Synergistic effects of dissolved organic carbon and inorganic nitrogen on methane uptake in forest soils without and with freezing treatment.
Synergistic effects of dissolved organic carbon and inorganic nitrogen on methane uptake in forest soils without and with freezing treatment.
复制标题
未经和经过冷冻处理的森林土壤溶解有机碳和无机氮对甲烷吸收的协同效应
DOI：
10.1038/srep32555
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发表时间：
2016-08-30
影响因子：
4.6
通讯作者：
Cheng W
中科院分区：
文献类型：
--
作者：
Wu H;Xu X;Duan C;Li T;Cheng W
关于冻结后释放到土壤中的溶解有机碳(DOC)和无机氮(N)的相互作用如何影响森林土壤对甲烷(CH4)的吸收，人们知之甚少。在这里，我们通过土壤-岩心培养实验，展示了冷冻处理和葡萄糖作为DOC源如何影响NH4+-N和NO3-−-N在抑制土壤CH4吸收中的作用。长期低温冻结降低了两个不加碳(C)和氮的温带林地土壤对CH4的累积吸收。NH_4Cl、KNO_3等N肥对土壤CH4吸收的抑制作用远大于C肥。冷冻处理消除了NH4Cl和KNO3添加对CH4吸收的抑制作用，这种抑制作用受葡萄糖添加和森林类型的影响。添加葡萄糖消除了NO3-−-N对森林土壤CH4吸收的抑制作用，而添加葡萄糖和NH4+-N则协同抑制土壤对CH4的吸收。结果表明，在土壤湿润和解冻期间，DOC和N的输入对林下土壤CH4吸收的协同作用是重要的。
There is limited knowledge about how the interaction of dissolved organic carbon (DOC) and inorganic nitrogen (N) released into the soil just after freezing can affect methane (CH4) uptake in forest soils. Here, we present how freezing treatment and glucose, as a DOC source, can affect the roles of NH4+-N and NO3−-N in inhibiting soil CH4uptake, by using soil-core incubation experiments. A long-term freezing at low temperature reduced cumulative CH4uptake in the soils sampled from two temperate forest stands without carbon (C) and N addition. The inhibition effects of N addition as NH4Cl and KNO3on the soil CH4uptake were much larger than C addition. Freezing treatment eliminated the inhibition effect of NH4Cl and KNO3addition on CH4uptake, and this response was affected by glucose addition and forest types. The addition of glucose eliminated the inhibition effect of NO3−-N on CH4uptake in the forest soils without and with freezing treatment, while the addition of NH4+-N and glucose inhibited synergistically the soil CH4uptake. The results highlight the importance of synergistic effects of DOC and N inputs on the soil CH4uptake under forest stands during soil wetting and thawing periods.
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影响因子：
9.7
作者：
Borken, W;Davidson, EA;Steudler, P
通讯作者：
Steudler, P
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