Dietary sources of phosphorus affect postileal phosphorus digestion in growing pigs

文献类型： 外文期刊

第一作者： Liu, J. B.

作者： Liu, J. B.;Zhai, H. X.;Chen, L.;Zhang, H. F.;Liu, J. B.;Shen, X. Y.

作者机构：

关键词： ileal digestibility;phosphorus;pig;postileal digestibility;total tract digestibility

期刊名称：JOURNAL OF ANIMAL SCIENCE （ 影响因子：3.159； 五年影响因子：2.912 ）

ISSN： 0021-8812

年卷期： 2017 年 95 卷 10 期

页码：

收录情况： SCI

摘要： The present study was conducted to investigate the postileal P digestion response of growing pigs to dietary P concentrations and sources. Twenty-four pigs (57.3 +/- 1.9 kg initial BW) fitted with T-cannulas at the distal ileum were assigned to a duplicated 12 x 4 incomplete Latin square design with 12 diets and 4 periods. The 12 experimental diets consisted of 9 cornstarch-based diets using soybean meal (SBM), corn distiller's dried grains with solubles (DDGS), and canola meal (CM) as assay ingredients at 3 levels and 3 corn-SBM-based practical diets with 3 levels of dicalcium phosphate (DCP). Chromic oxide was included as an indigestible marker to calculate apparent ileal digestibility (AID), apparent total tract digestibility (ATTD), and apparent postileal digestibility (APID) of P. Each period consisted of 5 d of adaption period, 2 d of fecal samples collection, and 2 d of ileal digesta collection. The results showed that ileal P output, fecal P output, ileal digested P, total tract digested P, and the AID and ATTD of P were affected by the interaction of P concentrations and sources (P < 0.01). When pigs were fed the semipurified diets containing SBM and corn-SBM-based practical diets, the AID and ATTD of P increased with increasing dietary P level (linear, P < 0.01). However, there were no linear or quadratic responses in the AID and ATTD of P for pigs fed diets containing increasing levels of CM and corn DDGS. Postileal digested P, the proportion of ileal digested P to total tract digested P, the proportion of postileal digested P to total tract digested P, APID of P, and hindgut disappearance of P were affected by dietary sources of P (P < 0.01). When pigs were fed the semipurified diets containing SBM and CM, there were no differences between the AID and ATTD of P. In contrast, the ATTD of P were greater than the AID of P for pigs fed diets containing corn DDGS and corn-SBM-based practical diets with DCP supplementation. In summary, postileal P digestion response of growing pigs was affected by dietary P sources.

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