| 孙国红,李剑睿,徐应明,秦旭,梁学峰,孙约兵,杨磊,董晋峰.不同水分管理下镉污染红壤钝化修复稳定性及其对氮磷有效性的影响[J].农业环境科学学报,2015,34(11):2105-2113. |
| 不同水分管理下镉污染红壤钝化修复稳定性及其对氮磷有效性的影响 |
| Effects of Water Management on Cadmium Stability and Nitrogen and Phosphorus Availability in Cadmium Polluted Red Soil After Immobilization Remediation |
| 投稿时间：2015-06-17 |
| DOI：10.11654/jaes.2015.11.010 |
| 中文关键词: 水分 生物碳 鸡粪 钝化修复 镉 土壤污染 |
| 英文关键词: water management biochar chicken manure immobilization remediation cadmium polluted soil |
| 基金项目:国家自然科学基金项目(21177068);中国农业科学院创新工程项目(2014-cxgc-xym);农业部产地环境质量重点实验室开放基金项目(2013-KFJJ-01);公益性行业(农业)科研专项(201203045) |
| 作者 | 单位 | E-mail | | 孙国红 | 天津农学院工程技术学院, 天津 300384 | | | 李剑睿 | 农业部产地环境质量重点实验室, 天津 300191
农业部环境保护科研监测所, 农田土壤重金属污染修复创新团队, 天津 300191 | | | 徐应明 | 农业部产地环境质量重点实验室, 天津 300191
农业部环境保护科研监测所, 农田土壤重金属污染修复创新团队, 天津 300191 | ymxu1999@126.com | | 秦旭 | 农业部产地环境质量重点实验室, 天津 300191
农业部环境保护科研监测所, 农田土壤重金属污染修复创新团队, 天津 300191 | | | 梁学峰 | 农业部产地环境质量重点实验室, 天津 300191
农业部环境保护科研监测所, 农田土壤重金属污染修复创新团队, 天津 300191 | | | 孙约兵 | 农业部产地环境质量重点实验室, 天津 300191
农业部环境保护科研监测所, 农田土壤重金属污染修复创新团队, 天津 300191 | | | 杨磊 | 天津农学院工程技术学院, 天津 300384 | | | 董晋峰 | 天津农学院工程技术学院, 天津 300384 | |
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| 中文摘要: |
| 采用连续两年盆栽试验,研究在不同水分管理(淹水灌溉、干湿交替灌溉和湿润灌溉)条件下,生物炭和鸡粪复配对红壤镉污染钝化修复效应和稳定性及其土壤氮磷有效性的影响机制.结果表明,经过连续两年钝化修复处理,与第一年实验各相应处理相比,第二年的稻谷产量增加幅度为2.7%~5.1%(P>0.05).长期淹水灌溉、干湿交替灌溉和湿润灌溉下,钝化处理后土壤交换态镉含量显著降低,连续两年钝化修复土壤有效镉含量间变化无显著性差异(P>0.05).钝化处理可以显著降低稻米中Cd含量,第一年降低率为34.5%~44.4%,第二年降低率为31.7%~45.0%,水稻根镉含量最大分别降低了33.6%和25.1%(P<0.05).钝化处理下,与对照组相比,长期淹水处理、干湿灌溉和湿润灌溉下水稻根表Fe(Ⅱ)含量分别增加27.3%、59.1%和65.0%(P<0.05).相关性分析表明,水稻根表Fe(Ⅱ)含量和根表Cd含量呈显著负相关性(r=0.61),糙米中Cd含量和根表Cd含量呈显著正相关性(r=0.56),与根表Fe(Ⅱ)含量呈显著负相关性(r=0.51).连续两年钝化修复,各处理的土壤碱解氮和有效磷含量间无显著变化. |
| 英文摘要: |
| Immobilization is a low cost technique of remediating heavy metal-polluted soils. However, the efficiency of this technique is greatly influenced by soil water, oxidation-reduction and pH. Here a two-year pot experiment was conducted to investigate the impact of different water management(continuous flooding, wet-dry cycling and moist irrigation) on immobilization stability and nitrogen and phosphorus availability of cadmium polluted red soil after immobilization remediation with biochar and chicken manure. Compared with wet-dry cycling irrigation, continuous flooding and moist irrigation inhibited the aboveground biomass of rice in non-remediated soils during two year period. In remediated soils, however, the yields of rice grains in the second year were 2.7%~5.1% higher than those of the first year. Remediation significantly decreased exchangeable Cd content under continuous flooding, wet-dry cycling and moist irrigation, but there was no statistical difference in soil Cd availability between two years(P>0.05). Immobilization resulted in 34.5%~44.4% and 31.7%~45.0% reduction in Cd concentrations in brown rice, and 33.6% and 25.1% decrease in root Cd, for the first and second year, respectively. The content of Fe(Ⅱ) on rice root surface under remediation treatments increased by 27.3%, 59.1% and 65.0%, respectively, in continuous flooding, wet-dry cycling and moist irrigation, as compared with non-remediated soils. Correlation analysis revealed a significant negative linear relationship between Fe(Ⅱ) and Cd contents in the root coating of rice(r=0.61). There was a positive relationship between Cd content in brown rice and root coating(r=0.56), but there was a negative relationship between Cd concentration in brown rice and Fe(Ⅱ) in root coating(r=0.51). No significant changes in the content of soil available nitrogen and phosphorus were found in two-year experiment. |
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