Effects of Basal Diet Composition on True Total Tract Digestibility of Phosphorus in Dicalcium Phosphate and Monocalcium Phosphate for Growing Pigs

LIU Zhengqun; ZHANG Zuxiang; CHEN Liang; LIU Jingbo; ZHANG Hongfu

doi:10.3969/j.issn.1006-267x.2016.08.026

2016 , Vol. 28 >Issue 8: 2542 - 2550

DOI: https://doi.org/10.3969/j.issn.1006-267x.2016.08.026

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Effects of Basal Diet Composition on True Total Tract Digestibility of Phosphorus in Dicalcium Phosphate and Monocalcium Phosphate for Growing Pigs

LIU Zhengqun ,
ZHANG Zuxiang ,
CHEN Liang ,
LIU Jingbo ,
ZHANG Hongfu

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1. State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
2. School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China

Received date: 2016-02-29

Online published: 2016-08-17

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Abstract

Two experiments were conducted to investigate the effects of basal diet composition on the determination of true total tract digestibility (TTTD) of phosphorus (P) in dicalcium phosphate (DCP) and monocalcium phosphate (MCP) for growing pigs. In experiment 1, ten growing pigs with (30.4±1.8) kg average body weight (BW) were fed 5 DCP supplemental levels of corn soybean meal (CSBM) diets and 5 DCP supplemental levels of wheat soybean meal (WSBM) diets in a 10×8 incomplete Latin square design. In experiment 2, ten growing pigs with (30.9±1.5) kg average BW were fed 5 MCP supplemental levels of CSBM diets and 5 MCP supplemental levels of WSBM diets in a 10×8 incomplete Latin square design. Each experiment contained eight digestion periods and each period lasted for 7 days (5 days for adaptation and 2 days for fecal sample collection). The results showed as follows:1) total tract P output in the CSBM diets was significant higher than that in the WSBM diets (P<0.01), while the total tract digestible P content and apparent total tract digestibility (ATTD) of P in the CSBM diets were higher than those in the WSBM diets (P<0.01). The total tract P output, total tract digestible P content and ATTD of P linearly increased as P from DCP or MCP added to the diet (P<0.01). 2) By using the linear regression method, the estimated true total tract digestibility (TTTD) of P in DCP for pigs fed CSBM and WSBM diet to be 82.33% and 82.88%, respectively. The TTTD of P in MCP for pigs fed CSBM and WSBM diet to be 85.88% and 84.62%, respectively. In conclusion, the TTTD of P in DCP or MCP for growing pigs is not affected by basal diet composition.

Key words： phosphorus; basal diet; growing pigs; true total tract digestibility; dicalcium phosphate; monocalcium phosphate

Cite this article

LIU Zhengqun , ZHANG Zuxiang , CHEN Liang , LIU Jingbo , ZHANG Hongfu . Effects of Basal Diet Composition on True Total Tract Digestibility of Phosphorus in Dicalcium Phosphate and Monocalcium Phosphate for Growing Pigs[J]. Chinese Journal of Animal Nutrition, 2016 , 28(8) : 2542 -2550 . DOI: 10.3969/j.issn.1006-267x.2016.08.026

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