Reclaimed saline‐alkali paddy field may be a hotspot of methane and ammonia emissions

Author:

Wang Xinyi12,Lyu Jiao13,Zhu Hui1ORCID,Shutes Brian4,Xu Yingying3,Zhang Fuman15

Affiliation:

1. Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences Changchun China

2. College of Resources and Environment University of Chinese Academy of Sciences Beijing China

3. Key Laboratory of Songliao Aquatic Environment, Ministry of Education Jilin Jianzhu University Changchun China

4. Department of Natural Sciences Middlesex University London UK

5. School of Life Sciences Northeast Normal University Changchun China

Abstract

AbstractSalinization 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.

Funder

Youth Innovation Promotion Association

Publisher

Wiley

Subject

Soil Science,General Environmental Science,Development,Environmental Chemistry

Cited by 3 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3