不同放牧强度下羊草叶片光合色素含量的差异性分析——以呼伦贝尔羊草草甸草原为例  

The content of photosynthetic pigments of Leymus chinensis at different grazing intensities——An example:Hulunber meadow steppe

作　　者：邓钰[1,2] 柳小妮[1] 辛晓平[2] 闫瑞瑞[2] 王旭[2] 杨桂霞[2] 任正超[1] 

机构地区：[1]甘肃农业大学草业学院/草业生态系统教育部重点实验室/甘肃省草业工程实验室/中-美草地畜牧业可持续发展研究中心,甘肃兰州730070 [2]中国农业科学院农业资源与农业区划研究所呼伦贝尔草原生态系统国家野外科学观测研究站,北京100081

出　　处：《草原与草坪》2012年第5期53-57,共5页Grassland and Turf

基　　金：公益性行业(农业)科研专项(201003019;201003061;200903060);现代农业产业技术体系建设专项;国家自然科学基金(30960264)资助

摘　　要：于2011年6月26日、7月23日和8月26日对不同放牧强度下,被采食羊草和未被采食羊草进行了光合色素含量的研究。在测试期间,被采食与未被采食羊草叶片的光合色素含量有显著差异;且前者的光合色素含量低于后者。随着放牧强度的增大,被采食羊草的叶片的叶绿素含量随着放牧强度增大呈复杂的变化趋势,后者则呈线性下降变化;而前者的类胡萝卜素呈上升趋势,后者呈下降—升高的趋势。二者Chl a+b最大值出现在7月23日,最小值出现在8月26日。此外,随着放牧强度的加强,二者的光合色素差异加剧,并受到生长季节的影响。The photosynthetic pigments of grazed and ungrazed Leymus chinensis were tested at different grazing intensities,on June 26th,July 23rd and August 26th,in 2011.Photosynthetic pigments of grazed and ungrazed Leymus chinensis have had significant differences during the testing period.The content of photosynthetic pigments of former were lower than the latter.The chlorophyll of grazed has presented complex trend with the increase of grazing intensities,while the changing pattern of ungrazed has showed linear decline.The carotenoid of grazed has expressed rising trend with the increase of grazing intensities,while the ungrazed has displayed fall,then upward tide.Their total content of chlorophyll a＋b have dropped with the increase of grazing intensities.The maximum appeared on July 23rd,the minimum on August 26th.Furthermore,their photosynthetic pigements have varied dramatically with the increasing of grazing intensities,which has been influenced by the growing season.

关 键 词：放牧强度 羊草叶片 光合色素 呼伦贝尔草甸草原 

分 类 号：S812[农业科学—草业科学] Q945.11[农业科学—畜牧学]