在未污染的花岗岩砖红壤中加入重金属Pb，平衡两周后在污染土壤上施用不同水平的钙镁磷肥、牛粪、钙镁磷肥＋牛粪等改良剂，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。实验结果表明：各改良剂对Pb污染土壤都有一定的修复效果，不同程度的减轻了小白菜的毒害症状，其中钙镁磷肥与牛粪配施处理效果最好，该处理的小白菜不仅生物量高，而且Pb含量较低；其次是钙镁磷肥处理，而改良效果最差的是牛粪，其植株叶片不仅稍有黄化症状，且Pb含量较高

Through the methods of adding the heavy metal Pb into unpolluted Granitic latosol in Hainan, after 2 fortnight’s equilibrium, adding lime, calcium magnesium phosphate, cow dung, calcium magnesium phosphate and the cow dung mixture match executes, taking Brassica chinensis as instruction crops, 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, we had appraised the improvement effects of each kind of modifiers to the Pb polluted in Granitic latosol. Then we could provide 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 Calcium magnesium phosphate and the cow dung mixture, the Brassica chinensis had higher biomass and lower Pb content next treatment was calcium magnesium phosphate processing.