| Simulation of greenhouse gas emissions as affected by cultivation practices in rice fields |
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| DOI：10.7606/j.issn.1000-7601.2013.06.032 |
| Key Words: rice field greenhouse gas emission cultivation practices DNDC Model global warming potential(GWP) |
| Author Name | Affiliation | | SUN Yuan-yuan1,2, SUN Yong-jian3,4, YANG Zhi-yuan3,4, XU Hui3,4, MA Jun3,4, LI Shou-cheng2* | (1.中国气象局成都高原气象研究所, 四川 成都 610072
2.四川农业大学农学院， 四川 温江 611130
3.农业部西南作物生理、生态与耕作重点实验室, 四川 温江 611130
4.四川农业大学水稻研究所, 四川 温江 611130) |
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| Abstract: |
| Using the high resolution(1 m) IKONOS satellite and employing typical sampling and terrain→land use→land cover → comprehensive information extraction method, representative of the middle Jintang hilly area feature were selected. Detailed farmer investigations were carried out, including crop diversity, tillage, fertilizer, manure type, irrigationsoil pH, meteorological data. Emissions of CO2, N2O and CH4 emissions of rice fields with farmers crop production conditions simulated using DNDC model. In depth analysis of factors contributing to emissions of CO2, N2O, CH4, and global warming potential (GWP)was performed by changing a factor of production conditions of the winter water paddy rice field (winter paddy field area accounts for 58.07% of the area of research) in the target area. The results show that nitrogen fertilizer, organic fertilizer number and variety types, animal dung urine into quantity, middle-stage drainage, depth of cultivated fields, average temperature, rainfall, soil pH, content of soil organic matter, soil texture have significant influence on greenhouse gas emissions in paddy field. GWP of CO2, CH4, and N2O emissions of one year from three kinds of paddy field permanently flooded paddy fields (PF), rapeseed-paddy rice fields (RR) and winter wheat-paddy rice fields (RW) were in the order of RW＞RR＞PF. |
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