摘要
地统计学是探讨自然环境要素空间异质性的有效工具,它适合于定量研究区域化变量的空间结构变异特征。湿地土壤氮素是时空连续的变异体,不论尺度大小均具有高度的空间异质性,而其变量又属于区域化变量,同时具有随机性和结构性特征。因15N示踪技术能够示踪氮素物质的踪迹,而用15N标记的示踪体在湿地土壤中运移时所产生的丰度变化又具有空间异质性,故可考虑将二者结合起来来定量探讨湿地土壤氮素的空间运移。在此,就试对这一问题进行了较为系统和完整的理论探讨。
Geostatistics is an effective tool to study the spatial heterogeneity of elements; it is suited to research quantitatively the characters of spatial structure variation of regionalized variable. The soil nitrogen in wetland is spatial and temporal successive variant, with higher spatial heterogeneity in any scale. The variable of soil nitrogen in wetland belongs to regionalized variable with its characters of randomness and constructive property. Because 15N trace technique can trace the movement track of nitrogen, and the changes of 15N abundance caused by the movement of 15N trace matter in wetland soil have spatial heterogeneity, we can combine Geostatistics with 15N trace technique to study quantitatively soil nitrogen spatial movement in wetland. In this paper, the author tries to have relative system and integrity theory study on this question.
出处
《中国农学通报》
CSCD
2005年第6期347-351,共5页
Chinese Agricultural Science Bulletin
基金
中国科学院知识创新工程重要方向项目(KZCX3-SW-332)
中国科学院知识创新工程重大项目专题(KZCX1-SW-01)
国家自然科学基金项目(90211003)资助
