几种绵羊常用粗饲料GI的测定及其代谢能模型化研究  

Analyse GI of Several Kinds of Common Sheep Forage and Study on Their ME Modeling

作　　者：张吉鹍[1] 卢德勋[2] 胡明[2] 任晓萍[2] 娜仁[2] 

机构地区：[1]浙江大学动物科学学院,浙江杭州310029 [2]内蒙古畜牧科学院动物营养研究所,内蒙古呼和浩特010030

出　　处：《四川草原》2005年第7期1-5,26,共6页Journal of Sichuan Grassland

摘　　要：在测定五类九种粗饲料及三个混合粗饲料的常规成分基础上,实测了它们的粗饲料分级指数(GradingIndex,GI):大青山草地早熟禾3.4758、沙打旺3.3731、苜蓿1.7202、混粗C21.1797、青干草1.1029、混粗C10.7852、羊草0.5684、玉米青贮0.4152、玉米秸秆0.1985、谷草0.1728、混粗D0.0805、苏丹草0.0687,并就GI与饲料相对值(RelativeFeedValue,RFV)对粗饲料品质的分级进行了比较,表明GI要优于RFV,同时证明:GI还可以用于混合粗饲料的优化与牧草刈割期的确定。本研究建立了预测粗饲料ME的模型:ME(MJ/kg)=-11.7492+0.5959IVDMD(%)-0.0044[IVEMD(%)]2。After routine analysis of 9kinds common sheep forage (Poa pratensis,Erect milkvetch,Alfalfa,Chinesewildryi,Hay,Sudan grass,Corn stover,Milletstrawand Corn silage) and 3 mixed foragegroupsC1、C2and D,their GI wereobserved:3.4758,3.3731,1.7202,0.5684,1.1029,0.0687,0.1985,0.1728,0.4152,0.7852,1.1797and 0.0805 respectively,andMEpredictingmodelwasbuilt:ME(MJ/kg) =- 11.7492+0.5959IVDMD(%) -0.0044[IVDMD(%)]2.Comparison studyingof the forage evaluation indices GI and RFV had showed not only GI was better than RFV in forage grading but also GIcould be used to optimize the formula of mixed various kinds of forage and to determine the optimum forage cutting time.

关 键 词：绵羊 粗饲料 分级 GI ME 模型 

分 类 号：S816.5[农业科学—饲料科学]