Effects of Dietary Phosphorus Level on Determination of Standardized Ileal and Total Tract Digestibility of Phosphorus for Fattening Pigs

LIU Zhengqun; LYU Shuaibing; XIE Jingjing; ZHANG Zuxiang; LIU Jingbo; ZHANG Hongfu

doi:10.3969/j.issn.1006-267x.2016.05.011

2016 , Vol. 28 >Issue 5: 1361 - 1368

DOI: https://doi.org/10.3969/j.issn.1006-267x.2016.05.011

SWINE NUTRITION

Effects of Dietary Phosphorus Level on Determination of Standardized Ileal and Total Tract Digestibility of Phosphorus for Fattening Pigs

LIU Zhengqun ,
LYU Shuaibing ,
XIE Jingjing ,
ZHANG Zuxiang ,
LIU Jingbo ,
ZHANG Hongfu

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

Received date: 2015-11-29

Online published: 2016-05-24

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Abstract

The present study was conducted to investigate the effects of dietary phosphorus (P) level on the determination of standardized ileal digestibility (SID) and standardized total tract digestibility (STTD) of P for fattening pigs. Eighteen fattening pigs with the average body weight of (73.8±3.3) kg were surgically fitted with simple T-cannulas at the distal ileum. According to an incomplete Latin square design duplicated 9×4, nine diets and four periods were used in this experiment. The 9 experimental diets consisted of one P-free diet (PFD), six semi-purified diets and 2 mixed diets. PFD was used to estimate the basal endogenous P losses (EPL), while other diets were used to determine P digestibility. Chromic oxide was included in diets to determine EPL and P digestibility. The results showed as follows:1) dietary type extremely significantly affected ileal P output, apparent ileal digestibility (AID) and SID of P for fattening pigs (P<0.01). Dietary P level extremely significantly affected ileal P output (P<0.01), but had no significant influences on AID and SID of P for fattening pigs (P>0.05). The interaction of dietary type and dietary P level extremely significantly affected ileal P output, AID and SID of P for fattening pigs (P<0.01). 2) Dietary type extremely significantly affected total tract P output, apparent total tract digestibility (ATTD) and STTD of P for fattening pigs (P<0.01). Dietary P level extremely significantly affected total tract output and ATTD of P (P<0.01), but had no significant influence on STTD of P for fattening pigs (P>0.05). The interaction of dietary type and dietary P level significantly affected total tract output (P<0.01) and ATTD of P (P<0.05), but had no significant influence on STTD of P for fattening pigs (P>0.05). In conclusion, under the condition of this experiment, dietary P level has no significant influence on the determination of AID, SID and STTD of P for fattening pigs. However, dietary P level significantly affects the determination of ATTD of P for fattening pigs. Therefore, experimental diets with different dietary P levels can be formulated when STTD is used for determining the efficiency of P in feed ingredients of pigs.

Key words： fattening pigs; phosphorus; apparent digestibility; standardized digestibility

Cite this article

LIU Zhengqun , LYU Shuaibing , XIE Jingjing , ZHANG Zuxiang , LIU Jingbo , ZHANG Hongfu . Effects of Dietary Phosphorus Level on Determination of Standardized Ileal and Total Tract Digestibility of Phosphorus for Fattening Pigs[J]. Chinese Journal of Animal Nutrition, 2016 , 28(5) : 1361 -1368 . DOI: 10.3969/j.issn.1006-267x.2016.05.011

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