青贮对饲料稻秸秆DM和NDF瘤胃降解特性的影响  

Effect of ensiling on Content and Rumen Degradability of Forage Rice Straw's DM and NDF

作　　者：张佩华[1] 王加启[1] 贺建华[2] 卜登攀[1] 刘朝干[2] 

机构地区：[1]中国农业科学院北京畜牧兽医研究所动物营养国家重点实验室,北京100094 [2]湖南农业大学动物科技学院,湖南长沙410128

出　　处：《草业科学》2008年第6期80-84,共5页Pratacultural Science

基　　金：国家科技支撑计划"反刍;水产等动物配合饲料生产技术集成与产业化示范"(2006BAD12B08-08);"奶牛高效饲养关键技术研究及开发"(2006BAD12B03)

摘　　要：选用3头带永久性瘤胃瘘管的中国荷斯坦泌乳奶牛,以直接晒干饲料稻Oryza sativa秸秆(HRS)为对照,鲜湿稻秆青贮(SRS)为试验组,研究了青贮对饲料稻湘早籼24号秸秆干物质(DM)和中性洗涤纤维(NDF)瘤胃降解特性的影响。结果表明:青贮显著降低了NDF的含量(P<0.05),对粗蛋白(CP)、粗脂肪(EE)、无氮浸出物(NFE)和酸性洗涤纤维(ADF)无显著影响(P>0.05);青贮极显著提高了饲料稻6、12、24 h时间点的DM和NDF的瘤胃消失率(P<0.01),显著提高了48和72 h时间点的DM和NDF的瘤胃消失率(P<0.05),对36 h时间点DM和NDF瘤胃消失率无显著影响(P>0.05);青贮极显著提高了DM和NDF慢速降解部分(b)和其降解速度常数(c)(P<0.01),对快速降解部分(a)无显著影响(P>0.05);极显著提高了DM和NDF瘤胃有效降解率(P<0.01)。结论:青贮可改善饲料稻秸秆养分DM和NDF的瘤胃降解特性,是合理利用水稻秸秆,挖掘其饲用价值的有效途径。Three milking dairy cow fitted with rumen cannulas were selected to study the effect of ensiling on rumen degradable characteristics of dry matter（DM） and detergent fiber（NDF）of Xiangzaoxian No. 24 feed rice, compared with dry rice straw. The results demonstrated that ensiling significantly decreased NDF content （P（0.05） but had no remarkable influence on CP, EE and ADF. The rumen loss rates of DM and NDF at 6, 12, 24, 48 and 72 h of digestion increased significantly （P〈0.01）.For rumen fermentation characteristics, ensiling increased parameter b and c（P〈0.01）. There was no insignificant difference observed on parameter a （P〉0.05）. Compared with the control, ensiling increased effective DM and NDF degradability （P〈0.01）. it was concluded that ensiling treatment can improve rumen degradability of DM and NDF and was an effective way to explore its feed value.

关 键 词：饲料稻 秸秆 青贮 降解特性 干物质 中性洗涤纤维 

分 类 号：S816[农业科学—饲料科学]