研究了凹凸棒石(PAL)与LC-S01不同配比材料对土壤重金属钝化和降低作物吸收量的影响。结果表明，施PAL 4 500.0 kg/hm2时能有效提高苦荞产量，比对照增加20.4%。施LC-S01 1 500.0 kg/hm2 +凹凸棒石3 000.0 kg/hm2 时，苦荞根、茎、籽粒对重金属的吸收量不同程度地降低，籽粒中Cu、Zn、Cd和Pb的吸收量分别降低了23.5%、23.3%、43.9%和61.0%，具有修复重金属污染的积极作用。

The effects of different ratio of attapulgite (PAL) and LC-S01 on soil heavy metal passivation and reduce crop absorption were studied. The results showed that PAL could effectively increase the yield of Tartary buckwheat at 4 500.0 kg/hm2， which was 20.4% more than the control. When lC-SO1 was applied with 1 500.0 kg/hm2 + attapulgite 3 000.0 kg/hm2， the uptake of heavy metals in Tartary buckwheat roots， stems and grains decreased to different degrees， and the uptake of Cu， Zn， Cd and Pb in grains decreased by 23.5%， 23.3%， 43.9% and 61.0%， respectively， which had a positive effect on remediation of heavy metal pollution.

S517

2019年中央土壤污染防治专项资金投资计划项目“农用地土壤污染治理与修复试点”。