呼伦贝尔草原风蚀坑及下风侧积沙区植被小群落特征

应用生态学报

呼伦贝尔草原风蚀坑及下风侧积沙区植被小群落特征

满良^1,2;哈斯¹;张萍¹;阎旭¹;夏显东¹

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

收稿日期:2007-10-17 修回日期:1900-01-01 出版日期:2008-10-20 发布日期:2008-10-20

Micro-community characteristics of vegetations in blowouts and depositional areas of Hulunbuir grassland, Inner Mongolia.

MAN Liang^1,2; HASI Eerdun¹; ZHANG Ping¹; YAN Xu¹; XIA Xian-dong¹

¹College of Resources Science and Technology, Beijing Normal University, Beijing 100875, China;²College of Life Science and Technology, Inner Mongolia Normal University, Huhhot 010022, China

Received:2007-10-17 Revised:1900-01-01 Online:2008-10-20 Published:2008-10-20

摘要/Abstract

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

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.

Key words: irrigation lower limit, straw returning, water use efficiency, greenhouse tomato

满良^1,2;哈斯¹;张萍¹;阎旭¹;夏显东¹. 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.

MAN Liang^1,2; HASI Eerdun¹; ZHANG Ping¹; YAN Xu¹; XIA Xian-dong¹. Micro-community characteristics of vegetations in blowouts and depositional areas of Hulunbuir grassland, Inner Mongolia.[J]. Chinese Journal of Applied Ecology.

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