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1、圆园16,35(10):2019-2025农业环境科学学报2016年10月允燥怎则灶葬造燥枣粤早则燥鄄耘灶增蚤则燥灶皂藻灶贼杂糟蚤藻灶糟藻易琼,黄旭,张木,等.氮肥施用水平及种类对生菜产量及菜地N2O排放的影响[J].农业环境科学学报,2016,35(10):2019-2025.YIQiong,HUANGXu,ZHANGMu,etal.Effectsofnitrogenapplicationrateandsourcesonyieldoflettuceandnitrousoxideemissioninvegetablesoil[J].允燥怎
2、则灶葬造燥枣粤早则燥-耘灶增蚤则燥灶皂藻灶贼杂糟蚤藻灶糟藻,2016,35(10):2019-2025.氮肥施用水平及种类对生菜产量及菜地N2O排放的影响*易琼,黄旭,张木,黄巧义,逄玉万,唐拴虎(广东省农业科学院农业资源与环境研究所/农业部南方植物营养与肥料重点实验室/广东省养分资源循环利用与耕地保育重点实验室,广州510640)摘要:采用静态箱-气相色谱法研究了氮肥施用水平及种类对生菜产量和土壤N2O排放的影响。试验设7个处理:不施氮肥(N0),施氮112.5kgN·hm-2(N1),施氮225kgN·hm-2(N2),施氮337.5
3、kgN·hm-2(N3),控释氮肥(CRU-N2),稳定性氮肥(SN-N2),有机无机氮肥配施(MN-N2)。对比研究了不同施氮水平和等氮量不同氮种类处理对N2O排放特征和生菜产量的影响。结果表明,随着氮肥用量的增加N-22O排放通量增加。在试验条件下,生菜获得最高产量时的施氮量为125kgN·hm,适量降低生菜施氮水平能有效降低N2O气体累积排放量。相同氮水平下,SN-N2与MN-N2处理较N2处理分别增产达13.3%和17.2%,但差异未达显著水平。SN-N2处理NO排放总量和NO排放系数仅为0.80kgN·hm-2和0.36%,较常
4、规施肥处理分别降低了84.8%和1.97个百分点。综上,22在不降低生菜产量的前提下,优化氮肥施用水平并采用稳定性氮肥技术是菜地N2O减排和减少蔬菜种植氮素损失的重要途径。关键词:生菜;氧化亚氮;施氮量;减排措施;排放系数中图分类号:X511文献标志码:A文章编号:1672-2043(2016)10-2019-07doi:10.11654/jaes.2016-0471Effectsofnitrogenapplicationrateandsourcesonyieldoflettuceandnitrousoxideemissioninvege
5、tablesoilYIQiong,HUANGXu,ZHANGMu,HUANGQiao-yi,PANGYu-wan,TANGShuan-hu*(InstituteofAgriculturalResourcesandEnvironment,GuangdongAcademyofAgriculturalSciences/KeyLaboratoryofPlantNutritionandFertilizerinSouthRegion,MinistryofAgriculture/GuangdongKeyLaboratoryofNutrientCycli
6、ngandFarmlandConservation,Guangzhou510640,China)Abstract:Closed-chambertechnologywithgaschromatographymethodwasusedtostudytheeffectsofdifferentnitrogen(N)applicationratesandsourcesontheyieldoflettuceandnitrousoxide(N2O)emissionsfromvegetablesoil.Seventreatmentswereincludi
7、ngzeroNfertil原ization(N0),112.5kgN·hm-2(N1),225kgN·hm-2(N2,conventionalfertilization),337.5kgN·hm-2(N3),controlledreleaseurea(CRU-N2),stabilityNfertilizer(SN-N2),integratechemicalandmanureNfertilizer(MN-N2).TheeffectsofdifferentNlevelsandNsourceswiththesameamountofNonchar
8、acteristicsofN2Oemission,yieldoflettucewerecomparativelystudied.ResultsshowedthattheN2Oemis原sion