Effect of Organic Manure, Passivator and Their Complex on the Bioavailability of Soil Cd

• 作者: Xie Yunhe
• 来源期刊: 气象与环境研究：英文版
• 学科: 农学
• 关键词: 镉污染土壤 CD吸收 有机肥 钝化剂 复合物 生物利用度 生物有效性 水稻产量
• 年，卷（期）: 2015,（5）
• 页码范围: 48-52
• 页数: 5页
• 分类号: S511

摘要

A field experiment of organic manure,passivator and their complex was conducted to study the soil Cd bioavailability in the Cd polluted paddy soil. The results showed that the rice yield increased with the applications of organic manure,passivator and their complex,especially,the rice yields of applying 3 000 and 6 000 kg / hm2 of organic manure increased significantly by 18. 6%( P < 0. 05) and 20. 9%( P < 0. 05) because of the increase of rice economic coefficient. There had no significant change of the soil p H values and the soil available Cd contents,but the Cd distribution ratios in rice were lowered by applying organic manure,and the Cd contents of rice applying 3 000 and 6 000 kg / hm2 of organic manure dropped by 14. 3%( P > 0. 05) and 21. 4%( P > 0. 05) compared with chemical fertilizer treatment,respectively. But applying with passivator and passivator fertilized with 3 000 and 6 000 kg / hm2 of organic manure,the soil p H values increased and the soil available Cd contents decreased significantly,so that to restrain the rice's Cd absorption and accumulation. The rice Cd contents lowered by 28. 6%( P < 0. 05),28. 6%( P < 0. 05)and 42.9%( P<0.05),the stem Cd contents lowered by 8. 9%( P > 0. 05),29. 7%( P < 0. 05) and 43. 6%( P < 0. 05),and the leaf Cd contents decreased by 18. 8%( P < 0. 05),25. 0%( P < 0. 05) and 25. 0%( P < 0. 05),respectively. It enhanced the inactivate effect of passivator significantly when fertilized with organic manure.