| Cite this article: | 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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| DOI： |
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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 |
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