采用英系北京鸭评定棉籽粕净能的研究

发布时间：2018-02-28 20:34

本文关键词： 棉籽粕净能肉鸭常规成分预测　出处：《动物营养学报》2017年01期 　论文类型：期刊论文

【摘要】：本研究旨在评定棉籽粕在英系北京鸭上的净能(NE),并运用棉籽粕的表观代谢能(AME)和常规成分建立其预测方程。根据析因法将棉籽粕替代饲粮的NE剖分为维持净能(NEm)和生产净能(NEp),利用回归法测定NEm,比较屠宰法测定NEp,再套算得到棉籽粕的NE。选取400只7日龄的英系北京鸭进行动物试验。首先选取20只肉鸭在试验开始时挫颈致死,测定其体能量作为测定NEm和NEp的共同初始能量对照;再选取50只肉鸭用于NEm的测定,NEm用禁食产热(FHP)估计,共设5个组(每组5个重复,每个重复2只),分别为自由采食组及限饲15%、25%、35%、45%组,均饲喂基础饲粮1;剩余的330只肉鸭用于NEp的测定,共设33个组(每组5个重复,每个重复2只),分别饲喂基础饲粮2和以不同棉籽粕替代15%基础饲粮2的试验饲粮。于14日龄时将所有的试鸭挫颈致死,测定所有试鸭的体能量。最后,将实测棉籽粕NE与AME和其常规成分进行相关分析和多元逐步线性回归分析建立棉籽粕NE的预测方程。结果显示:英系北京鸭的FHP为580.7 k J/(kg BW0.75·d),棉籽粕替代饲粮提供给肉鸭的NEm和NEp分别为(2.97±0.15)MJ/kg和(5.22±0.12)MJ/kg,棉籽粕替代饲粮提供给肉鸭的NE为(8.19±0.09)MJ/kg,计算得到的棉籽粕的NE和AME分别为(6.12±0.62)MJ/kg和(10.05±1.02)MJ/kg,AME转化为NE的效率为(60.97±2.04)%,使用AME和常规成分建立棉籽粕NE的最佳预测方程为NE=3.276+0.241AME+0.044CP-0.081ADF[决定系数(R2)=0.954,残余标准差(RSD)=0.13 M J/kg,P0.01],式中CP为粗蛋白质,ADF为酸性洗涤纤维。由以上结果可知:英系北京鸭棉籽粕的NE为(6.12±0.62)MJ/kg,分布范围为5.04~7.30 M J/kg,变异较大;运用AM E结合常规成分可以准确预测英系北京鸭棉籽粕的NE。
[Abstract]:The purpose of this study was to evaluate the net energy of cottonseed meal on British Peking duck, and to establish its prediction equation by using the apparent metabolic energy (AMEE) of cottonseed meal and its conventional components. According to the factorization method, the NE-section of cottonseed meal instead of diet was subdivided to maintain net energy NEm. Nemin was determined by regression method, NEP was determined by comparative slaughter method, and NEP of cottonseed meal was calculated. 400 British Peking ducks aged 7 days were selected for animal experiment. First, 20 meat ducks were killed at the beginning of the experiment. The body energy was measured as the common initial energy control for the determination of NEm and NEp, and 50 meat ducks were selected for NEm determination. Each of the three groups was fed with basic diet 1, and the remaining 330 ducks were used for the determination of NEp, with 33 groups (5 replicates in each group), respectively, in the free feeding group and in the control group, which were fed with 35% and 45% of the total number of rats, and the rest 330 ducks were used for the determination of NEp, and there were 3 groups (5 replicates in each group). The experimental diets fed with basal diet 2 and different cottonseed meal instead of 15% basal diet 2 were fed to each duplicate of 2. All the tested ducks were killed at 14 days of age, and the physical capacity of all the tested ducks was measured. The correlation analysis and stepwise linear regression analysis between NE and AME and their conventional components in cottonseed meal were carried out, and the prediction equation of NE in cottonseed meal was established. The results showed that the FHP of British Peking duck was 580.7 k / kg BW0.75 路dl, and cottonseed meal was used as a substitute for diet. The NEm and NEp of meat duck were 2.97 卤0.15 MJ / kg and 5.22 卤0.12 MJ / kg, respectively. The NE of cottonseed meal substitute diet for meat duck was 8.19 卤0.09 MJ / kg. The NE and AME of cottonseed meal were 6.12 卤0.62MJ / kg and 10.05 卤1.02MJ / kg respectively. The efficiency of converting NE into NE was 60.97 卤2.04N / kg, respectively. The best prediction equation was NE=3.276 0.241 AME 0.044 CP-0.081 ADF [determination coefficient R2N 0.954, residual standard deviation 0.13 MJ / kg, P0.01], in which CP was crude protein and ADF was acidic washing fiber. From the above results, the NE of British Beijing duck cottonseed meal was 6.12 卤0.62MJ / kg, the distribution range was 5.040.30 MJ / kg, and the variation was great. The application of AM E combined with conventional components can accurately predict the NES of cotton seed meal of British Peking duck.
【作者单位】：四川农业大学动物营养研究所;西藏职业技术学院;
【基金】：四川省科技支撑计划(2013NZ0054) 四川农业大学双支计划
【分类号】：S816

【相似文献】