【摘要】 针对重庆市蔬菜重金属污染现状,选取Hg、Cd、Pb为优先控制的目的重金属,通过盆栽实验探讨了施用石灰、腐植酸、硫化钠等化学添加剂后对土壤重金属在植物体内分配的影响,为蔬菜基地土壤重金属污染控制提供可靠的技术措施。研究结果表明,石灰对Cd在植物体内的分配随用量不同而变化;腐植酸能有效抑制Hg在植物体内的富集,使植物茎、叶中Pb的分配系数明显降低;而硫化钠使植物茎中Hg的分配系数下降明显。更多还原

【Abstract】 In view of the current situation of vegetable’s heavy metal pollution in Chongqing, Hg, Cd and Pb are among the target heavy metals of preferential control. Pot experiments were employed to elucidate the distribution of heavy metals in plants after applying chemical additives, such as limestone, humusand, sodium sulfide, etc. The reliable technical measures were also put forward to control the pollution of heavy metals in vegetable base. The effect of limestone on the distribution of Cd in plants varied with different use levels. Humus could restrain Hg accumulation in plants effectively and reduce the coefficient of distribution of Pb in stem and leaf obviously. The coefficient of distribution of Hg in the part of stem reduced obviously when sadium selenite was added.更多还原