不同产地全株玉米青贮的瘤胃降解特性与小肠消化率的研究  

Rumen Degradation Characteristics and Intestinal Digestibility of Whole Corn Silages from Different Areas

作　　者：李洋[1] 李春雷[2] 赵洪波[3] 张永根[1] 

机构地区：[1]东北农业大学动物科学技术学院,哈尔滨150030 [2]东北师范大学数学与统计学院,长春130024 [3]东北农业大学新农村发展研究院,哈尔滨150030

出　　处：《动物营养学报》2015年第5期1641-1649,共9页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：国家奶牛产业技术体系(CARS-37)

摘　　要：本试验旨在研究不同产地全株玉米青贮的营养价值、瘤胃降解特性以及小肠消化率的差异。选取产自于甘肃(A)、山东(B)、四川(C)、陕西(D)和沈阳(E)5个地区的全株玉米青贮样品,进行常规营养成分和氨基酸组成分析。选用3头体重为550 kg左右、安装有永久性瘤胃瘘管的荷斯坦奶牛,采用尼龙袋法测定5个产地的全株玉米青贮的干物质(DM)、粗蛋白质(CP)、中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)的瘤胃降解参数以及DM、CP和氨基酸(AA)的小肠消化率。结果表明:不同产地的全株玉米青贮常规营养成分存在差异。5个产地的全株玉米青贮的DM、CP、NDF、ADF瘤胃有效降解率之间存在差异,其高低顺序分别为B>E>A>D>C、C>A>D>B>E、B>A>D>C>E、D>A>C>B>E。5个产地的全株玉米青贮的DM、CP和各AA小肠消化率之间存在差异,其中DM、CP和总氨基酸(TAA)小肠消化率的高低顺序分别为C>A>D>B>E、C>A>B>D>E、A>D>B>C>E。由此得出,不同产地的全株玉米青贮的营养成分含量、瘤胃降解参数以及小肠消化率存在较大差异,在全株玉米青贮的使用中应快速准确地测量其中各种营养成分的含量,以便更有效地利用饲料资源,避免浪费。The objective of this study was to research the differences in nutritional value, rumen degradation characteristics and intestinal digestibility of whole corn silages from different areas. Five whole corn silage sam- ples were collected from Gansu （A） , Shandong （B） , Sichuan （C） , Shaanxi （D） and Shenyang （E） , and the common nutritional components and amino acid composition of feed samples were analysed. Three perma- nent ruminal cannulated Holstein cows with around 550 kg of body weight were used to evaluate rnmen degra- dation characteristics of dry matter （DM）, crude protein （CP）, neutral detergent fiber（NDF） and acid deter- gent fiber （ADF）, and intestinal digestibility of DM, CP and amino acids （AA） by nylon bag technique. The results showed that differences were found in common nutritional components, and rumen effective degradabili- ty of DM, CP, NDF and ADF among whole corn silages from different areas. Ranking of the rumen effective degradability of DM, CP, NDF and ADF of whole corn silages from 5 areas from high to low was B〉E〉A〉 D〉C, C〉A〉D〉B〉E, B〉A〉D〉C〉E and D〉A〉C〉B〉E, respectively. The intestinal digestibility of DM, CP and each amino acid was different. Ranking of intestinal digestibility of DM, CP and total amino acids （TAA） of whole corn silages from 5 areas from high to low was C〉A〉D〉B〉E, C〉A〉B〉D〉E and A〉D〉B〉C〉E, respectively. In conclusion, there were large differences in nutritional component contents, rnmen degradation parameters and intestinal digestibility of whole corn silages from different areas. In order to use feed resources more effectively and avoid waste, so rapidly accurate methods should be used to measure the contents of nutri- tion components in whole corn silage.

关 键 词：全株玉米青贮 奶牛 瘤胃降解特性 小肠消化率 

分 类 号：S816[农业科学—饲料科学]