施肥对稻田湿地土壤碳氮磷库及其相关酶活变化的影响研究的中期报告.docx

施肥对稻田湿地土壤碳氮磷库及其相关酶活变化的影响研究的中期报告
摘要：
稻田湿地在全球生态系统中具有重要的地位。为了探究施肥对稻田湿地土壤碳氮磷库及其相关酶活变化的影响，本研究利用田间试验的方法，研究了施氮、施磷、施氮磷、不施肥等处理对稻田湿地土壤碳氮磷库及其相关酶活的影响。结果显示，施氮、施磷、施氮磷均使稻田湿地土壤碳、氮含量增加，磷含量有所下降；同时，不同施肥处理下，土壤中脲酶、过氧化物酶、酸性磷酸酶、脱氢酶的活性差异不大，而碳酸酶活性受到较大的影响。在不同的施肥处理下，碳酸酶活性的变化趋势也不同。施氮、施磷处理下，碳酸酶活性均有所提高，而施氮磷处理下，碳酸酶活性有所下降。因此，不同的施肥处理对稻田湿地土壤碳氮磷库及其相关酶活有不同的影响，需要依据土壤性质和农业生产的实际情况进行施肥方案优化和管理。
关键词：稻田湿地；施肥；土壤碳氮磷库；酶活性
Abstract:
Ricepaddywetlandsplayanimportantroleintheglobalecosystem.Inordertoexploretheimpactoffertilizationonthecarbon,nitrogen,andphosphorusstorageandrelatedenzymeactivityofricepaddywetlandsoil,thisstudyconductedafieldexperimenttoinvestigatetheeffectsofnitrogen,phosphorus,nitrogenandphosphorusfertilization,andnofertilizertreatmentonthesoilcarbon,nitrogen,andphosphorusstorageandrelatedenzymeactivity.Theresultsshowedthatnitrogen,phosphorus,andnitrogen-phosphorusfertilizationincreasedthecarbonandnitrogencontentofricepaddywetlandsoil,whilephosphoruscontentdecreased.Meanwhile,underdifferentfertilizationtreatments,thereislittledifferenceintheactivityofurease,peroxidase,acidphosphatase,anddehydrogenaseinthesoil,whiletheactivityofcarbonicanhydraseisgreatlyaffected.Thetrendofchangesincarbonicanhydraseactivityisalsodifferentunderdifferentfertilizationtreatments.Undernitrogenandphosphorusfertilization,carbonicanhydraseactivitywasincreasedwhileundernitrogen-phosphorusfertilization,theactivitywasdecreased.Therefore,differentfertilizationtreatmentshavedifferenteffectsonthecarbon,nitrogen,andphosphorusstorageandrelatedenzymeactivityofricepaddywetlandsoil,anditisnecessarytooptimizeandmanagethefertilizationprogrambasedontheactualconditionsofsoilpropertiesandagriculturalproduction.
Keywords:ricepaddywetlands;fertilization;soilcarbon,nitrogen,andphosphorusstorage;enzymeactivity.