肉用绵羊饲料养分消化率和有效能预测模型的研究  

Prediction of Nutrient Digestibility and Energy Concentrations Using Chemical Compositions in Meat Sheep Feeds

作　　者：刘洁[1] 刁其玉[1] 赵一广[1] 姜成钢[1] 邓凯东[1] 李艳玲[1] 屠焰[1] 

机构地区：[1]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,北京100081

出　　处：《畜牧兽医学报》2012年第8期1230-1238,共9页ACTA VETERINARIA ET ZOOTECHNICA SINICA

基　　金：农业部公益性行业(农业)项目(200903006)

摘　　要：旨在建立肉用绵羊饲料营养成分消化率和有效能预测模型。选用(47.21±1.01)kg,安装瘤胃瘘管的杜泊羊(♂)×小尾寒羊(♀)杂交1代肉用公羊12只,采用12×4不完全拉丁方设计,分别测定12种日粮的概略养分含量,通过动物试验实测养分消化率和有效能值,并进行消化率和有效能与化学成分的一元或多元线性回归分析,建立预测模型。结果表明,干物质(DM)、有机物(OM)、总能(GE)和粗蛋白质(CP)的消化率与它们在饲料中的含量均呈极显著正相关(P<0.01),而与中性洗涤纤维(NDF)呈极显著负相关(P<0.01)。NDF消化率与饲料中的OM、GE和CP均呈显著负相关(P<0.05),与NDF呈极显著正相关(P<0.01)。消化能(DE)和代谢能(ME)与饲料中的OM、GE和CP的含量均呈极显著正相关(P<0.01),而与NDF呈极显著负相关(P<0.01)。用饲料中概略养分含量预测能量消化率(ED)和代谢能的预测模型分别为:ED(%)=194.907-0.987NDF(%)-0.901OM-0.603CP(%)(R2=0.966,n=12,P<0.001)和ME(MJ.kg-1 DM)=50.245-0.136NDF(%)-0.394OM(%)-0.012CP(%)(R2=0.901,n=12,P<0.001)。饲料中的营养成分消化率与概略养分含量存在明显的相关性,各种有效能值与营养成分之间的相关性显著,通过概略养分可对饲料的养分消化率和有效能进行比较准确的预测。The objectives of this experiment were to use the data of chemical composition to develop prediction equations for nutrient digestibility and energy concentrations of meat sheep feeds.Twelve crossbred rams（Dorper♂×Small-tailed Han♀） fitted with ruminal cannulas and body weight of（47.21±1.01） kg were used in a uncompleted 12×4 Latin square arrangement.Chemical composition,nutrient digestibility and energy concentrations of each ration were determined and calculated by regression method.The results showed that,digestibility of dry matter（DM）,organic matter（OM）,gross energy（GE） and crude protein（CP） were positively related to their contents in diet（P〈0.01）,whereas they were negatively related to neutral detergent fiber（NDF）（P〈0.01）.Digestibility of NDF was negatively related to OM,GE and CP in diet（P〈0.05）,and positively related to the NDF（P〈0.01）.There were positive relationship between concentrations of digestible energy（DE） and metabolizable energy（ME） and the content of OM,GE and CP in diet（P〈0.01）,whereas they were negatively related（P〈0.01） to NDF.Prediction equation of energy digestibility（ED） and ME based on chemical composition were ED（%）=194.907-0.987NDF（%）-0.901OM（%）-0.603CP（%）（R2=0.966,n=12,P〈0.001） and ME（MJ·kg-1DM）=50.245-0.136NDF（%）-0.394OM（%）-0.012CP（%）（R2=0.901,n=12,P〈0.001）,respectively.These results indicated that there were significant relationship between nutrient digestibility,energy concentrations and chemical composition,and the equations developed in the present experiment could accurately predict nutrient digestibility and energy concentrations using chemical composition in meat sheep feeds.

关 键 词：绵羊 消化率 有效能 预测方程 

分 类 号：S826[农业科学—畜牧学] S815.4[农业科学—畜牧兽医]