科尔沁地区植物种多样性对沙地草场生产力影响的研究

应用生态学报 ›› 2000, Vol. ›› Issue (3): 395-398.

科尔沁地区植物种多样性对沙地草场生产力影响的研究

常学礼¹, 赵哈林¹, 杨持², 徐杰²

1. 中国科学院寒区旱区环境与工程研究所, 兰州730000;
2. 内蒙古大学生态与环境科学系, 呼和浩特010021

收稿日期:1999-05-10 修回日期:1999-10-22 出版日期:2000-05-25
通讯作者: 常学礼,1963年出生,博士,副研究员.主要从事恢复生态学和景观生态学的研究,已发表论文45篇.E-mail:resdiv@ns.lzb.ac.cn
基金资助:
国家“九五”重点科技项目(96-920-13-02);国家自然科学基金(49601020、39760020)资助项目

Influence of plant species diversity on productivity of sandy grassland in Kerqin Region

CHANG Xueli¹, ZHAO Halin¹, YANG Chi², XU Jie²

1. Cold and Arid Regions Environment and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000;
2. Department of Ecology and Environmental Sciences, Inner Mongolia University, Huhehaote 010021

Received:1999-05-10 Revised:1999-10-22 Online:2000-05-25

摘要/Abstract

摘要： 对科尔沁沙地草场不同物种多样性指数与草地生产力关系的研究表明,依据植物种多样性指数和生产力的关系可分为两类,其中功能多样性和组成多样性为一类,最高生物量变化于299～336g·m^-2,为简单的一元线性关系,相关性显著.种丰富度和SW指数为一类,最高生物量变化于426～433g·m^-2,与沙地草场生产力关系较复杂,曲线类型为抛物线型,相关性较显著.同时,种丰富度、SW指数、功能多样性和组成组样性与沙地草场生产力的灰色关联分析表明,组成多样性指数对沙地草场生产力影响最大,SW指数最小,依据灰色关联度排序依次为组成多样性(0.74);功能多样性(0.72);种丰富度(0.66)和SW指数(0.14).可以认为沙地草场改良应建立在种的引进(增加种丰富度)和引进种所产生的组成(生活型)多样性上.

关键词: 物种多样性, 生产力, 沙地草场, 科尔沁地区

Abstract: The relationship between species diversity indices and sandy grassland productivity was studied in Kerqin sandy land, and the results showed that the relations could be divided in to two categories based on the indices and productivity.The first type includes function and composition diversities, their maximal biomass varied form 299 to 336g穖^-2, and had a simple linear relation with the productivity. Their correlation coefficient was remarkably significant.The species richness and Shannon-Wiener indices attribute to second type, their maximal biomass varied from 426 to 433 g穖^-2, and had a complex parabola relations with the productivity. Their correlation coefficient was also significant.Meanwhile,the grey correlation analysis showed that the species composition diversity index was the most important factor that influences productivity.According to the grey correlation degree, the order of the different indices affecting productivity was:composition diversity(0.74),function diversity (0.72),species richness (0.66) and Shannon-Wiener index (0.14).It is suggested that increasing plant species richness (species introduction) and consequent composition diversity could be the practices of improving the degraded grassland in Kerqin.

Key words: Species diversity, Productivity, Sandy grassland, Kerqin region

常学礼, 赵哈林, 杨持, 徐杰. 科尔沁地区植物种多样性对沙地草场生产力影响的研究[J]. 应用生态学报, 2000, (3): 395-398.

CHANG Xueli, ZHAO Halin, YANG Chi, XU Jie. Influence of plant species diversity on productivity of sandy grassland in Kerqin Region[J]. Chinese Journal of Applied Ecology, 2000, (3): 395-398.

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