居群与生育期对达乌里胡枝子营养价值的影响  

Effects of Populations and Growth Stages on Nutritional Value of Lespedeza davurica

作　　者：赵祥[1] 邢毅[1] 董宽虎[1] 

机构地区：[1]山西农业大学动物科技学院草地研究所,山西太谷030801

出　　处：《中国草地学报》2010年第3期112-116,共5页Chinese Journal of Grassland

基　　金：国家"十一五"科技支撑计划课题(2007BAD56B01);(2008BADB3B01);国家农业科技成果转化资金项目(2009GB2A300043);公益性行业(农业)项目(nyhyzx07-022);山西省科学技术发展计划项目(20080312002-01);山西省科技基础条件平台建设项目(2005091006-0801);山西农业大学引进人才科研启动项目(XB2008018)

摘　　要：以来自山西与河南的8份达乌里胡枝子为研究对象,对其营养价值以及木质化程度进行研究。结果表明：从分枝期到结实期,粗蛋白质（CP）含量随生育期的推进而降低,8个居群之间存在显著差异（P〈0.05）;中性洗涤纤维（NDF）含量在盛花期达到最大（60.48%-66.75%）,8个居群之间差异显著（P〈0.05）;8个居群酸性洗涤木质素（ADL）含量上随着生育期的推进而升高,差异显著（P〈0.05）。达乌里胡枝子牧草生长发育早期,植株幼嫩,ADF和ADL含量低,易消化;生长发育后期,植株老化,ADF和ADL含量增加,消化率降低。来自河南2个居群的CP含量较低,植株木质化程度较高,8个居群中地处最北的山西右玉居群ADL含量最小。The experiment were conducted with eight populations of Lespedeza davurica from Shanxi and Henan.Nutritional nalue and lignification degree were studied.The results showed that content of crude protein（CP） declined with growth and development stage,there were significant differences among the eight populations（P0.05）.The content of neutral detergent fiber（NDF） was the highest（60.48%～66.75%）at blooming stage and there were significant differences among eight populations（P〈0.05）.The content of acid detergent lignin（ADL） increased with growth and development stage and there were significant differences among eight populations（P〈0.05）.The content of ADF and ADL was lower and the digestibility were higher at the early stage,but at the late stage,the content of ADF and ADL was higher and the digestibility were lower.The content of crude protein（CP） in 2 Lespedeza davurica populations from Henan were lower and lignification degree were higher.ADL content in population from Youyu,located in the most northern Shanxi province was the least among the 8 populations.

关 键 词：达乌里胡枝子 居群 生长期 营养成分 

分 类 号：S544.19[农业科学—作物学]