【摘要】 土壤环境容量是输入土壤生态系统污染物的最大允许负荷,此时该系统仍保持正常的结构和功能。汞对土壤生态和人体健康的毒性颇大,因此研究其土壤容量具有一定的现实意义和理论价值。 本项研究以土壤生态为中心。根据我们建立的综合指标,即土壤-作物、土壤-微生物、土壤-水体系,确定了草甸棕壤汞的临界含量。运用平衡试验所获的参数计算了汞的年容量和变动容量。更多还原

【Abstract】 Soil environmental capacity is the maximum tolerable amount of pollutants inputed into a soil ecosystem,which still maintains its normal structure and functions. Mercury compounds have severe toxicity on soil ecosystems and human health, therefore investigation on soil capacity of mercury is of practical significance and theoretical value.This work is focused on soil ecology. Threshold values of mercury in meadow burozem were determined acceding to the comprehensive indexes, which were built up by us, e. g. soil-plant, soil-microbes and soil-water system. The annual capacity and alterable capacity of mercury were calculated with the parameters obtained from ballanced tests.更多还原