不同肥料不同作物对Cd污染土壤中酶活性及Cd含量的影响

以玉米、蓖麻、向日葵为供试材料,采用盆栽试验探讨在1 mg· kg1Cd胁迫下,不同施肥条件下3种作物对土壤4种酶活性及重金属Cd含量的影响.结果表明,3种作物中,玉米对Cd污染土壤修复效果最好.施用菌肥和腐植酸均可减少土壤中的Cd含量,和CK比较,Cd含量降低了1.16％～10.33％.施用肥料后,土壤中脲酶活性较CK土壤提高了8.042％～350.429％,蔗糖酶活性较CK土壤提高了7.998％～39.885％,碱性磷酸酶活性较CK土壤提高了2.809％～13.999％,过氧化氢酶活性较CK土壤提高了9.333％～35.163％.施用菌肥和腐植酸可显著提高土壤的酶活性.

Effect of Three Different Crops Treated with Different Fertilizers on Soil Enzyme Activity and the Residual Cd Content in the Cd Contaminated Soil

Using the maize, castor, and sunflower as materials, the present pot experiments were conducted to study the influence of different plants applied with different fertilizers on the soil enzyme activity and residual Cd content in the soil pre-treated with Cd at 1 mg · kg^- 1. The results showed that the maize was the most effective plant to reduce the Cd contaminant in the soil among three different types of crops. Employing the humic acid and bacterial manure could decrease the content of Cd at the range of 1.16% to 10.33% ,compared with the control treatment. Four different en- zyme activities in fertilizer treated soil, including the urease activity, invertase acticity, alkaline phosphates activity, and catalase activity were increased from 8. 042% to 350. 429%, 7. 998% to 39. 885%, 2. 809% to 13. 999%, and 9. 333% to 35. 163%, respectively, compared with the control group.