Feed Science and Technology

New Heat-Resistant Phytase:Effects on Calcium and Phosphorus Metabolism and Apparent Nutrient Digestibility of Weaner Piglets

  • CAO Guibin ,
  • XIONG Hao ,
  • YOU Jinming ,
  • YU Huimin ,
  • WEI Qipeng ,
  • ZOU Zhiheng ,
  • YE Yaling
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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: 2014-02-23

  Online published: 2014-07-01

Abstract

This experiment was conducted to study the effects of new heat-resistant phytase (NHP) on the metabolism of calcium (Ca) and phosphorus (P) and apparent nutrient digestibility in weaner piglets by replacing part of calcium hydro phosphate by NHP in low-phosphorus diet. A total of 256 piglets weaned at 30 days of age and with the similar genetic background were randomly allotted to 4 treatments with 4 replicates per treatment and 16 piglets per replicate using a randomized complete-block design. They were fed basal diet, low-phosphorus diet, low-phosphorus diet+500 U/kg NHP, and low-phosphorus diet+1 000 U/kg NHP, respectively. The experiment lasted for 30 d. The results showed as follows: 1) there was no significant difference in serum Ca and P contents and alkaline phosphatase (ALP) activity among all treatments (P>0.05). However, serum Ca and P in the NHP treatments had tendencies of going upward. 2) Compared with low-phosphorus diet, the supplementation of 500 or 1 000 U/kg NHP improved Ca and P contents and ash ratio in coffin bone, but there were no differences among all treatments (P>0.05). 3) The phalanx section of piglets fed the diets supplemented with NHP showeded thicker compact bone and higher cancellous bone than those in basal diet group and low-phosphorus diet group. 4) The apparent digestibility of gross energy (GE), Ca, total phosphorus (TP), and dry matter (DM) in basal diet group, 500 U/kg NHP group and 1 000 U/kg NHP group were higher than those in basal diet group and low-phosphorus diet group (P<0.05). In conclusion, by using NPH to replace part of P in diets can improve the metabolism of Ca and P in piglets as well as the apparent digestibility of some nutrients. In addition, 1 000 U/kg NHP is an appropriate choice to replace phosphorus in diet.

Cite this article

CAO Guibin , XIONG Hao , YOU Jinming , YU Huimin , WEI Qipeng , ZOU Zhiheng , YE Yaling . New Heat-Resistant Phytase:Effects on Calcium and Phosphorus Metabolism and Apparent Nutrient Digestibility of Weaner Piglets[J]. Chinese Journal of Animal Nutrition, 2014 , 26(7) : 1900 -1907 . DOI: 10.3969/j.issn.1006-267x.2014.07.023

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