A simple daily dynamic feeding regimen for reducing phosphorus consumption and excretion in laying hens

作     者：Xujie Liao Jiakun Yan Jionghao Chen Zhenyu Huang Tianshuai Xiao Changqing Li Chong Pan Xin Yang Yanli Liu Thomas D.Crenshaw Xiaojun Yang Zhouzheng Ren Xujie Liao;Jiakun Yan;Jionghao Chen;Zhenyu Huang;Tianshuai Xiao;Changqing Li;Chong Pan;Xin Yang;Yanli Liu;Thomas D.Crenshaw;Xiaojun Yang;Zhouzheng Ren

作者机构：College of Animal Science and TechnologyNorthwest A&F UniversityYanglingShaanxi 712100China Department of Animal SciencesUniversity of Wisconsin-MadisonMadisonWI 53706USA 

出 版 物：《Animal Nutrition》 (动物营养（英文版）)

年 卷 期：2022年第11卷第4期

页      面：132-141页

核心收录：

学科分类：090502[农学-动物营养与饲料科学] 0905[农学-畜牧学] 0906[农学-兽医学] 09[农学] 

基　　金：financially supported by National Natural Science Foundation of China(32172759) Shaanxi Provincial Science and Technology Department(2022QFY11-05) 

主　　题：Phosphorus-calcium homeostasis Dynamic feeding regimen Egg production Laying hen Phosphorus excretion 

摘      要：Phosphorus metabolism in laying hens is a highly dynamic process over the course of the 24 h egg-laying *** the phosphorus feeding regimen according to the daily egg-laying cycle may help to improve phosphorus utilization ***-Line Brown layers(n=120;70 wk old)were offered 4different phosphorus daily regimens:(1)RR,fed regular phosphorus at both 09:00 and 17:00;(2)RL,fed regular phosphorus at 09:00 and low phosphorus at 17:00;(3)LR,fed low phosphorus at 09:00 and regular phosphorus at 17:00;(4)LL,fed low phosphorus at both 09:00 and 17:*** regular and low phosphorus diets contained 0.32% and 0.14% non-phytate phosphorus,*** feeding trial lasted for 12 *** a result,layers on the RL regimen had decreased laying rate(P0.05);(2)decreased phosphorus excretion(P0.05)during the period of09:00 to 17:00;(3)increased jejunal calbindin D28k protein expression(P0.05)2 h after feeding in the morning;(4)decreased serum fibroblast growth factor 23 and calcitriol levels(P0.05),decreased jejunal type Ⅲ sodium-phosphate cotransporter 2 gene and protein expression(P0.05),and decreased renal type Ⅲ sodium-phosphate cotransporter 1 protein expression(P0.05),2 h after feeding in the *** summary,when dietary phosphorus was supplemented in accordance with daily serum phosphorus rhythms(i.e.,the LR regimen),laying performance and egg quality were well supported whilst significantly decreasing phosphorus consumption and ***,serum phosphorus rhythms will need to be carefully maintained when developing dietar