Effects of Phytase Supplementation in a Low-Phosphorus Diet on Growth Performance, Nutrient Apparent Digestibility and Bone Development of Weaned Piglets

ZHANG Junhao, LUO Junqiu, YU Bing, HE Jun, HUANG Zhiqing, MAO Xiangbing, ZHENG Ping, YU Jie, YU Guixiang, LIU Jie, WANG Quyuan, WANG Huifen, ZENG Zhu, CHEN Daiwen

doi:10.3969/j.issn.1006-267x.2015.10.032

2015 , Vol. 27 >Issue 10: 3241 - 3248

DOI: https://doi.org/10.3969/j.issn.1006-267x.2015.10.032

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Effects of Phytase Supplementation in a Low-Phosphorus Diet on Growth Performance, Nutrient Apparent Digestibility and Bone Development of Weaned Piglets

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Key Laboratory for Animal Disease-Resistance Nutrition of Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu 611130, China

Received date: 2015-05-12

Online published: 2015-10-15

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Abstract

This study was conducted to investigate the effects of phytase supplementation in a low-phosphorus (P) diet on growth performance, nutrient apparent digestibility and bone development of weaned piglets.Thirty-five healthy crossbred piglets (Duroc×Landrace×Large) with an initial average body weight of (7.62±0.44) kg, which were weaned at age of 21 days, were randomly allotted to 5 groups with 7 replicates per group and 1 piglet per replicate.The piglets in control group was fed a basal diet only, and the piglets in experimental groups were fed the low-P diet [pre-starter: calcium (Ca) 5.1 g/kg, available phosphorus (AP) 2.0 g/kg; starter: Ca 4.6 g/kg, AP 1.6 g/kg] supplemented with 0, 250, 500, 1 000 FTU/kg phytase, respecatively.The whole trial lasted for 21 days.The results showed as follows: 1) compared with control group, supplementation with 1 000 FTU/kg phytase significantly increased average daily feed intake and average daily gain of weaned piglets from day 15 to day 21 and day 1 to day 21 (P<0.05), but there was no significantly affect on feed to gain ratio (P>0.05).2) Compared with control group and low-P diet group, phytase supplementation significantly increased the apparent digestibility of dry matter, organic matter, crude protein, Ca, P and total energy (P<0.05), with 1 000 FTU/kg phytase supplementation was the highest.3) Compared with control group, supplemented with 1 000 FTU/kg phytase significantly increased the length of third metacarpal bone (P<0.05).In conclusion, supplementation of phytase in corn-soybean meal low-P diet (AP 1.6 to 2.0 g/kg) can improve the apparent digestibility of nutrients, enhance the growth performance and bone development of weaned piglets, decrease feed economic costs, and the optimum supplementary amount of phytase is 1 000 FTU/kg.

Key words： phytase; low-P diets; growth performance; nutrient apparent digestibility; bone development

Cite this article

ZHANG Junhao, LUO Junqiu, YU Bing, HE Jun, HUANG Zhiqing, MAO Xiangbing, ZHENG Ping, YU Jie, YU Guixiang, LIU Jie, WANG Quyuan, WANG Huifen, ZENG Zhu, CHEN Daiwen . Effects of Phytase Supplementation in a Low-Phosphorus Diet on Growth Performance, Nutrient Apparent Digestibility and Bone Development of Weaned Piglets[J]. Chinese Journal of Animal Nutrition, 2015 , 27(10) : 3241 -3248 . DOI: 10.3969/j.issn.1006-267x.2015.10.032

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