摘要
本试验旨在通过研究饲粮代谢能(metabolizable energy,ME)和粗蛋白质(crude protein,CP)水平对肉仔鸡生长性能和屠宰指标的影响,建立生长性能与ME、CP的回归关系模型,并运用所建模型选择具有最佳效益的ME、CP水平。采用ME和CP 3×3随机交叉试验设计,将饲粮分为9个处理,3个ME水平分别为13.18、12.55、11.92 MJ/kg,3个CP水平分别为21.50%、20.50%、19.50%。选取1日龄爱拔益加(AA)肉仔鸡1 080只,随机分为9组,每组3个重复,每个重复40只鸡,1～21日龄分别饲喂对应试验饲粮,22～42日龄饲喂相同的饲粮。结果表明:1)试验饲粮ME、CP水平对1～21日龄体重和耗料量有显著影响(P<0.05),对42日龄体重也有显著影响(P<0.05)。2)随着饲粮ME水平的提高,21和42日龄肌胃指数显著降低(P<0.05),42日龄腹脂率显著增加(P<0.05)。3)应用二元曲线逐步回归方法建立了体重、耗料量与饲粮ME、CP水平的回归关系模型。应用举例表明,建立的回归关系模型对确定肉仔鸡饲粮最佳效益的ME、CP水平有很强的实用性。
This experiment was conducted to establish the relational models of growth performance and dietary nutrition levels by studying the effects of dietary metabolizable energy(ME) and crude protein(CP) on growth performance and slaughter indices of broilers.The optimal ME and CP levels could be obtained from the established models according to market quotation.A 3×3(ME×CP) completely random experiment was designed to allocate 1 080 one-day-old broilers into 9 treatments with 3 replicates per treatment and 40 birds per replicate.The three dietary ME levels were 13.18、12.55、11.92 MJ/kg and the three CP levels were 21.50%、20.50%、19.50% in diets for broilers aged 1 to 21 days,respectively.Broilers aged 22 to 42 days were fed the same diets.The results showed as follows: 1) dietary ME and CP levels had significant effects on body weight(BW) and feed consumption(FC) of broilers aged 1 to 21 days(P<0.05),and it also had significant effects on BW of broilers at 42 days of age(P<0.05);2) gizzard index of broilers at 21 and 42 days of age was decreased and percentage of abdominal fat of broilers at 42 days of age was increased with increasing dietary ME levels(P<0.05);3) the regression relational models of growth performance and dietary ME and CP levels were established using binary curvilinear stepwise regression method.In conclusion,the illustration in practice indicates that the established models are very useful to ascertain the optimal dietary ME and CP levels.
出处
《动物营养学报》
CAS
CSCD
北大核心
2012年第7期1283-1292,共10页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
山东省科技发展计划项目(2007GG10009004)
关键词
肉仔鸡
代谢能
粗蛋白质
生长性能
屠宰指标
回归关系模型
broilers
metabolizable energy
crude protein
growth performance
slaughter index
regression relational model
