在封闭的垃圾填埋场种植的树木排放的一氧化二氮

IF 1.6 Q4 ENVIRONMENTAL SCIENCES AIMS Environmental Science Pub Date : 2023-01-01 DOI:10.3934/environsci.2023018
A. Fraser-McDonald, C. Boardman, T. Gladding, S. Burnley, V. Gauci
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引用次数: 0

摘要

生长在自然和管理环境中的树木有能力将地下产生的温室气体输送到大气中。一氧化二氮(N2O)的排放已在自然生态系统中的树干中观察到,但尚未在森林覆盖的前垃圾填埋场中进行测量。通过对英国一个封闭的垃圾填埋场和一个类似的自然场地的茎和土壤N2O排放进行量化调查,解决了这一研究空白。在四个月的时间里,通过通量室和气相色谱法进行了测量。分析结果表明,填埋区和非填埋区N2O茎流平均通量分别为0.63±0.06 μg m-2 h-1和0.26±0.05 μg m-2 h-1。原填埋地N2O排放呈季节性变化,N2O通量随填埋地N2O采样位置的增加而减少。树干排放占填埋场N2O地表总通量的1%,低于干洪针叶林树干排放对地表总通量的贡献。
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Nitrous oxide emissions from trees planted on a closed landfill site

Trees growing in natural and managed environments have the capacity to act as conduits for the transport of greenhouse gases produced belowground to the atmosphere. Nitrous oxide (N2O) emissions have been observed from tree stems in natural ecosystems but have not yet been measured in the context of forested former landfill sites. This research gap was addressed by an investigation quantifying stem and soil N2O emissions from a closed UK landfill and a comparable natural site. Measurements were made by using flux chambers and gas chromatography over a four-month period. Analyses showed that the average N2O stem fluxes from the landfill and non-landfill sites were 0.63 ± 0.06 μg m–2 h–1 and 0.26 ± 0.05 μg m–2 h–1, respectively. The former landfill site showed seasonal patterns in N2O stem emissions and decreasing N2O fluxes with increased stem sampling position above the forest floor. Tree stem emissions accounted for 1% of the total landfill N2O surface flux, which is lower than the contribution of stem fluxes to the total surface flux in dry and flooded boreal forests.

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来源期刊
AIMS Environmental Science
AIMS Environmental Science ENVIRONMENTAL SCIENCES-
CiteScore
2.90
自引率
0.00%
发文量
31
审稿时长
5 weeks
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