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呼伦贝尔草原风蚀坑及下风侧积沙区植被小群落特征
引用本文:满良,哈斯,张萍,阎旭,夏显东.呼伦贝尔草原风蚀坑及下风侧积沙区植被小群落特征[J].应用生态学报,2008,19(10):2177-2181.
作者姓名:满良  哈斯  张萍  阎旭  夏显东
作者单位:1.北京师范大学资源学院, 北京 100875;2.内蒙古师范大学生命科学与技术学院,呼和浩特 010022
摘    要:采用传统样方法,调查了呼伦贝尔草原固定风蚀坑、半裸露风蚀坑和裸露风蚀坑及其积沙区的植被小群落,并对野外数据进行了统计学分析.结果表明:3种风蚀坑及积沙区植被小群落盖度都小于原生植被大针茅群系盖度,并随着固定风蚀坑、半裸露风蚀坑、裸露风蚀坑的顺序依次下降.固定风蚀坑小群落由无茎委陵菜和糙隐子草占优势,分盖度为5%.半裸露风蚀坑中未被风蚀区小群落以无茎委陵菜和苔草占优势,分盖度为2%;积沙区小群落以无茎委陵菜、冰草、糙隐子草和百里香占优势,分盖度为4%.裸露风蚀坑无植被或仅西南坡出现沙蓬占优势的小群落.裸露风蚀坑积沙区中部以沙蓬占优势,分盖度为4.7%;在其边缘沿顺风向依次以冰草(2.7%)、苔草(2.6%)和百里香(1.7%)占优势.物种重要值平均值在固定风蚀坑、半裸露风蚀坑和裸露风蚀坑分别为12.64%、13.38%和20.08%,在半裸露风蚀坑积沙区、裸露风蚀坑积沙区中部和边缘分别为12.55%、40.48%和11.15%.

关 键 词:温室番茄  水分利用效率  秸秆还田  灌水下限  
收稿时间:2007-10-17

Micro-community characteristics of vegetations in blowouts and depositional areas of Hulunbuir grassland, Inner Mongolia.
MAN Liang,HASI Eerdun,ZHANG Ping,YAN Xu,XIA Xian-dong.Micro-community characteristics of vegetations in blowouts and depositional areas of Hulunbuir grassland, Inner Mongolia.[J].Chinese Journal of Applied Ecology,2008,19(10):2177-2181.
Authors:MAN Liang  HASI Eerdun  ZHANG Ping  YAN Xu  XIA Xian-dong
Institution:1.College of Resources Science and Technology, Beijing Normal University, Beijing 100875, China;2.College of Life Science and Technology, Inner Mongolia Normal University, Huhhot 010022, China
Abstract:By using traditional sampling methods, the micro-communities of vegetations in fixed, semi-bare, and bare blowouts of Hulunbuir grassland were investigated, and the investigation data were statistical analyzed. The results showed that the vegetation coverage decreased in the order of fixed blowout, semi-bare blowout, and bare blowout, and was lower than that of the primary vegetation Form. Stipa grandis. Potentilla acaulis and Kengia squarrosa were the dominant species in fixed blowout, with the coverage being 5%; while P. acaulis and Carex sp. were the dominant species in semi-bare blowout, with the coverage being 2%. The dominant species in depositional areas of semi-bare blowout were P. acaulis, K. squarrosa, Agropyron cristatum, and Thymus mongolicus, and the coverage was 4%. The dominant species on the southwest slope of bare blowout was Agriophyllum pungens. The middle depositional area of bare blowout was also occupied by A. pungens (coverage 4.7%), and the edge of it was dominated by A. cristatum (coverage 2.7%), Carex sp. (coverage 2.6%), and T. mongolicus (coverage 1.7%) from the edge of the depositional area to primary grassland. The mean species importance value in fixed, semi-bare, and bare blowouts was 12.64%, 13.38%, and 20.08%, while that in the depositional area of semi-bare blowout and in the middle and edge of bare blowout was 12.55%, 40.18%, and 11.15%, respectively.
Keywords:irrigation lower limit  straw returning  water use efficiency  greenhouse tomato  
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