水、氮控制对荒漠草原植物群落特征的影响  

Effects of Water and Nitrogen Supplementation on Plant Community in the Stipa breviflora Steppe

作　　者：郭蕊[1] 红梅[1] 韩国栋[1] 白文明[2] 赵巴音那木拉[1] 陈强 

机构地区：[1]内蒙古农业大学草原与资源环境学院,呼和浩特010019 [2]中国科学院植物研究所,北京100093 [3]杭锦后旗农业推广中心,内蒙古巴彦淖尔015400

出　　处：《内蒙古大学学报（自然科学版）》2016年第4期426-433,共8页Journal of Inner Mongolia University：Natural Science Edition

基　　金：国家"973"项目(2010CB833502);内蒙古自治区高等学校科学研究项目(NJZC061)资助项目

摘　　要：以短花针茅荒漠草原为研究对象,设置了增雨施氮(WN)、增雨不施氮(W)、减雨施氮(RN)、减雨不施氮(R)、单独施氮(N)、自然状况(CK)6个处理,分析控制降雨量以及氮素添加对植被群落特征的影响,结果表明:(1)控制性降雨和氮素添加对群落组成、重要值产生了一定的影响.(2)增雨处理,显著提高了荒漠草原物种的多样性和均匀度(P<0.05).(3)减雨施氮处理,提高了荒漠草原物种丰富度、使优势度指数上升.增雨施氮处理,有利于降低群落的生态优势度.(4)增雨施氮处理显著增加了群落地上生物量(P<0.05).The current study focused on the plant of community of stipa breviflora grassland under six different treatments,which were water and nitrogen supplement（WN）,water supplement（W）,rainwater reduction and nitrogen supplement（RN）,rainwater reduction（R）,nitrogen supplement（N）and control（CK）,and the effect of water and nitrogen supplementation on the plant community was investigated.The results were as follows：1）water control and nitrogen supplement had impacts on the community composition and important values,2）water supplement significantly increased the species diversity and evenness（P〈0.05）,3）water reduction and nitrogen supplement increased the species richness and dominant index while water and nitrogen supplement reduced the dominant index.4）water and nitrogen supplement significantly increased the aboveground biomass（P〈0.05）.

关 键 词：水、氮控制 荒漠草原 群落特征 

分 类 号：S812.4[农业科学—草业科学]