评价饲用磷酸盐在肉鸡和北京鸭中的回肠磷消化率和磷排泄留存率。
Evaluation of the ileal digestibility and excreta retention of phosphorus for feed phosphates in broiler chickens and in Pekin ducks.
机构信息
Institute of Animal Nutrition, Key Laboratory for Animal Disease-Resistance Nutrition of China, Ministry of Education, Sichuan Agricultural University, Chengdu, 611130, China.
Department of Poultry Science, University of Georgia, GA, 30602, USA.
出版信息
Poult Sci. 2022 Jul;101(7):101837. doi: 10.1016/j.psj.2022.101837. Epub 2022 Mar 10.
The study aimed to determine the ileal phosphorus (P) digestibility (iPD) and the excreta P retention (ePR) of 5 monodicalcium phosphate (MCP) samples and 3 dicalcium phosphate (DCP) samples in broiler chickens and in Pekin ducks using the substitution method. A total of 720, 21-d-old Arbor Acres broiler chickens in experiment 1 and 720, 15-d-old Pekin ducks in experiment 2 were randomly allocated to 9 dietary treatments with 8 replicate cages (10 birds/cage) based on the similar mean body weight, respectively. The collection of excreta (for 72 h after a 3-d acclimation) and ileal digesta (after 6 d of feeding experimental diets) was done. The results showed the average iPD/ePR of MCP and DCP for broilers were 83.11%/74.52% and 75.34%/69.46% and for ducks were 79.37%/80.02% and 75.74%/76.44%, respectively. The iPD/ePR of MCP in broilers and the ePR of MCP in ducks were markedly higher (P < 0.05) than those of DCP. Our data suggest that using the substitution method to evaluate the bioavailability of feed phosphates has its own advantages; MCP has higher biological availability than DCP for broilers and ducks.
本研究旨在采用替代法测定 5 种单磷酸钙（MCP）和 3 种二磷酸钙（DCP）在肉鸡和北京鸭体内的回肠磷消化率（iPD）和粪便磷保留率（ePR）。试验 1 中，选用 720 只 21 日龄的爱拔益加肉鸡，试验 2 中选用 720 只 15 日龄的北京鸭，根据相似的平均体重，分别随机分配到 9 种饲粮处理组，每组 8 个重复，每个重复 10 只鸡/笼。收集粪便（适应期 3d 后收集 72h）和回肠食糜（饲喂试验饲粮 6d 后收集）。结果表明，肉鸡的 MCP 和 DCP 的平均 iPD/ePR 分别为 83.11%/74.52%和 75.34%/69.46%，鸭的 MCP 和 DCP 的平均 iPD/ePR 分别为 79.37%/80.02%和 75.74%/76.44%。肉鸡的 MCP 的 iPD/ePR 和鸭的 MCP 的 ePR 显著高于 DCP（P＜0.05）。本研究数据表明，采用替代法评估饲料磷的生物学效价具有自身优势；MCP 对肉鸡和鸭的生物学效价均高于 DCP。
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