【摘要】 上海城市园林土壤的阳离子交换量(CEC)多集中在10~20cmol/kg,与土壤的理化性质:有机质、pH、黏粒含量、体积质量、通气孔隙度都存在极好的相关关系,能够综合反映土壤的肥力水平、保肥能力和缓冲能力。在城市绿地土壤的综合评价中应加入CEC这一评价指标。上海土壤CEC的控制标准可定在≥14cmol/kg。更多还原

【Abstract】 CECs of garden soils in Shanghai ranges between 10 ~ 20 cmol/kg and are significantly correlated with OM, pH, clay content, bulk density and soil aeration, so CEC is a good indicator of soil fertility, nutrient retention capacity and buffering capacity. It is, therefore, necessary to add CEC as an item to the index system for evaluation of urban garden soil quality and CEC of the gardens soils in shanghai should be controlled ≥14 cmol/kg.更多还原