文献类型：期刊文献

中文题名：代谢能和粗蛋白水平对22～42日龄科宝肉鸡生产性能、养分表观代谢率及肠道消化酶活性的影响

英文题名：Effects of energy and crude protein levels on production performance,nutrient apparent metabolic rate and the intestinal digestive enzymes in 22-42 day-old cobb broilers

作者：曹赞[1];高振华[1];陈广信[1];黎秋平[1];陈彩文[1];黄志鹏[1];范葶莉[1]

机构：[1]广东海洋大学农学院,广东湛江524088

年份：2016

卷号：36

期号：5

起止页码：839

中文期刊名：中国兽医学报

外文期刊名：Chinese Journal of Veterinary Science

收录：CSTPCD、、北大核心2014、北大核心、CSCD_E2015_2016、CSCD

基金：广东省教育厅人才引进基金资助项目(粤财教[2009]109号);广东海洋大学教育教学改革基金资助项目(XJG201153)

语种：中文

中文关键词：代谢能;粗蛋白;肉鸡;生产性能;养分表现代谢率;肠道消化酶;二次回归正交旋转组合设计

外文关键词：energy; crude protein; broiler; production performance; nutrient apparent metabolic rate; intestinal digestive enzymes; quadratic regression orthogonal rotation combination design;

中文摘要：本试验通过二因子二次回归正交旋转组合设计,以代谢能和粗蛋白作为2个试验因子,旨在研究22-42日龄肉仔鸡代谢能和粗蛋白水平的最佳组合效应。试验选取健康、体质量接近的22日龄科宝肉鸡480只,随机分为12个组,每组4个重复,每个重复10只鸡,公母各半,其中1-8组为试验组,9-12组为中心组（即零水平组）,试验期为21d。分别以代谢能和粗蛋白水平为自变量,以生产性能各项指标作为因变量拟合回归方程。结果表明,饲粮代谢能和粗蛋白水平可显著改善22-42日龄肉仔鸡的平均日增重、料重比（P〈0.05）。从非线性回归分析及响应面图显示,当粗蛋白水平在20.00%左右时,代谢能水平10.80-12.80 MJ/kg之间时,平均日增重处于较高水平,但当代谢能水平在14.21-14.80MJ/kg之间时,平均日增重有下降趋势;当代谢能和粗蛋白水平为12.70MJ/kg,19.78%时,可达到最大平均日采食量;当代谢能和粗蛋白水平为12.65 MJ/kg,20.16%时,料重比最小为1.95。综上所述,当22-42日龄科宝肉鸡饲粮代谢能和粗蛋白水平分别为12.65-12.96 MJ/kg和19.78%-20.25%时,可以获得较好的生产性能,饲粮养分表观代谢率及肠道消化酶活性均较高,饲料转化率也较高。

外文摘要：In order to study the best combination effects of energy and crude protein in 22-42 dayold broilers,two factors quadratic regression orthogonal rotation combination design was used.A total of 480one-day-old Cobb broilers were randomly divided into 12 groups with（4replicates of replicate had 10 each,male and female in half.Groups 1-8were experiment groups,and groups 9-12 were center groups（zero level）.The experiment lasted for 21 d.The results showed that increasing level of energy and crude protein could improve average daily gain（ADG）,feed/gain（F/G）of Cobb broilers aged 22 to 42days（P〈0.05）.The nonlinear regression analysis and response graphs showed that ADG was in a higher level when the crude protein level was as 20%and energy level was between 10.80 and 12.80MJ/kg,but the ADG was decreased with the increased energy level from 14.21 MJ/kg to 14.80 MJ/kg;the ADFI was biggest when the energy and crude protein level were 12.70MJ/kg and 19.78%respectively,and the lowest F/G was 1.95 when the energy and crude protein level were 12.65MJ/kg and 20.16%respectively.Overall,when dietary energy and crude protein levels were 12.65-12.96 MJ/kg and 19.78%-20.25% of Cobb broilers aged22 to 42days,the broiler performance was the best and nutrient apparent metabolic rate,intestinal digestive enzymes and Feed conversion rate were all higher.