| 引用本文: | 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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| 摘要: |
| 【目的】在秸秆还田背景下，探究水稻泡田期温室气体的排放规律以及微纳米加气灌溉技术在稻田温室气体减排上的应用效果。【方法】开展土箱试验模拟水稻泡田环境，设置3个试验处理（秸秆不还田+常规水灌溉，CK；秸秆还田+常规水灌溉，ST；秸秆还田+微纳米加气灌溉，SO）。采用静态箱-气相色谱法对土箱中温室气体排放进行观测，分析CH4、N2O、CO2的排放通量以及全球增温潜势的变化趋势，探讨温室气体排放对秸秆还田和微纳米加气灌溉的响应规律。【结果】秸秆还田可显著提高水稻泡田期的N2O、CH4、CO2累计排放通量，ST处理下三种气体排放通量可分别提高30.67%、167.08%、76.95%；秸秆还田条件下，相对于常规水灌溉，微纳米加气灌溉条件下的CO2累计排放通量会略有提高，而N2O和CH4的累计排放通量可分别降低10.11%、32.63%；CK、ST、SO处理下的稻田温室气体全球增温潜势（GWP）分别为7.53 g/m2、14.14 g/ m2和12.14 g/ m2。【结论】秸秆还田会促进泡田期稻田土壤的温室气体排放，微纳米加气灌溉可以缓解这一负面影响，该技术对秸秆还田背景下稻田土壤温室气体减排具有积极作用。 |
| 关键词: 泡田期；秸秆还田；加气灌溉；温室气体；全球增温潜势 |
| DOI： |
| 分类号:S276.3 |
| 基金项目:国家重点研发计划子课题(2021YFD1700803-02)和江苏省自然科学基金青年项目(BK20200524) |
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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) |
