Methane and nitrous oxide fluxes from a farmed Swedish Histosol
Methane and nitrous oxide fluxes from a farmed Swedish Histosol
复制标题
来自瑞典养殖 Histosol 的甲烷和一氧化二氮通量
DOI：
10.1111/j.1365-2389.2009.01124.x
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发表时间：
2009
影响因子：
4.2
通讯作者：
L. Klemedtsson
中科院分区：
文献类型：
--
作者：
Å. Kasimir Klemedtsson;P. Weslien;L. Klemedtsson
使用静态室测量了支持瑞典草地和大麦生产的组织土壤（约占瑞典农业土壤的10%）中温室气体甲烷（CH4）和氧化亚氮（N2O）的通量，为期3年。排放量随区域和时间的变化而变化。甲烷在土壤中既产生又氧化：通量很小，草地的平均排放量为0.12 g CH4 m−2年−1，大麦地的净吸收量为- 0.01 g CH4 m−2年−1。甲烷排放量与土壤水分有关，湿润时甲烷排放量更多。一氧化二氮的排放量各不相同，在土壤耕作、耕作和耙地后排放达到峰值。平均而言，草地和大麦地的N2O排放量分别为0.20和1.51 g m−2年−1。N2O与土壤因子之间没有相关性，但最大的N2O排放与最干旱地区相关，平均孔隙充水空间< 60%。我们建议减少排放的最佳管理方案是通过永久种草来保持土壤适度湿润，这可以限制N2O的排放，同时减少CH4的排放。
Fluxes of the greenhouse gases methane (CH4) and nitrous oxide (N2O) from histosolic soils (which account for approximately 10% of Swedish agricultural soils) supporting grassley and barley production in Sweden were measured over 3 years using static chambers. Emissions varied both over area and time. Methane was both produced and oxidized in the soil: fluxes were small, with an average emission of 0.12 g CH4 m−2 year−1 at the grassley site and net uptake of −0.01 g CH4 m−2 year−1 at the barley field. Methane emission was related to soil water, with more emission when wet. Nitrous oxide emissions varied, with peaks of emission after soil cultivation, ploughing and harrowing. On average, the grassley and barley field had emissions of 0.20 and 1.51 g N2O m−2 year−1, respectively. We found no correlation between N2O and soil factors, but the greatest N2O emission was associated with the driest areas, with < 60% average water‐filled pore space. We suggest that the best management option to mitigate emissions is to keep the soil moderately wet with permanent grass production, which restricts N2O emissions whilst minimizing those of CH4.