文献类型：期刊文献

英文题名：Dietary calcium requirements of broilers fed a conventional corn-soybean meal diet from 1 to 21 d of age

作者：Bai, Shingping[3]; Yang, Yunfeng[1]; Ma, Xuelian[1]; Liao, Xiudong[1]; Wang, Runlian[4]; Zhang, Liyang[1]; Li, Sufen[5]; Luo, Xugang[2]; Lu, Lin[1]

机构：[1] Mineral Nutrition Research Division, State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China; [2] Poultry Mineral Nutrition Laboratory, College of Animal Science and Technology, Yangzhou University, Yangzhou, 225000, China; [3] Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; [4] Department of Animal Science, Guangdong Ocean University, Zhanjiang, 524088, China; [5] Department of Animal Science, Hebei Normal University of Science and Technology, Qinhuangdao, 066004, China

年份：2021

外文期刊名：Research Square

收录：EI(收录号：20220163006)

语种：英文

外文关键词：Birds - Bone - Calcium - Metabolism - Phosphatases

外文摘要：Background The current calcium (Ca) recommendation for broilers is primarily based on studies conducted more than 30 years ago with birds of markedly different productive potentials from those which exist today. And the response indicators in these studies are mainly growth performance and bone ash percentage. Therefore, the present study was carried out to investigate the effect of dietary Ca level on growth performance, serum parameters, bone characteristics and Ca metabolism-related gene expressions, so as to estimate dietary Ca requirements of broilers fed a conventional corn-soybean meal diet from 1 to 21 d of age. Methods A total of 420 1-day-old Arbor Acres male broilers were randomly assigned to 1 of 7 treatments with 6 replicates (10 birds per cage) and fed the corn-soybean meal diets containing 0.60, 0.70, 0.80, 0.90, 1.00, 1.10 or 1.20% Ca for 21days. Each diet contained the constant non-phytate phosphorus content of about 0.39%. Results The average daily gain decreased linearly (P ? 2021, CC BY.