体外产气法和尼龙袋法评价5种全株玉米青贮的饲用价值  

Evaluation on Feeding Values of 5 Kinds of Whole Plant Corn Silage by in Vitro Gas Production and Nylon Bag Methods

作　　者：张元庆[1] 靳光[1] 王栋才[1] 李博[1] 徐芳 程景[1] 张丹丹[1] ZHANG Yuanqing;JIN Guang;WANG Dongcai;LI Bo;XU Fang;CHENG Jing;ZHANG Dandan(Institute of Animal Husbandry and Veterinary Medicine,Shanxi Academy of Agricultural Science,Taiyuan 030032,China)

机构地区：[1]山西省农业科学院畜牧兽医研究所

出　　处：《动物营养学报》2019年第12期5682-5687,共6页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：公益性行业(农业)科研专项(201503134);农牧交错带牛羊牧繁农育关键技术集成示范项目(16190050);国家重点研发计划(2018YFD0501703);牛高产低排营养调控山西省科技创新培育团队建设(201605D131043);山西省现代农业产业技术体系(2017-05)

摘　　要：本试验旨在通过体外产气法和尼龙袋法对5种全株玉米青贮的饲用价值进行评价。选取5种全株玉米青贮(分别由大丰26号、晋单65号、登海679号、潞研10号、屯玉168号青贮玉米制作),测定其常规营养成分含量;体外产气法测定不同发酵时间的产气量,计算产气参数;尼龙袋法测定不同时间的干物质(DM)降解率,计算降解参数。结果显示:晋单65号的酸性洗涤纤维(ADF)含量最低,5种全株玉米青贮的粗蛋白质(CP)含量保持在5.46%~7.27%。晋单65号、登海679号、屯玉168号的粗脂肪(EE)含量显著高于大丰26号、潞研10号(P<0.05)。晋单65号的72 h产气量最高,为86.70 mL,且其产气速度显著高于登海679号和屯玉168号(P<0.05),发酵72 h的DM降解率显著高于其他4个品种(P<0.05)。综上,由晋单65号青贮玉米制作的全株玉米青贮营养成分含量较高,且更容易发酵,易于消化。In this experiment,the feeding values of 5 kinds of whole plant corn silage were evaluated by in vitro gas production and nylon bag methods. Five kinds of whole plant corn silage made from Dafeng 26,Jindan 65,Denghai 679,Luyan 10 and Tunyu 168 silage corn,respectively,were collected to measure the common nutrient component contents. The gas production at different fermentation time was measured by in vitro gas production method,and the gas production parameters were calculated. The dry matter degradation rate was measured by nylon bag method,and the degradation parameters were calculated. The results showed as follows: the acid detergent fiber content of Jindan 65 was the lowest,and the range of crude protein content of 5 kinds of whole plant corn silage was 5.46% to 7.27%. The ether extract content of Jindan 65,Denghai 679,Tunyu 168 was significantly higher than that of Dafeng 26 and Luyan 10(P<0.05). Jindan 65 had the highest72 h gas production of 86.70 mL,and the gas production rate of Jindan 65 was significantly higher than that of Denghai 679 and Tunyu 168(P<0.05). The dry matter degradation rate after 72 h fermentation of Jindan 65 was significantly higher than that of other 4 varieties(P<0.05). In conclusion,whole plant corn silage made of Jindan 65 silage corn has higher nutrient component contents and is easier to be fermented and digested.

关 键 词：体外产气法 尼龙袋法 全株玉米青贮 饲用价值 

分 类 号：S816[农业科学—饲料科学]