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时间:2017-05-20
《生物质炭不同施用量对设施菜地N2O及NOx排放的减排效应研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、中国科技论文在线http://www.paper.edu.cn生物质炭不同施用量对设施菜地N2O及#NOx排放的减排效应研究1222222**张要军,李舒清,张一荷,冯秀伟,闫嘉韫,刘树伟,邹建文5(1.河南大学生命科学学院,河南郑州,475004;2.江苏省低碳农业与温室气体减排重点实验室,南京农业大学资源与环境科学学院,江苏南京210095)摘要:设施菜地是N2O和NOx排放的主要人为排放源。生物质炭作为一种有效的N2O与10NOx减排措施受到了越来越多的关注。本研究主要通过田间原位试验,采用静态暗箱-气相色谱法田间原位同步观测N2O、NO和NO2的排放通量,探讨生物质炭不同
2、施用量对设施菜地系统N2O和NOx排放的影响效应。研究结果显示氮肥施用条件下N2O和NO排放量分别-1-1为11.26-14.07kgN2O-Nha和7.55-9.25kgNO-Nha。N2O排放与土壤湿度呈显著指数相关关系,NO-N/(N2O+NO)-N和NO-N/N2O-N与土壤湿度呈显著线性相关关系。N2O和15NO排放与土壤无机态氮含量呈显著线性相关关系。同时,在当地常规氮肥施用量下,生物-1-1-1质炭不同施用量对N2O减排效果依次为FB2(20tha)>FB3(40tha)>FB1(10tha),-1-1-1对NO减排效果依次为FB1(10tha)>FB2(20tha
3、)>FB3(40tha)。综合而言,生-1物质炭施用显著降低设施菜地系统N2O和NO排放量和排放系数,20tha生物质炭施用量对设施菜地N2O和NO综合减排潜力最为显著。20关键词:生物质炭;施用量;N2O;NOx中图分类号:X511EffectsofdifferentbiocharapplicationratesonN2OandNOxemissionsfromgreenhousevegetablefields1222225ZHANGYaojun,LIShuqing,ZHANGYihe,FENGXiuwei,YANJiayun,LIU22Shuwei,ZOUJianwen(1.S
4、choolofLifeScience,HenanUniversity,Zhengzhou475004;2.JiangsuKeyLaboratoryofLowCarbonAgricultureandGHGsMitigation,CollegeofResources&EnvironmentalSciences,NanjingAgriculturalUniversity,Nanjing210095)30Abstract:Greenhousevegetablesystemsplayanimportantroleintheland-atmospherefluxofgreenhousegas
5、es,whichareconsideredasamajoranthropogenicsourceofgreenhousegasesemission.Meanwhile,biocharhasreceivedmoreandmoreattentionasaneffectivemitigationactionofN2OandNOemissions.FieldexperimentswereconductedinourstudytoexploreandilluminatetheeffectsofdifferentbiocharapplicationratesonN2OandNOxemissi
6、onsfromgreenhousevegetablesystems.35N2OandNOxemissionfluxeswasmeasuredwithstaticopaquechamber-gaschromatograph(GC)method.TheresultsshowedthatthecumulativeN2OandNOemissionswithNfertilizerapplication-1-1were11.26-14.07kgN2O-Nhaand7.55-9.25kgNO-Nha,respectively.N2Oemissionshadasignificantlyexpon
7、entrelationshipwithsoilmoisture,whileNO-N/(N2O+NO)-NandNO-N/N2O-Nshowedasignificantlylinearrelationshipwithsoilmoisture.N2OandNOemissionsshowed40significantlylinearrelationshipwithsoilmineralN.ThebiocharmitigationeffectsonN2Owith-1-1-1differe
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