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时间:2020-03-27
《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.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、2015,34(11):2105—2113农业环境科学学报2015年11月—————————————————————————_Jburnalof伽.EnvironmentScience●————————————————————————一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孙国红·,李剑睿z,一,徐应明2≯,秦旭2,3,梁学峰2,3,孙约兵2,3,杨磊1,董晋峰1(I.天津农学院工程技术学院,天津300384;2.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;3.农业部产地环境质量重点实验室,天津300191)摘要:采用连续两年盆栽试
2、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%一5.1%(P>o.05o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(尸>o.05o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%一44.4%,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%(P3、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%(尸.<0.05o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=o.56),与根表Fe(Ⅱ)含量呈显著负相关性(仁0。51o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。关键词:水分;生物碳;鸡粪;钝化修复;镉;土壤污染中图分类号:X53文献标志码:A文章编号:1672—2043(2015)ll也105—09doi:10.116540aes.2015.11.010Effe4、ctsofWaterManagementonCadmiumStabilityandNitrogenandPhosphorusAvailabilityinCadmiumPollutedRedSonAfterImmobilizationRemediationSUNGuo—hon91,LIJian—ruiz3,XUYing—ruin92z+,QINXu∞,LIANGXue-fengz3,SUNYue-bingz3,YANGLeil,DONGJin-fen91(1.CollegeofEngineeringandTechnology,TianjinAgriculturalUniversity,T5、ianjin300384,China;2.InnovativeTeamofRemediationforHeavyMetalContaminatedFarmland,Agro—EnvironmentalProtectionInstituteofMinistryofAgriculture,Tianjin300191,China;3.KeyIabo—ratoryofOriginalEnvironmentalQualityofMinistryofAgriculture,Tianjin300191,China)Abstract:Immobilizationisalowcosttechniqueo6、fremediatingheavymetal—poRutedsoils.However,theefficiencyofthistechniqueisgreatlyinfluencedbysoilwater,oxidation—reductionandpH.Hereatwo-yearpotexperimentwasconductedtoinvestigatetheimpactofdifferentwatermanagement(continuousflooding,wet—drycyclingandmoistirrigation)onimmobilizationstabilityandn7、itrogenandphos—phorusavailabilityofcadmiumpoHutedredsoilafterimmobilizationremediationwithbiocharandchickenmanure.Comparedwithwet-drycyclingirrigation,continuousfloodingandmoistirrigationinhibitedtheabovegroundbiomassofricei
3、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%(尸.<0.05o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=o.56),与根表Fe(Ⅱ)含量呈显著负相关性(仁0。51o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。关键词:水分;生物碳;鸡粪;钝化修复;镉;土壤污染中图分类号:X53文献标志码:A文章编号:1672—2043(2015)ll也105—09doi:10.116540aes.2015.11.010Effe
4、ctsofWaterManagementonCadmiumStabilityandNitrogenandPhosphorusAvailabilityinCadmiumPollutedRedSonAfterImmobilizationRemediationSUNGuo—hon91,LIJian—ruiz3,XUYing—ruin92z+,QINXu∞,LIANGXue-fengz3,SUNYue-bingz3,YANGLeil,DONGJin-fen91(1.CollegeofEngineeringandTechnology,TianjinAgriculturalUniversity,T
5、ianjin300384,China;2.InnovativeTeamofRemediationforHeavyMetalContaminatedFarmland,Agro—EnvironmentalProtectionInstituteofMinistryofAgriculture,Tianjin300191,China;3.KeyIabo—ratoryofOriginalEnvironmentalQualityofMinistryofAgriculture,Tianjin300191,China)Abstract:Immobilizationisalowcosttechniqueo
6、fremediatingheavymetal—poRutedsoils.However,theefficiencyofthistechniqueisgreatlyinfluencedbysoilwater,oxidation—reductionandpH.Hereatwo-yearpotexperimentwasconductedtoinvestigatetheimpactofdifferentwatermanagement(continuousflooding,wet—drycyclingandmoistirrigation)onimmobilizationstabilityandn
7、itrogenandphos—phorusavailabilityofcadmiumpoHutedredsoilafterimmobilizationremediationwithbiocharandchickenmanure.Comparedwithwet-drycyclingirrigation,continuousfloodingandmoistirrigationinhibitedtheabovegroundbiomassofricei
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