径级与平茬对小叶锦鸡儿营养价值的影响  

Effect of Branch Diameter Classes and Stumping Methods on Nutrition of Caragana microphylla

作　　者：高琪[1] 李青丰[1] 王亮[1] 项敏 宁淑红 

机构地区：[1]内蒙古农业大学生态环境学院,内蒙古呼和浩特010019 [2]内蒙古库布齐沙漠技术研究院,内蒙古鄂尔多斯017418 [3]内蒙古鄂尔多斯市鄂托克旗饲料监督管理站,内蒙古鄂尔多斯017000

出　　处：《中国草地学报》2015年第4期53-58,共6页Chinese Journal of Grassland

基　　金：内蒙古自治区科技重大专项"库布齐沙漠生态综合治理及产业发展技术与示范"之课题2:库布齐沙漠资源产业开发技术研究(内研院2014003)

摘　　要：对小叶锦鸡儿不同径级枝条不同生长时间的营养变化以及平茬对其营养价值的影响进行了研究,结果表明:直径较小的枝条有较高的营养价值,宜作为饲料开发的主要部分;平茬后的小叶锦鸡儿粗蛋白质含量升高,酸性洗涤纤维和中性洗涤纤维含量降低,相对饲用价值升高;平茬的小叶锦鸡儿仅10月饲用价值较低,7月最高;未平茬的小叶锦鸡儿8月饲用价值较高,适宜平茬利用;小叶锦鸡儿9月植株产量高,营养总量最大,综合饲用价值和生物产量考虑,以9月采收为宜。The nutritional values of the Caragana microphylla in different size groups, in different times and the influence of stumping on the nutritional value were investigated,in order to provide basic in- formation for exploiting Caragana microphylla as animal feed. The results suggested that branches in smaller diameter had a higher nutritive value and was suitable for feed exploitation. Having been stumped, the Caragana microphylla had a significant increase in crude protein （CP） ,decrease in acid detergent fiber （ADF） and neutral detergent fiber （NDF）, and the relative feeding value （RFV） was increased as a result. The stumped plants had high RFVs in July, August and September, among which July was with the high- est level. Without stumping, it had the highest RFV in August. In September, plant had the highest bio- mass output and total quantity of nutrient content. Putting the nutritive level and the biomass output into overall consideration, September may be the most suitable time to stump for feeding utilization.

关 键 词：小叶锦鸡儿 营养价值 枝条径级 平茬 动态变化 

分 类 号：S816.5[农业科学—饲料科学]