挤压膨化微贮玉米秸秆的瘤胃降解特性  

Ruminal Degradation Characteristics of Extrusion and Ensilage Pretreated Corn Stover

作　　者：王玉婷 于维[2] 祁宏伟[2] WANG Yu-ting;YU Wei;QI Hong-wei(College of Animal Science and Technology,Jilin Agricultural University,Jilin Changchun 130118,China;Animal Science Branch,Jilin Academy of Agricultural Sciences,Jilin Gongzhuling 136100,China)

机构地区：[1]吉林农业大学动物科学技术学院,吉林长春130118 [2]吉林省农业科学院畜牧科学分院,吉林公主岭136100

出　　处：《中国畜牧杂志》2018年第11期75-78,83,共5页Chinese Journal of Animal Science

基　　金：吉林省重点科技攻关项目(20160204015NY);吉林省农业科技创新工程项目(CXGC2017Y003);吉林省农业科技创新工程研究生基金

摘　　要：本试验旨在研究膨化微贮、黄贮、常规玉米秸秆的瘤胃降解特性,为膨化微贮玉米秸秆的应用提供一定的理论依据。试验选用3头装有永久性瘤胃瘘管的草原红牛,采用尼龙袋法测定膨化微贮、黄贮、常规玉米秸秆的粗蛋白质(CP)、中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)的瘤胃降解率。结果表明:膨化微贮玉米秸秆的CP有效降解率极显著大于黄贮玉米秸秆(P<0.01),黄贮玉米秸秆的CP有效降解率极显著大于常规玉米秸秆(P<0.01);NDF有效降解率为膨化微贮玉米秸秆>黄贮玉米秸秆>常规玉米秸秆,膨化微贮玉米秸秆与常规玉米秸秆差异显著(P<0.05),但黄贮与其他两者差异不显著(P>0.05);膨化微贮与黄贮玉米秸秆的ADF有效降解率极显著大于常规玉米秸秆(P<0.01),但前二者之间差异不显著(P>0.05)。试验结果表明,膨化微贮玉米秸秆的CP、NDF、ADF有效降解率显著高于黄贮和常规玉米秸秆。Corn stover was extruded,and then ensiled by adding microbial inoculant.Afterwards,in situ rumen incubation was conducted to determine the ruminal degradation characteristics of the extrusion and ensilage pretreated corn stover(EECS)in comparison with ensiled corn stover(ECS)and corn stover(CS).Three local grassland red bulls fitted with permanent rumen fistulas were applied to determine ruminal degradation characteristics of crude protein(CP),neutral detergent fiber(NDF)and acid detergent fiber(ADF)using Nylon Bag technique.As a result,,the effective degradability of CP ranked:EECS>ECS>CS(P<0.01);The effective degradability of NDF numerically ranked:EECS>ECS>CS,but the significant difference was observed only between EECS and CS(P<0.05),but there was no significant difference between ECS and CS(P>0.05);The lowest effective degradability of ADF occurred in corn stover(P<0.01),but no significant difference was found between EECS and ECS silage(P>0.05).In conclusion,the effective degradation results showed EECS in comparison with ECS and CS presented a higher nutrient degradability in the rumen.

关 键 词：瘤胃降解率 尼龙袋法 膨化微贮玉米秸秆 

分 类 号：S816[农业科学—饲料科学]