无牧草原生态系统营养元素的生物地球化学特征

应用生态学报 ›› 2003, Vol. ›› Issue (2): 219-222.

无牧草原生态系统营养元素的生物地球化学特征

耿元波, 章申, 董云社, 孟维奇

中国科学院地理科学与资源研究所环境生物地球化学与健康实验室, 北京 100101

收稿日期:2001-01-08 修回日期:2001-11-28 出版日期:2003-02-15
通讯作者: 耿元波,男,1969年出生,博士,助理研究员,主要从事环境生物地球化学方向的研究,已发表论文10余篇.E-mail:gyb0741@sina.com.
基金资助:
国家自然科学基金项目(49971005);中国科学院地理科学与资源研究所知识创新领域前沿项目(CXIOGA0006,GXIOGE010301);中国科学院知识创新工程重大资助项目(KZCX1SW0104)

Biogeochemical characteristics of nutrient elements in ungrazed grassland ecosystem in Xilin River Basin

GENG Yuanbo, ZHANG Shen, DONG Yunshe, MENG Weiqi

Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China

Received:2001-01-08 Revised:2001-11-28 Online:2003-02-15

摘要/Abstract

摘要： 以内蒙古锡林河流域的两种优势草原群落羊草草原和大针茅草原为研究对象,探讨了中纬度地区未放牧情况下的草原生态系统植物营养元素的生物地球化学特征.结果表明,两类草原群落土壤植物系统中土壤分室N、P、K、S、Ca、Mg、Si的贮量远大于植物亚系统的贮量,地上活体和枯草分室的各元素贮量小于根分室.在两类草原群落中,N、P、K、S从枯草分室中消失的速率要大于Ca、Mg和Si.羊草草原的枯草分室元素流失量大于大针茅草原.研究区草原生态系统中,羊草草原物质的生物地球化学循环近于平衡状态,大针茅草原处于失衡状态.物质循环量羊草草原远大于大针茅草原.

Abstract: The biogeochemical characteristics of nutrient elements in Leymus chinensis community and Stipa grandis community, which were both scarcely disturbed by human activities, in Xilin River Basin, Inner Mongolia were studied. The results showed that the storage of N, P, K, S, Ca, Mg, and Si in the soil compartment of soil plant system was higher than that in the plant subsystem of two communities,and their storage in the live shoots compartment was lower than that in the litter compartment. The disappearing rate of N, P, Kand Sfrom the litter compartment was higher than that of Ca, Mg, and Si in the two grassland communities.The decomposition rate of litter in Leymus chinensis community was higher than that in Stipa grandis community. In the grassland soil plant system,the matter flowing mass kept balance in Leymus chinensis community, but lost balance in Stipa grandis community. The matter participating in biogeochemical cycling in Leymus chinensis community was more than that in Stipa grandis community.

中图分类号:

Q935

耿元波, 章申, 董云社, 孟维奇. 无牧草原生态系统营养元素的生物地球化学特征[J]. 应用生态学报, 2003, (2): 219-222.

GENG Yuanbo, ZHANG Shen, DONG Yunshe, MENG Weiqi. Biogeochemical characteristics of nutrient elements in ungrazed grassland ecosystem in Xilin River Basin[J]. Chinese Journal of Applied Ecology, 2003, (2): 219-222.

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