重金属在土壤-作物体系中的累积行为研究(Ⅰ)——造纸污泥堆肥农用的重金属污染研究

Accumulation Behavior of Heavy Metals in Crops and Soil—the Pollution of Heavy Metals Caused by Using Paper Mill Sludge Compost in Agriculture

选取造纸污泥堆肥作为菜园土肥源进行盆栽实验,通过种植油菜和芦荟,着重研究了施加造纸污泥堆肥后作物和土壤中的重金属含量分布。盆栽实验显示施加堆肥可以增加作物的生物量,提高土壤肥力:重金属测定结果表明,添加造纸污泥堆肥的土壤,其重金属含量符合标准规定,且作物中的重金属含量远远低于我国蔬菜质量标准规定值。在一定时期内农田施用造纸污泥堆肥不会造成重金属污染。

The garden soil containing pulp and paper mill sludge compost （every kg garden soil mixes 250g sludge compost） was used to investigate the accumulation behavior of heavy metals in crops and soil in basin experiment. The results showed that sludge compost can enhance the fertility of the soil and increase the growth mass of the crops. The heavy metal content of the soil containing sludge compost is in accord with the national soil environmental quality standard, and the heavy metal content in the crops is much lower than the allowance of the vegetable quality standard. The utilization of pulp and paper mill sludge compost for certain time will not cause any heavy metal pollution.