全株玉米青贮中性洗涤纤维降解率的影响因素:以宁夏地区正大12为例  

Analysis of factors influencing the degradation rate of neutral detergent fiber in whole-plant corn silage:Taking Zhengda 12 in Ningxia as an example

作　　者：任丽娟 卜登攀[1] 王建平[2] 陈雅坤 单丽燕[3] 王昆[4] 王思伟[4] 赵连生[1] REN Lijuan;BU Dengpan;WANG Jianping;CHEN Yakun;SHAN Liyan;WANG Kun;WANG Siwei;ZHAO Liansheng(Institute of Animal Science,Chinese Academy of Agricultural Science,Beijing 100193,China;Henan University of Science and Technology,College of Animal and Technology,Luoyang 471000,Henan,China;National Livestock General Station,Beijing 100125,China;Grain and Oil Crop Research Institute of Hebei Academy of Agricultural and Forestry Sciences,Shijiazhuang 050035,Hebei,China)

机构地区：[1]中国农业科学院北京畜牧兽医研究所/动物营养学国家重点实验室,北京100193 [2]河南科技大学动物科技学院,河南洛阳471000 [3]全国畜牧总站,北京100125 [4]河北省农林科学院粮油作物研究所,河北石家庄050035

出　　处：《草业科学》2020年第12期2584-2593,共10页Pratacultural Science

基　　金：国家重点研发计划(2018YFD0501600);中国农业科学院科技创新工程协同创新任务(CAAS-XTCX2016011-01);中国农业科学院科技创新工程(ASTIP-IAS07);奶牛产业技术体系北京市创新团队(BAIC06-2020);河北省重点研发计划“奶牛粗饲料营养精准评定及高效利用技术研发与集成应用(19226616D)”;河北省农林科学院创新工程“不同粗饲料来源奶牛日粮高效利用技术研究(4-04-03)”。

摘　　要：以宁夏地区不同产地的23份正大12全株玉米(Zea mays)青贮饲料为研究对象,应用灰色关联度方法分析30 h中性洗涤纤维降解率(NDFD30)与营养成分的关联程度,并建立由营养成分预测30 h中性洗涤纤维降解率的回归模型,从而探讨影响全株玉米青贮饲料30 h中性洗涤纤维降解率的关键因素,为改善粗饲料的利用效率及提高奶牛的生产性能提供依据。结果表明,全株玉米青贮饲料的营养成分与30 h中性洗涤纤维降解率的关联程度由大到小表现为粗蛋白质>粗脂肪>粗灰分>碳水化合物>中性洗涤纤维>酸性洗涤纤维>木质素>干物质>淀粉。全株玉米青贮饲料的30 h中性洗涤纤维降解率与干物质、粗蛋白质、酸性洗涤纤维、木质素、粗灰分呈负相关关系,与中性洗涤纤维、碳水化合物、淀粉、粗脂肪呈正相关关系。建立的30 h中性洗涤纤维降解率与营养成分之间的回归模型R2为0.912,有效影响因素由大到小依次是木质素、粗脂肪、粗蛋白质、中性洗涤纤维、粗灰分。综上所述,粗蛋白质、粗脂肪、粗灰分及中性洗涤纤维是影响30 h中性洗涤纤维降解率的关键因素。Taking 23 Zea mays silages from different production areas in Ningxia as the research object,the grey correlation method was used to analyze the correlation degree between the 30-hour neutral detergent fiber degradation rate(NDFD30)and the nutritional components.In addition,a regression model was constructed for predicting the NDFD30 according to the nutrient components.This was done to explore the key factors that affect the NDFD30 of whole corn silage to provide a basis for improving the utilization efficiency of roughage and the production performance of dairy cows.The results showed that the order of the degree of correlation between the nutrient composition and NDFD30 was crude protein>crude fat>crude ash>carbohydrate>neutral detergent fiber>acid detergent fiber>lignin>dry matter>starch.The NDFD30 of corn silage was negatively correlated with the dry matter,crude protein,acid detergent fiber,lignin,and crude ash,and positively correlated with the neutral detergent fiber,carbohydrates,starch,and crude fat.The R2 of the regression model between the NDFD30 and nutrients was 0.912,and the effective influencing factors were lignin,crude fat,crude protein,neutral detergent fiber,and crude ash.In summary,crude protein,crude fat,crude ash,and neutral detergent fiber are the key factors that affect the NDFD30.

关 键 词：正大12全株玉米青贮 30 h中性洗涤纤维降解率 营养成分 影响因素 灰色关联度 多元回归 

分 类 号：S816.53[农业科学—饲料科学]