城市垃圾填埋场覆盖蚓粪土对作物生长的影响研究

Study on Covering Excrement of Earthworm for the Effects of Growth of Plants on Municipal Waste landfill Sites

试验研究了在城市垃圾填埋场上覆盖蚓粪土、紫色土、垃圾渣土对三种作物的生长状态及品质的影响 ,结果表明三种作物在三种覆盖物中均可生长 ,且生长状况好 ,而尤以覆盖蚓粪土中作物生长快、生物产量和蛋白质含量高 ,作物可食部分的重金属含量未超标 ,作物品质好 ;但在覆盖紫色土和垃圾渣土中 ,作物可食部分的重金属含量部分或大部分超标 ,尤以覆盖垃圾渣土中超标最严重。可见蚓粪土宜作垃圾填埋场生态复垦的覆盖材料。

A studying on covering the excrement of erathworm,purple soil and rubbish for the effects of the growth and quality of three plants on municipal waste landfill sites,was carried out.The result showed that the plants could survive well.The plants grew best on covering the excrement of earthworm,the concentrations of protein and biomass in the crops were highest,and the concentrations of heavy metals in the edible part of plants were standards limited.But most of the concentrations of heave metals in the edible part of plants on civering the purple soil and the rubbish were exceeded the standards limited,especially on civering the rubbish.So the excrement of earthworm was recommended as covering materials for the ecological restoration of municipal waste landfill sites.