不同土壤改良剂对大豆富集重金属的影响

Effects of Different Soil Ameliorants on Soybean Accumulating Heavy Metals

在广西环江开展了土壤改良剂对大豆富集重金属的影响研究,结果表明:土壤改良剂(煤灰、菌渣、蚕沙)均能在大豆苗期、结荚期和成熟期有效降低大豆中重金属含量。菌渣对大豆苗期重金属抑制效果最好,蚕沙对成熟期重金属吸收的抑制效果最佳,而煤灰在结荚期抑制重金属效果优于其他的改良剂,并且对减少大豆籽粒中重金属含量作用效果最好。

A study was carried out to investigate the effects of soil ameliorants on the accumulation of heavy metals by soybean in Huanjiang of Guangxi. The results showed that all soil ameliorants （coal ash, fungi residues, silkworm excrement） decreased effectively heavy metal contents in soybean, during the seedling, podding and mature stages. The heavy metals inhibition effects were best for mushroom residue in seedling stage, for silkworm excrement in mature stage, for coal ash in podding stage. Coal ash also reduced most heavy metal contents in soybean grains.