紫花苜蓿的抗寒生理适应性研究  

The study on physiological adaptability to cold resistance of alfalfa

作　　者：陶雅[1] 玉柱[2] 孙启忠[1] 赵淑芬 

机构地区：[1]中国农业科学院草原研究所,内蒙古呼和浩特010010 [2]中国农业大学草地研究所,北京100094 [3]林西县草原工作站,内蒙古赤峰025250

出　　处：《草业科学》2009年第9期151-155,共5页Pratacultural Science

基　　金：现代农业产业技术体系建设专项资金;公益性行业(农业)科研专项经费项目(nyhyzx07-022);"十一五"国家科技支撑项目(2006BAD16B03;2006BAD04A04);农业部"948"项目(2006-G38);中央级公益性科研院所基本科研业务费专项资金(中国农业科学院草原研究所)

摘　　要：通过对3个紫花苜蓿Medicago sativa品种根部可溶性糖、全氮、丙二醛(MDA)、游离脯氨酸和游离氨基酸含量动态变化进行分析,研究它们与苜蓿抗寒性之间的关系。结果表明,苜蓿根内可溶性糖、全氮、游离脯氨酸和游离氨基酸含量会在秋冬季升高,并在整个冬季保持较高水平,春季返青时下降,苜蓿根内MDA含量在秋季升高,并随晚秋气温进一步下降而降低。此外,各紫花苜蓿品种综合测定的参数说明,阿尔冈金抗寒性最强,金皇后次之,甘农3号最差。The dynamic change of soluble sugar content, total nitrogen, malondialdehyde, free proline and free amino acid in root of three alfalfa （Medicago sativa） varieties were analyzed to find out their relationships with cold resistance of alfalfa. The results indicated that the content of soluble sugar, total nitrogen, free proline and free amino acid increased from late autumn and early winter, and kept higher level during the entire winter, then decreased in regreen time in the next spring, the content of malondialdehyde increased in autumn and decreased with the falling of temperature in late autumn. Moreover, the integrated determination parameters of all alfalfa varieties suggested that the cold-resistance of Algonquin was the best, Gold Empress took the second place, and Gannong No. 3 was the worst.

关 键 词：紫花苜蓿 抗寒性 生理适应性 

分 类 号：S541.901[农业科学—作物学]