农业环境科学学报2017，Vol.36Issue(4)：783-792,10.DOI:10.11654/jaes.2016-1535
沼液灌溉对冬小麦-夏玉米轮作农田CO2、N2O排放规律的影响
Effects of biogas slurry irrigation on CO2 and N2O emission from winter wheat-summer maize rotation farm-land
摘要
Abstract
To investigate the effects of biogas slurry irrigation on CO2 and N2O emissions and soil physicochemical properties, in winter wheat-summer maize rotation system, five different irrigation modes were set up, including blank control(CK), fertilization treatment(CF), 2:1 biogas slurry irrigation for two times(one time in wheat season and one time in corn season)(T1), 2:1 biogas slurry irrigation for three times(two times in wheat season and one time in corn season)(T2)and 1:1 biogas slurry irrigation for three times(two times in wheat season and one time in corn season)(T3). In the study, Static-Gas Chamber method was applied to study the soil CO2 and N2O emission from win-ter wheat-summer maize rotation cropping system under the condition of marsh fluid biogas irrigation. The meteorological condition, soil ammonium nitrogen, nitrate nitrogen, soil soluble organic carbon and crop yield were also monitored. The characteristics of CO2 and N2O e-missions from cropland soil and their influencing factors were analyzed and discussed, and a reasonable biogas slurry irrigation model was put forward. The results showed that the biogas irrigation did not affect the seasonal variation of soil CO2 and N2O emission flux during the rotation cycle, however, it could cause the short-term emission increase after irrigation. The CO2 emission level was increased by different biogas slurry irrigation treatments in a certain extent, but the difference was not significant except T3. The biogas irrigation treatments did not improve the N2O emission level significantly. The content of soil soluble organic carbon was increased by biogas slurry irrigation treat-ments and was decreased with the application of chemical fertilizers. Compared with conventional fertilization treatment, there was no signif-icant difference between the crop yield of T2 and T3, but the yield of T1 was significantly decreased. Considering the crop yield and CO2 and N2O accumulated emissions, T2 treatment was the most reasonable biogas slurry irrigation mode under this study condition.关键词
沼液灌溉/冬小麦-夏玉米轮作/CO2/N2O/累积排放量/作物产量Key words
biogas slurry irrigation/winter wheat-summer maize rotation/CO2/N2O/cumulative emission/crop yield分类
资源环境引用本文复制引用
王小非,沈仕洲,尹高飞,闫建华,杜会英,张克强..沼液灌溉对冬小麦-夏玉米轮作农田CO2、N2O排放规律的影响[J].农业环境科学学报,2017,36(4):783-792,10.基金项目
国家自然科学基金项目(41371481) （41371481）
"十二五"科技支撑计划课题(2012BAD15B02) The National Natural Science Foundation of China(41371481) （2012BAD15B02）
The National Medical Science and Technology Foundation During the 12th Five-Year Plan Period of China(2012BAD15B02) （2012BAD15B02）
