石灰对铅污染菜园土壤的修复效果试验研究

在未污染的花岗岩砖红壤中加入重金属Pb，平衡2周后在污染土壤上施用不同水平的石灰改良刺，以小白菜作为指示作物，根据小白菜生长动态变化和收获后生物量、Pb吸收量、土壤pH、土壤中有效Pb含量等理化性质的差异，来评价各种改良剂对Pb污染砖红壤的改良效果，以便为海南花岗岩砖红壤Pb污染修复提供理论依据。试验结果表明：石灰的5个水平均对Pb污染土壤有一定的修复效果，不同程度地减轻小白菜的毒害症状。5个水平与土壤中有效铅和小白菜根茎叶铅含量成反比，高水平效果最好，该处理的小白菜不仅生物量高，而且Pb含量较低。

Study on the Effect of Lime to the Plumbum Polluted Garden Soil

The methods of adding the heavy metal Pb into unpolluted Granitic latosol in Hainan was adopt, and added lime of modifier after 2 fortnights＂ equilibrium. Brassica chinensis was taken as instruction crops, and according to its different quality of physics and chemistry such as growth dynamic change and the biomass of the harvest, the absorbing capacity of the heavy metal, the soil pH, the content of heavy metal in the soil, the improvement effects of each kind of modifiers to the plumbum （Pb） polluted in Granitic latosol were tested to be provided as the reference for improving the Pb polluted in Hainan Granitic latosol. The results indicated that the Pb pollution soil could be remedied by each modifier and the poison symptom of Brassica chinensis could be reduced. The best treatment was the high level of lime, the Brassica chinensis had higher biomass and lower Pb content, next treatment was calcium magnesium phosphate processing.