• 关键词：

• 基金项目：

• 杨居荣
• 北京师范大学环境学研究所

• 车宇瑚
• 北京师范大学环境学研究所

• 王华东
• 北京师范大学环境学研究所

• 摘要：本文通过重金属对农作物、土壤微生物、土壤动物的影响试验,探索了重金属污染对土壤生态系统的综合影响,并以土壤生产力(农作物产量)的降低作为土壤生态系统稳定性受到破坏的主要标志拟定土壤容量。 在建立土壤容量的数学模式上,利用图论工具建立了土壤容量的结构模型,将已有的等比级数的模型作为一个特例包括在内,为土壤容量模型的研究探索了一条新途径。 本文以As为重点,提出了北京地区农田土壤中As、Hg、Cd、Cr的土壤容量范围值,并对污染发展趋势进行了预测,为北京地区环境质量的控制与治理提供依据。

• Abstract：A survey of heavy metal pollution on soil ecosystem was made and reduction of soil productivity was used as an important sign of stability damage of soil ecosystem in working out of the soil capacity.In addition to the proposed mathematical model of soil capacity, graphic mathod was also applied to establish structural model of soil capacity. The original model of equiratio series as a special example was included. It may serve to open a new way of studying model of soil capacity.The authors use arsenic as the starting point and thus provided soil capacity limit of As, Hg, Cd and Cr in agricultural soil of Beijing region, and it may possibly be useful in predicting trends of pollution. Scientific basis for control and treatment of Beijing regional environmental quality was also provided.

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