Soil methane (CH 4 ) fluxes in cropland with permanent pasture and riparian buffer strips with different vegetation #
Soil methane (CH 4 ) fluxes in cropland with permanent pasture and riparian buffer strips with different vegetation #
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DOI：
10.1002/jpln.202000473
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发表时间：
2021-12
影响因子：
2.5
通讯作者：
J. C. Dlamini;L. Cárdenas;E. Tesfamariam;R. Dunn;J. Hawkins;M. Blackwell;Jessica Evans;A. Collins
中科院分区：
文献类型：
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作者：
J. C. Dlamini;L. Cárdenas;E. Tesfamariam;R. Dunn;J. Hawkins;M. Blackwell;Jessica Evans;A. Collins
背景甲烷（CH 4）在100年内的全球变暖潜能值（GWP）是二氧化碳（CO2）的28倍。河岸缓冲带因其沿着农田的水质保护功能而被广泛应用，但其中的主要条件可能会增加包括CH 4在内的辐射性温室气体（GHG）的产生。然而，关于这些农业生态系统常见特征中土壤CH 4非故意排放的动态以及与农业土地的动态如何比较的信息很少。（草、杨柳和林地）植被以及无缓冲植被的对照，在重复的小区规模设施上使用静态箱技术进行了一项实验。2018年6月至2019年2月在英国北怀克的环境变量。结果所有处理下的土壤都是土壤CH 4与杨柳河岸缓冲区的汇（-2555 ± 318.7 g CH 4 ha-1）的土壤CH 4通量最低，其次是草河岸缓冲带（-2532 ± 318.7 g CH 4 ha-1），林地河岸缓冲区（-2318.0 ± 246.4 g CH 4 ha-1），无缓冲液对照（-1938.0 ± 374.4 g CH_4 ha ~（-1）），最后为上坡草地（-1328.0 ± 89.0 gCH 4 ha-1），具有较高的CH 4通量。这表明，他们可能有助于减少土壤CH 4通量到大气中类似的农业生态系统。
BackgroundMethane (CH4) has a global warming potential (GWP) 28 times that of carbon dioxide (CO2) over a 100‐year horizon. Riparian buffers strips are widely implemented for their water quality protection functions along agricultural land, but conditions prevailing within them may increase the production of radiative greenhouse gases (GHGs), including CH4. However, a few information is available regarding the dynamics of unintended emissions of soil CH4in these commonplace features of agroecosystems and how the dynamics compare with those for agricultural land.AimsTo understand the dynamics of soil CH4fluxes from a permanent upslope pasture and contiguous riparian buffer strips with different (grass, willow, and woodland) vegetation as well controls with no buffer vegetation, an experiment was carried out using the static chamber technique on a replicated plot‐scale facility.MethodsGas fluxes were measured periodically with soil and environmental variables between June 2018 and February 2019 at North Wyke, UK.ResultsSoils under all treatments were sinks of soil CH4with the willow riparian buffer (–2555 ± 318.7 g CH4ha–1) having the lowest soil CH4flux followed by the grass riparian buffer (–2532 ± 318.7 g CH4ha–1), woodland riparian buffer (–2318.0 ± 246.4 g CH4ha–1), no‐buffer control (–1938.0 ± 374.4 g CH4ha–1), and last, the upslope pasture (–1328.0 ± 89.0 g CH4ha–1), which had a higher flux.ConclusionsThe three vegetated riparian buffers were more substantial soil CH4sinks, suggesting that they may help reduce soil CH4fluxes into the atmosphere in similar agroecosystems.