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| Effects of water-saving ridge cultivation on greenhouse gas emissions and yield in paddy fields |
| Received:October 22, 2024 |
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| KeyWord:ridge box cultivation;greenhouse gas;moisture management;water-soluble organic carbon;inorganic nitrogen |
| Author Name | Affiliation | E-mail | | XIE Feipeng | College of Agronomy, Hunan Agricultural University, Changsha 410128, China | | | YE Yumeng | College of Agronomy, Hunan Agricultural University, Changsha 410128, China | | | ZHOU Wentao | College of Agronomy, Hunan Agricultural University, Changsha 410128, China | | | LIU Wen | College of Agronomy, Hunan Agricultural University, Changsha 410128, China | | | LONG Pan | College of Agronomy, Hunan Agricultural University, Changsha 410128, China | | | XU Ying | College of Agronomy, Hunan Agricultural University, Changsha 410128, China | | | FU Zhiqiang | College of Agronomy, Hunan Agricultural University, Changsha 410128, China | zqf_cis@126.com |
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| Abstract: |
| In order to clarify the effects of water-saving irrigation ridge and box cultivation on greenhouse gas emissions and yield in paddy fields, this experiment was carried out in 2022 to explore the effects of ridge and box water-saving cultivation（RWS and CWS）on the cumulative emissions of CH4 and N2O, global warming potential, yield, and the content of water-soluble organic carbon（WDOC）and inorganic nitrogen in paddy fields. Relationship between greenhouse gas emissions and WDOC and inorganic nitrogen content under watersaving cropping mode. The results showed that compared with the CK treatment, the cumulative N2O emissions of RWS and CWS treatments increased by 54.72% and 16.98%, respectively, while the cumulative emissions of CH4 decreased by 31.63% and 27.72%, respectively, and the global warming potential decreased by 31.62% and 27.70%, and the emission intensity decreased by 36.09% and 30.83%, respectively. The yield of RWS and CWS treatment increased by 7.11% and 4.78% compared with that of CK treatment. Correlation analysis showed that CH4 emissions were significantly positively correlated with WDOC and NH+4-N, but negatively correlated with nitrate nitrogen under different cultivation patterns. N2O emissions were positively correlated with NH+4-N, NO-3-N and WDOC content. From the perspective of total effect, RWS and CWS treatments are beneficial to increase rice yield and effectively reduce greenhouse gas emissions in paddy fields. Therefore, water-saving cultivation in ridges and compartments is a cultivation method to achieve high yield of rice and reduce greenhouse gas emissions. |
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