生态与农村环境学报2018，Vol.34Issue(6)：547-553,7.DOI:10.11934/j.issn.1673-4831.2018.06.010
不同氮磷钾肥对海泡石钝化修复镉污染土壤的稳定性研究
Effects of Nitrogen, Phosphate and Potassium Fertilizer on In-situ Remediation of Cd Polluted Paddy Soil With Sepiolete.
摘要
Abstract
A two-year pot experiment was conducted to investigate effects of application of urea, NH4HCO3, SSP, CMP, KCl or K2SO4, (six common types of fertilizer) on Cd immobilization in remediation of Cd polluted soil with sepiolite. Re-sults show that Cd concentration in brown rice decreased by 41. 4% in the first year and 32. 7% in the second. The appli-cation of NH4HCO3and CMP decreased the Cd concentration in brown rice by 28. 4% and 26. 9% in the first year and by 2. 1% and 11. 4% in the second, respectively, while the pa of SSP and KCl increased the Cd concentration in brown rice in both years by 31. 6% and 39. 3%, and by 9. 24% and 53. 8%, respectively. The application of Urea decreased the Cd concentration in brown rice by 49. 93% in the first year, but increased it by 23. 51% in the second. The application of K2 SO4increased the Cd concentration in brown rice by 36. 57% in the first year, but decreased it by 3. 29% in the second. Besides, the effect of sepiolite immobilizing Cd was much higher in the first year than in the second, but was still good in the second in remedying the polluted soil. However, its effect was affected by application of fertilizers. In the first year its Cd immobilization coefficient dropped the least in the treatment of CMP and the most in the treatment of KCl, while in the second year, it dropped by 4. 54% and 10. 2%, respectively, in the treatment of urea and NH4HCO3. Nonetheless, CMP, SSP, KCl and K2SO4all increased the Cd immobilization coefficient to a varying extent. Considering the effects of different fertilizers on Cd concentration in brown rice and sepiolite immobilization of Cd, it is highly recommended to use NH4 HCO3, CMP and K2SO4in the process of remedying Cd contaminated soil with sepiolite.关键词
氮肥/磷肥/钾肥/海泡石/镉/钝化Key words
nitrogen/phosphate/potassium/sepiolite/cadmium/immobilization分类
资源环境引用本文复制引用
黄荣,徐应明,黄青青,谢忠雷,尹秀玲,秦旭..不同氮磷钾肥对海泡石钝化修复镉污染土壤的稳定性研究[J].生态与农村环境学报,2018,34(6):547-553,7.基金项目
中国农业科学院科技创新工程项目(2016-cxgc-xym) （2016-cxgc-xym）
农业部农业生态环境保护项目(2016-sthj-xym) （2016-sthj-xym）
天津市科技支撑计划(14ZCZDSF00004) （14ZCZDSF00004）
天津市农业科技成果转化与推广项目(201404100) （201404100）
