| Cite this article: | 于笑天,袁鹤龙,李涛,等.加气与秸秆还田对水稻泡田期温室气体排放的影响[J].灌溉排水学报,2022,():-. |
| Yu Xiaotian,Yuan Helong,Li Tao,et al.加气与秸秆还田对水稻泡田期温室气体排放的影响[J].灌溉排水学报,2022,():-. |
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| Effects of Aerated Irrigation and Straw Returning on Greenhouse Gas Emissions of Paddy Fields during Soaking Period |
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Yu Xiaotian, Yuan Helong, Li Tao, LIJIANG, Jiao Xiyun
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College of Agricultural Science and Engineering, Hohai University
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| Abstract: |
| 【Objective】In order to explore the law of greenhouse gas emissions from paddy soil and the effects of aerated irrigation on greenhouse gas mitigation under straw returning conditions. 【Method】The soil box experiments were carried out to simulate the soaking environment of paddy fields with two kinds of irrigation water (conventional irrigation water and micro-nano aerated irrigation water). Combined with straw returning, there were three experiment treatments in this study, i.e., CK treatment (conventional irrigation without straw returning), ST treatment (conventional irrigation with straw returning) and SO treatment (micro-nano aerated irrigation with straw returning). Greenhouse gas emissions from paddy fields were observed based on Static Closed Chamber-GC Technique, CH4, N2O, CO2 emission fluxes and the trend of global warming potentials were analyzed. 【Result】The cumulative emission fluxes of N2O, CH4 and CO2 were significantly raised under straw returning conditions. For details, they were increased by 30.67%, 167.08% and 76.95%, respectively under ST treatment compared with CK treatment. Under straw returning conditions, the cumulative emission flux of CO2 with micro-nano aerated irrigation was slightly higher in micro-nano aerated irrigation, while the cumulative emission fluxes of N2O and CH4 under micro-nano aerated irrigations would be decreased by 10.11% and 32.63% compared with them in conventional irrigation. Global warming potential of greenhouse gases of paddy fields during soaking period under CK, ST and SO treatments were 7.53g/m2, 14.14g/m2 and 12.14g/m2, respectively. 【Conclusion】Greenhouse gas emission of paddy fields during soaking period would be promoted under straw returning conditions, while aerated irrigation could mitigate this negative effect. |
| Key words: Soaking Period; Straw Returning; Aerated Irrigation; Greenhouse Gas; Global Warming Potential (GWP) |
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