首页> 外文OA文献 >CH4 and N2O dynamics of a Larix gmelinii forest in a continuous permafrost region of central Siberia during the growing season
【2h】

CH4 and N2O dynamics of a Larix gmelinii forest in a continuous permafrost region of central Siberia during the growing season

机译:生长季节西伯利亚中部连续多年冻土区兴安落叶松林的CH4和N2O动态

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

Forest soils are generally sinks of CH4 and sources of N2O. To characterize the dynamics of these major greenhouse gases in central Siberia during the growing season, we measured fluxes from forest soil and assessed the relationships between CH4 and N2O fluxes and forest floor vegetation types, soil temperature, and moisture conditions. At the soil surface, both CH4 uptake and emission (-6.6 to 3.1 μg CH4-C m-2 h-1) were observed, and CH4 fluxes did not differ among vegetation types. CH4 flux was positively correlated with soil moisture, but not with soil temperature. The small CH4 uptake compared with previous reports was due to CH4 production in response to high precipitation. N2O was also emitted and taken up by soil (-0.2 to 0.4 μg N2O-N m-2 h-1), and N2O fluxes did not differ among vegetation types. N2O flux was negatively correlated with soil moisture and not correlated with soil temperature. Our findings suggest that high soil moisture and low availability of mineral nitrogen resulted in N2O uptake due to denitrification. Furthermore, both CH4 and N2O were emitted from a river at the site; these were produced in the basin of the riverbank rather than deep in the soil.
机译:森林土壤通常是CH4的汇和N2O的来源。为了表征西伯利亚中部这些主要温室气体在生长季节的动态,我们测量了森林土壤的通量,并评估了CH4和N2O通量与森林地面植被类型,土壤温度和湿度条件之间的关系。在土壤表面,CH4的吸收和排放(-6.6至3.1μgCH4-C m-2 h-1)均被观察到,并且CH4通量在不同植被类型之间没有差异。 CH4通量与土壤水分呈正相关,但与土壤温度无正相关。与以前的报告相比,少量的CH4吸收是由于对高降水量产生的CH4产生的。 N2O也被排放并吸收到土壤中(-0.2至0.4μgN2O-N m-2 h-1),并且N2O通量在不同植被类型之间没有差异。 N2O通量与土壤水分呈负相关,与土壤温度无关。我们的发现表明,高土壤湿度和矿物质氮的低利用率会导致反硝化作用吸收N2O。此外,CH4和N2O都从该地点的一条河流中排放出来。这些是在河岸盆地而不是在土壤深处产生的。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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