the low phosphorus diet+500 U/kg NHP and the low phosphorus diet+1 000 U/kg NHP, respectively. The experiment lasted for 30 d. The results showed as follows: 1) compared with low phosphorus diet, supplementation of 500 U/kg and 1 000 U/kg NHP improved average daily gain and decreased the feed/gain (P>0.05). 2) Compared with the low phosphorus diet group, ileum villus height in 500 U/kg NHP group, jejunum and ileum villus height in 1 000 U/kg NHP group were significantly increased (P<0.05), duodenum crypt depth in 1 000 U/kg NHP group was significantly decreased (P<0.05), and duodenum villus height/crypt in 1 000 U/kg NHP group was significantly increased (P<0.05). In conclusion, using NPH to reduce part of phosphors in weaner piglets' diet can reach the similar effect of basal diet on the growth performance, and can promote mucosal structure of small intestine of piglets to some degree. In addition, the supplement effect of NHP at 1 000 U/kg is better than that at 500 U/kg.

Key words： new heat-resistant phytase; piglets; growth performance; small intestinal mucosa morphology; inorganic phosphorus

Cite this article

CAO Guibin, YU Huimin, YOU Jinming, WEI Qipeng, ZOU Zhiheng, XIN Xiangrong . Effects of New Heat-Resistant Phytase on Growth Performance and Small Intestinal Mucosa Morphology Structure of Weaner Piglets[J]. Chinese Journal of Animal Nutrition, 2014 , 26(9) : 2814 -2821 . DOI: 10.3969/j.issn.1006-267x.2014.09.045

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