摘要
为明确施肥类型和种植年限对冻融期稻田土壤温室气体排放的影响,采用静态暗箱-气相色谱法测定了春季解冻期延边地区不同种植年限和施肥条件下稻田土壤CO2、CH4和N2O的释放通量。结果表明:春季解冻期不同种植年限和施肥类型稻田土壤的CO2释放量均表现出随解冻进程而逐渐增强特征。单施有机肥稻田CO2的排放量分别比单施化肥和化肥与有机肥配施提高17.87%和35.39%,排放潜力大。在单施化肥情况下,种植60年的稻田比80年和120年稻田具有更强的CO2排放潜力。春季解冻期间CO2排放通量与土壤温度呈显著正相关,而与土壤湿度呈显著对数关系。稻田单施化肥显著促进了稻田土壤CH4的净排放,且种植60年的稻田比80年和120年稻田具有更强的CH4释放能力。施用有机肥能显著提高稻田土壤N2O的排放量,且单施化肥条件下,种植80年稻田解冻期N2O总排放量分别比60年和120年稻田增加601.51%和6.97%,表现出更高的N2O排放能力。
In order to determine the effects of fertilization types and planting years on soil greenhouse gas emissions in the freezing-thawing period,the release fluxes of CO2,CH4 and N2O in the paddy field soil under different planting years and fertilization conditions in Yanbian during the spring thawing period were determined by the static black-box gas chromatography.The results showed that CO2 release of paddy soil increased gradually with the thawing process in different planting years and fertilization types during the spring thawing period.CO2 emission of paddy field with single application of organic fertilizer increased by 17.87%and 35.39%,respectively,compared with those with single application of chemical fertilizer and application of chemical fertilizer combined with organic fertilizer,with great emission potential.In the case of chemical fertilizer application alone,the paddy field cultivated for 60 years had stronger CO2 emission potential than the paddy field cultivated for 80 years and 120 years.There was a significant positive correlation between CO2 emission flux and soil temperature,and a significant logarithmic correlation between CO2 emission flux and soil water content during thawing period.The net emission of CH4 in paddy field was significantly increased by applying chemical fertilizer alone,and the CH4 release capacity of paddy field cultivated for 60 years was stronger than that of paddy field cultivated for 80 years and 120 years.The application of organic fertilizer can significantly increase N2O emission of paddy soil.Under the condition of chemical fertilizer alone,the total N2O emission of paddy field in 80 years increased by 601.51%and 6.97%compared with paddy field for 60 years and 120 years during thawing period,respectively,showing higher N2O emission capacity.
作者
辛贵民
刘春海
吴明根
傅民杰
XIN Guimin;LIU Chunhai;WU Minggen;FU Minjie(College of Agronomy,Yanbian University,Yanji 133002,China)
出处
《吉林农业大学学报》
CAS
CSCD
北大核心
2020年第6期669-678,共10页
Journal of Jilin Agricultural University
基金
国家重点研发计划项目(2018YFD0300206-2)
吉林省科技厅重点科技研发项目(20180201076SF)
国家自然科学基金项目(31560202,31160103)
关键词
施肥类型
种植年限
温室气体
排放通量
fertilization type
planting years
greenhouse gas
emission flux
