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《Journal of Northeast Normal University (Natural Science Edition)》 2003-01
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Comparison of main plants' module morphological characteristics under neighborhood interference in Leymus chinensis grasslands

BA Lei, WANG DeliLaboratory for Vegetation Ecology of Education Ministry,Institute of Grassland Science, Northeast Normal University, Changchun 130024,China)  
The module morphological characteristics of Leymus chinensis, Phragmites communis and Kalimeris integrifolia were measured and analyzed by sampling randomly in thirty sites. To explore the mechanism of competition among main plant species on grasslands in Changling County. Fifty L.chinensis plants in each L.chinensis, L.chinensis + Ph.communis and L. chinensis + K.integrifolia community, twenty K.integrifolia plants in each K.integrifolia, L.chinensis+ K.integrifolia and Ph.communis + K.integrifolia community were taken respectively. Twenty Ph.communis plants in each Ph.communis, L.chinensis+Ph.communis and K.integrifolia +Ph.communis were sampled. The individual height, leave length, leave width, leave number and internode's distance of L.chinensis, Ph.communis were measured respectively, as well as the individual height, shoot length, shoot number and shoot distribution pattern (aggregation distribution, regular distribution) for K.integrifolia. The data on plant characteristics were analyzed by SPSS package. The experimental results showed that the module morphological characteristics of L. chinensis, Ph.communis and K.integrifolia changed under the interaction among coexisting plants and the hierarchy of competition for light were formed as followed: Ph.communisK.integrifoliaL.chinensis. However, the hierarchy did not mean that  L.chinensis had disadvantage in competition. The trade-off between adaptation and interaction were achieved by the vegetative propagation. The plasticity of plant module morphological characteristics was affected by the light resource, the interactive relationship and the adaptation to environment.
【Fund】: 国家自然科学基金资助项目(30070545 30270251);; 优秀青年教师资助计划;; 教育部科学技术重点研究项目(00043)
【CateGory Index】: Q948.122.1
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