| 引用本文: | 宋娟娟,高晓东,蔡耀辉,等.灌溉方式对旱区农田温室气体排放影响的Meta分析[J].灌溉排水学报,0,():-. |
| SONG juanjuan,GAO Xiaodong,CAI Yaohui,et al.灌溉方式对旱区农田温室气体排放影响的Meta分析[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 摘 要：【目的】综合评估不同灌溉方式对农田温室气体排放的影响，并分析其产生差异的驱动机制。【方法】本研究采用Meta-analysis方法，在中国知网和Web of Science搜集关于不同灌溉方式对温室气体排放的相关文献，共提取37篇文献，176组观测数据，分析了不同灌溉方式下温室气体排放的差异，并解释了土壤水分分布造成土壤环境因子变化进而导致温室气体排放产生差异的机制。【结果】与滴灌相比，漫灌、沟灌、地下滴灌对CO2的排放量没有显著差异，喷灌显著增加了CO2排放量（p<0.05）；漫灌、沟灌、喷灌显著增加了N2O排放量（p<0.05），但地下滴灌与滴灌相比，地下滴灌的N2O排放量没有显著差异；与滴灌相比，漫灌、沟灌、喷灌、地下滴灌不同灌溉方式对CH4排放量没有显著差异。沟灌方式下，土壤温度T是影响土壤CO2排放的关键因素，土壤NH4+-N铵态氮、土壤温度和土壤孔隙含水率（WFPS）是影响土壤N2O排放的关键因素；漫灌方式下，土壤NO3--N硝态氮是影响土壤CO2排放的关键因素，土壤NH4+-N铵态氮、土壤温度和土壤孔隙含水率土壤含水率是影响土壤N2O排放的关键因素；喷灌方式下，土壤孔隙含水率土壤含水率是影响土壤N2O排放的关键因素；地下滴灌方式下，土壤温度是影响土壤CO2排放的关键因素，土壤NO3-硝态氮-N和土壤孔隙含水率土壤含水率是影响土壤N2O排放的关键因素；滴灌方式下，土壤NO3--N硝态氮、土壤NH4+铵态氮-N和土壤孔隙含水率土壤含水率是影响土壤CO2、N2O排放的关键因素，另外，土壤温度也是影响土壤CO2排放的关键因素。【结论】建议旱区农田灌溉减少喷灌及漫灌、沟灌的使用，大范围推广滴灌及地下滴灌技术。 |
| 关键词: 灌溉方式；土壤水分分布；温室气体排放；Meta分析 |
| DOI： |
| 分类号:S275.9 |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目）；国家重点研发计划项目；陕西省重点研发计划项目；唐仲英基金会项目；中央高校基本科研业务费专项 |
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| Effects of Irrigation Methods on Greenhouse Gas Emissions from Farmland in Arid Regions: a global Meta-analysis |
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SONG juanjuan, GAO Xiaodong, CAI Yaohui, YU Liuyang, SONG Xiaolin, LI Changjian, ZHAO Xinig
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Northwest Agriculture and Forestry University
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| Abstract: |
| Abstract: 【Background】Irrigation methods will affect greenhouse gas emissions, but the driving factors of the differences are unclear. 【Objective】The objective is to comprehensively evaluate the effects of different irrigation methods on greenhouse gas emissions from farmland and to analyze the driving mechanism of the differences. 【Method】This study collected and screened the literatures on greenhouse gas emissions under different irrigation methods published in CNKI and Web of Science by using the Meta-analysis method. A total of 37 literatures and 176 groups of observation data were extracted to analyze the differences in greenhouse gas emissions under different irrigation methods and explain the mechanism by which soil water distribution causes changes in soil environmental factors and thus leads to differences in greenhouse gas emissions. 【Result】The results showed that compared with drip irrigation, there was no significant difference in CO2 emissions from flood irrigation, furrow irrigation and underground drip irrigation, but sprinkler irrigation significantly increased CO2 emissions(p<0.05). The flood irrigation, furrow irrigation and sprinkler irrigation increased N2O emissions(p<0.05), but there was no significant difference between subsurface drip irrigation and drip irrigation. Compared with drip irrigation, there was no significant difference in CH4 emissions among different irrigation methods. Under furrow irrigation, soil temperature was the key factor affecting soil CO2 emission, soil NH4+-N, temperature and soil water filled pore space (WFPS) were the key factors affecting N2O emission. Soil NO3--N was the key factor affecting CO2 emission in flood irrigation, while soil NH4+-N, temperature and soil pore water content were the key factors affecting N2O emission. Soil WFPS was the key factor affecting N2O emission in sprinkler irrigation. Under subsurface drip irrigation, soil temperature was the key factor that affect soil CO2 emission, while soil NO3--N and WFPS were the key factors that affect soil N2O emission. Under drip irrigation, soil NO3--N, NH4+-N and soil pore water content were the key factors affecting soil CO2 and N2O emissions. In addition, soil temperature was also the key factor affecting CO2 emission.【Conclusion】It is suggested to reduce the use of sprinkler irrigation and traditional irrigation (flood irrigation, furrow irrigation) for farmland irrigation in arid regions, and popularize drip irrigation and underground drip irrigation technology in a large scale. |
| Key words: irrigation methods; soil water distribution; greenhouse gas emissions; Meta-analysis |
