---

作 者 ：张小川,蔡蔚祺,徐琪

期 刊 ：生态学报 1990年 10卷 2期 页码：109~115

关键词：干草原；土壤植被系统；物质分配；元素循环；吸收；释放；

Keywords:grassland ecosystem, soil-vegetation component, allocation, cycling of element, release, uptake.,

摘 要 ：本文研究了内蒙古锡林河流域两类典型草原中Si、Al、Fe和Mn在生态系统各分室中的分配和循环。结果表明,各分室中元素的贮量顺序为:Si>Al>Fe>Mn,且其贮量在年度之间有变动。草原生态系统中元素的很小一部分贮存于生物系统中,而生物系统中元素的绝大部分贮存于根系中。内蒙古锡林河流域两类草原生态系统经过一年的运转,输出量大于输入量,生物系统中大部分元素的贮量减少。 各元素在生态系统各分室间的循环量大小顺序与其贮量大小顺序相符。生物活体对Si、Al、Fe和Mn的年总吸收量在羊草草原分别为28.8、5.19、3.15和0.183g·m~(-2)·a~(-1),在大针茅草原分别为13.4、2.27、1.14和0.0567g·m~(-2)·a~(-1);生态系统中元素的年矿化量在羊草草原分别为94.1、16.1、10.5和0.39g·m~(-2)·a~(-1),在大针茅草原分别为57.3、9.12、5.24和0.157g·m~(-2)·a~(-1),释放/吸收比大于1。

Abstract:The allocation and cycling of Si, Al, Fe and Mn among compartments of two typical grassland ecosystems in Xilin River Basin, Inner-Mongolia, were studies in this paper.The results showed that the order of the amount of elements Stored in the compartments of the two ecosystems was: Si>Al>Fe>Mn, and that the amount of elements stored in the compartments was different from year to year. It was found that only a few amount of the elements in the ecosystem was Stored in the organo-systems, moreover, most of whic...

---