肉用绵羊饲粮营养物质消化率和代谢能预测模型的研究

发布时间：2018-06-02 02:47

本文选题：肉用绵羊 + 消化率　；参考：《动物营养学报》2017年02期

【摘要】：本试验旨在建立肉用绵羊饲粮营养物质消化率和代谢能(ME)的预测模型。选用66只体重为(45.0±2.0)kg的体况良好的杜泊×小尾寒羊F1代杂交肉用羯羊,随机分为11个处理,每个处理6个重复,每个重复1只羊。采用随机区组设计,分别测定11种不同粗饲料组成的饲粮的营养物质含量,通过物质代谢试验和气体代谢试验测定这11种饲粮的营养物质消化率、消化能(DE)及ME,在分析饲粮营养物质含量、可消化营养物质、DE和ME的基础上,筛选出最佳估测因子并建立估测方程。结果表明:饲粮干物质(DM)、有机物(OM)、粗蛋白质(CP)、总能(GE)消化率与饲粮中CP、GE和OM含量呈显著或极显著正相关(P0.05或P0.01),与中性洗涤纤维(NDF)含量呈显著负相关(P0.05);饲粮NDF消化率与饲粮中DM、OM、CP、GE含量达到显著或极显著负相关(P0.05或P0.01),与NDF含量达到极显著正相关(P0.01)。利用饲粮中营养物质含量对ME进行估测的最佳方程为ME=-49.593+0.594OM-0.107NDF(R2=0.949,P0.01)。由此得出,饲粮营养物质消化率、ME与营养物质含量均有较强的相关性,可通过营养物质含量对饲粮的营养物质消化率、ME进行合理估测。
[Abstract]:The purpose of this experiment was to establish a prediction model for the nutrient digestibility and metabolic energy (ME) of the meat sheep feeding diet (ME), which was randomly divided into 11 treatments, each of which were 6 repetitions and 1 sheep, each with a good body weight of (45 + 2) kg (45 + 2), and 11 kinds of sheep were determined by random area group. The nutrient content of the diet made up of the same coarse feed was measured by material metabolism test and gas metabolism test. The nutrient digestibility of the 11 diets, digestive energy (DE) and ME were measured. On the basis of the analysis of nutrient content in the diet, digestible nutrients, DE and ME, the best estimation factor was screened and the estimation equation was established. The digestibility of grain dry matter (DM), organic matter (OM), crude protein (CP) and total energy (GE) had significant or extremely significant positive correlation with the content of CP, GE and OM in the diet (P0.05 or P0.01), and had a significant negative correlation with the content of neutral detergent fiber (NDF). The DF content reached a very significant positive correlation (P0.01). The optimal equation for estimating ME by the nutrient content in the diet was ME=-49.593+0.594OM-0.107NDF (R2=0.949, P0.01). Thus, it was concluded that the nutrient digestibility of the diet and the content of the nutrient substance were strongly correlated, and the nutrient content could be used to digest the nutrients of the diet. Rate, ME can be reasonably estimated.
【作者单位】：中国农业科学院饲料研究所农业部饲料生物技术重点实验室;金陵科技学院动物科学与技术学院;新疆农业大学动物科学学院;
【基金】：秸秆饲料生物转化技术研究与示范(20120304202) 国家肉羊产业技术体系(CARS-39) 绵羊甲烷排放的粪便反射特征光谱研究(41475126)
【分类号】：S826.5

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