• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Atmospheric environment >Subsurface watering resulted in reduced soil N_2O and CO_2 emissions and their global warming potentials than surface watering
【24h】

Subsurface watering resulted in reduced soil N_2O and CO_2 emissions and their global warming potentials than surface watering

机译：地下灌溉比地面灌溉减少了土壤N_2O和CO_2的排放及其全球变暖的潜力

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Water management is an important practice with significant effect on greenhouse gases (GHG) emission from soils. Nitrous oxide (N2O) and carbon dioxide (CO2) emissions and their global warming potentials (GWPs) from subsurface watering soil (SUW) were investigated, with surface watering (SW) as a control. Results indicated that the N2O and CO2 emissions from SUW soils were somewhat different to those from SW soil, with the peak N2O and CO2 fluxes from SUW soil reduced by 28.9% and 19.4%, and appeared 72 h and 168 h later compared with SW. The fluxes of N2O and CO2 from SUW soils were lower than those from SW soil in both pulse and post pulse periods, and the reduction was significantly (p 0.05) in pulse period. Compare to SW, the cumulative N2O and CO2 emissions and its integrative GWPs from SUW soil decreased by 21.0% (p 0.05), 15.9% and 18.0%, respectively. The contributions of N2O to GWPs were lower than those of CO2 during most of time, except in pulse emission periods, and the proportion of N2O from SUW soil was 1.4% (p 0.1) lower that from SW soil. Moreover, N2O and CO2 fluxes from both watering treatments increased exponentially with increase of soil water-filled pore space (WFPS) and tempeiature. Our results suggest that watering soil from subsurface could significantly reduce the integrative greenhouse effect caused by N2O and CO2 and is a promising strategy for soil greenhouse gases (GHGs) mitigation. And the pulse period, contributed most to the reduction in emissions of N2O and CO2 from soils between SW and SUW, should be a key period for mitigating GHGs emissions. Response of N2O and CO2 emissions to soil WFPS and temperature illustrated that moisture was the dominant parameters that triggering GHG pulse emissions (especially for N2O), and temperature had a greater effect on the soil microorganism activity than moisture in drier soil. Avoiding moisture and temperature are appropriate for GHG emission at the same time is essential for GHGs mitigation, because peak N2O and CO2 emission were observed only when moisture and temperature are both appropriate.
机译：水资源管理是一项重要的实践，对土壤的温室气体（GHG）排放有重大影响。研究了地下浇水土壤（SUW）中的一氧化二氮（N2O）和二氧化碳（CO2）排放及其全球变暖潜能（GWP），以地面浇水（SW）为对照。结果表明，SUW土壤的N2O和CO2排放量与SW土壤的排放有所不同，SUW土壤的N2O和CO2通量峰值分别降低了28.9％和19.4％，与SW相比分别出现了72h和168h。在脉冲期和脉冲后时期，SUW土壤的N2O和CO2通量均低于SW土，并且在脉冲期间降低显着（p <0.05）。与西南SW相比，SUW土壤累积的N2O和CO2排放量及其综合GWP分别减少了21.0％（p <0.05），15.9％和18.0％。 N2O对GWPs的贡献在大多数时间内都比CO2低，除了脉冲排放期，SUW土壤中N2O的比例比SW土壤低1.4％（p> 0.1）。此外，两种灌溉方式的N2O和CO2通量都随着土壤充水孔隙空间（WFPS）和温度的升高而呈指数增长。我们的结果表明，从地下浇水可以显着减少N2O和CO2引起的综合温室效应，并且是缓解土壤温室气体（GHGs）的有前途的策略。脉冲周期是减少西南SW和SUW之间土壤N2O和CO2排放量最大的贡献，应该是减少温室气体排放的关键时期。 N2O和CO2排放对土壤WFPS和温度的响应表明，水分是触发GHG脉冲排放的主要参数（尤其是N2O），温度比干燥土壤中的水分对土壤微生物活性的影响更大。同时避免湿气和温度对于减少温室气体排放至关重要，因为只有在湿气和温度都合适的情况下才能观察到N2O和CO2排放峰值。

著录项

  • 来源
    《Atmospheric environment》 |2018年第1期|248-255|共8页
  • 作者

    Wei Qi; Xu Junzeng; Yang Shihong; Lia Linxian; Jin Guangqiu; Li Yawei; Hameed Fazli;

  • 作者单位

    Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing 210098, Jiangsu, Peoples R China;

    Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing 210098, Jiangsu, Peoples R China;

    Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing 210098, Jiangsu, Peoples R China;

    Hohai Univ, Coll Water Conservancy & Hydropower Engn, Nanjing 210098, Jiangsu, Peoples R China;

    Hohai Univ, Coll Water Conservancy & Hydropower Engn, Nanjing 210098, Jiangsu, Peoples R China;

    Hohai Univ, Coll Water Conservancy & Hydropower Engn, Nanjing 210098, Jiangsu, Peoples R China;

    Hohai Univ, Coll Water Conservancy & Hydropower Engn, Nanjing 210098, Jiangsu, Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    N2O; CO2; Comprehensive emissions; Greenhouse effect; Subsurface watering;

    机译：N2O;CO2;综合排放;温室效应;地下灌溉;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号