| 第一作者： | Wang, Xinyi |
|---|---|
| 英文第一作者： | Wang, Xinyi |
| 联系作者： | Zhu, Hui |
| 英文联系作者： | Zhu, Hui |
| 发表年度： | 2023 |
| 卷： | |
| 摘要： | Salinization and alkalization are global environmental issues, and a growing area of saline-alkali land has been developed as paddy fields. However, the information on the characteristics and driving mechanisms of greenhouse gas (i.e., methane (CH4), carbon dioxide (CO2) and nitrous oxide (N2O)) and ammonia (NH3) emissions from paddy fields with different saline-alkali levels is limited. We conducted a 137-day mesocosm experiment to investigate these issues using light (L), moderate (M), and heavy (H) saline-alkali soils with a history of reclamation of 20, 4 and 2 years, respectively. The results demonstrated that both the cumulative CH4 and NH3 fluxes in H treatment were significantly (p < 0.05) higher than L. While, the increasing saline-alkali levels reduced the cumulative CO2 and N2O fluxes, respectively. With the increasing saline-alkali levels, the species richness and diversity of microbial communities decreased. High saline-alkali level inhibited the growth of ammonia-oxidizing archaea, resulting in less N2O produced by nitrification, thus reducing N2O emission. Cumulative CH4 flux and the mcrA gene copy numbers showed a significant (p < 0.05) negative correlation. The gene copy number in H treatment was lower than M and L, respectively. The highest global warming potential and greenhouse gas intensity were observed in H treatment. Overall, recently reclaimed saline-alkali paddy field with an initial heavy saline-alkali level may be a hotspot of farmland CH4 and NH3 emissions, highlighting the necessity of optimizing water and fertilizer management for controlling these gas emissions at the initial stage of developing saline-alkali lands into paddy fields. |
| 刊物名称： | LAND DEGRADATION & DEVELOPMENT |
| 参与作者： | Wang, XY (Wang, Xinyi) [1] , [2] ; Lyu, J (Lyu, Jiao) [1] , [3] ; Zhu, H (Zhu, Hui) [1] ; Shutes, B (Shutes, Brian) [4] ; Xu, YY (Xu, Yingying) [3] ; Zhang, FM (Zhang, Fuman) [1] , [5] |
删除或更新信息，请邮件至freekaoyan#163.com(#换成@)
Reclaimed saline-alkali paddy field may be a hotspot of methane and ammonia emissions
本站小编 Free考研考试/2024-01-13
Reclaimed saline-alkali paddy field may be a hotspot of methane and ammonia emissions
相关话题/
领限时大额优惠券,享本站正版考研考试资料!
优惠券领取后72小时内有效，10万种最新考研考试考证类电子打印资料任你选。涵盖全国500余所院校考研专业课、200多种职业资格考试、1100多种经典教材，产品类型包含电子书、题库、全套资料以及视频，无论您是考研复习、考证刷题，还是考前冲刺等，不同类型的产品可满足您学习上的不同需求。 ...考试优惠券 本站小编 Free壹佰分学习网 2022-09-19
