数字农科院2.0

Estimation of standardized phosphorus retention for inorganic phosphate sources in broilers

文献类型： 外文期刊

作者： Liu, S. B.;Xie, J. J.;Lu, L.;Li, S. F.;Zhang, L. Y.;Jiang, Y.;Luo, X. G.;Liu, S. B.;Li, S. F.

作者机构：

关键词： broiler;dicalcium phosphate;monocalcium phosphate;monopotassium phosphate;standardized phosphorus retention

期刊名称： JOURNAL OF ANIMAL SCIENCE

ISSN： 0021-8812

年卷期： 2013 年 91 卷 8 期

页码：

收录情况： SCI

摘要： Two experiments were conducted to estimate standardized P retention (SPR) values of dicalcium phosphate (DCP), monocalcium phosphate (MCP), and monopotassium phosphate (MKP) in broilers. In total, ninety-six 22-d-old male broilers with similar BW (780 g average) were used in each experiment. The chicks were randomly allotted to 1 of 4 treatments (P-free, DCP, MCP, or MKP diets) with 6 replicate cages of 4 chicks each in a completely randomized design. After 3-d acclimation, chicks were fasted for 24 h and then fed P-free, DCP, MCP, or MKP diets for 4 h in Exp. 1 or 72 h in Exp. 2. Excreta samples were collected for a total of 28 or 52 h (24 or 48 h after feed withdrawal) in Exp. 1 and 96 or 120 h (24 or 48 h after feed withdrawal) in Exp. 2, respectively. The excreta collection time of 52 h in Exp. 1 or 96 h in Exp. 2 was adequate for the estimation of SPR. The estimated basal endogenous P losses (EPL) in chicks fed the P-free diet were 109 +/- 4 mg/52 h per bird and 49.2 +/- 4.0 mg/96 h per bird in Exp. 1 and 2, respectively. The SPR values of inorganic phosphate sources corrected by the above basal EPL differed (P < 0.001) in Exp. 2 but not in Exp. 1. However, these SPR values were very similar between the 2 experiments with 68.7, 69.8, or 76.6% in Exp. 1 and 71.8, 70.6, or 78.3% in Exp. 2 for DCP, MCP, or MKP, respectively. The results from the current study indicated that, compared with the 72-h feeding and 96-h excreta collection procedure, the 4-h feeding and 52-h excreta collection procedure was a relatively quicker time- and labor-saving method for estimating the SPR values of inorganic P sources in broilers. The estimated SPR values of commonly used inorganic P sources (MCP and DCP) were about 70%.

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