| 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,2023,42(8):63-72. |
| 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,2023,42(8):63-72. |
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| 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分析方法，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排放量的影响没有显著差异，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、地下滴灌对CH4排放量的影响没有显著差异。沟灌方式下，土壤温度T是影响土壤CO2排放的关键因素，铵态氮、土壤温度和土壤充水孔隙度（WFPS）是影响土壤N2O排放的关键因素；漫灌方式下，硝态氮是影响土壤CO2排放的关键因素，铵态氮、土壤温度和土壤充水孔隙度是影响土壤N2O排放的关键因素；喷灌方式下，土壤充水孔隙度是影响土壤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，硝态氮和土壤充水孔隙度是影响土壤N2O排放的关键因素；滴灌方式下，硝态氮、铵态氮和土壤充水孔隙度是影响土壤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：10.13522/j.cnki.ggps.2023024 |
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| Effects of Irrigation Methods on Greenhouse Gas Emissions from Arid Farmlands: A Meta-analysis |
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SONG Juanjuan, GAO Xiaodong, CAI Yaohui, YU Liuyang,
SONG Xiaolin, LI Changjian, ZHAO Xining
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1. Ministry of Education Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Northwest A & F University, Yangling 712100, China; 2. College of Water Resources and Architectural Engineering, Northwest A & F University, Yangling 712100, China; 3. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China; 4. College of Horticulture, Northwest A & F University, Yangling 712100, China
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| Abstract: |
| 【Objective】Irrigation methods modulate soil water and root-induced activity thereby influencing gas emissions from soil. In this paper, we analyze the effects of different irrigation methods on greenhouse gas emissions from farmland and the associated underlying mechanisms.【Method】The analysis was based on meta-analysis. Experimental results published in journals included in CNKI and Web of Science were used in the analysis. A total of 37 papers with 176 datasets were analyzed to assess the variation in greenhouse gas emissions with irrigation methods, as well as the underlying mechanisms.【Result】Compared to drip irrigation, flood irrigation, furrow irrigation and subsurface drip irrigation did not show significant difference in CO2 emissions, while sprinkler irrigation significantly increased CO2 emissions (p<0.05). Flood irrigation, furrow irrigation and sprinkler irrigation increased N2O emissions (p<0.05), but no significant difference between subsurface drip irrigation and drip irrigation was found in N2O emissions. There was no significant difference in CH4 emissions between different irrigation methods. In furrow irrigation, soil temperature was the key factor influencing CO2 emissions. Soil NH4+, temperature, and soil water-filled pore space (WFPS) were the key factors affecting N2O emissions. Soil NO3- played a pivotal role in CO2 emissions in flood irrigation, while soil NH4+, temperature, and soil water content influenced N2O emissions most. Sprinkler irrigation predominantly influenced soil WFPS and hence N2O emissions. Subsurface drip irrigation impacted soil temperature and hence CO2 emissions; soil NO3- and WFPS combined influencing N2O emissions. Drip irrigation influenced soil NO3- and NH4+, WFPS and soil temperature, thereby affecting CO2 and N2O emissions.【Conclusion】Replacing sprinkler irrigation and traditional flood irrigation and furrow irrigation by drip irrigation in arid regions can reduce greenhouse gas emissions from soils. |
| Key words: irrigation method; soil water distribution; greenhouse gas emission; Meta-analysis |
