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首页> 外文期刊>Soil Biology & Biochemistry >The influence of winter soil cover on spring nitrous oxide emissions from an agricultural soil
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The influence of winter soil cover on spring nitrous oxide emissions from an agricultural soil

机译：冬季土壤覆盖对农业土壤春季一氧化二氮排放的影响

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摘要

In temperate regions, a majority of N2O is emitted during spring soil thawing. We examined the influence of two winter field covers, snow and winter rye, on soil temperature and subsequent spring N2O emissions from a New York corn field over two years. The first season (2006-07) was a cold winter (2309 h below 0 degrees C at 8 cm soil depth), historically typical for the region. The snow removal treatment resulted in colder soils and higher N2O fluxes (73.3 vs. 57.9 ng N2O-N cm(-2) h(-1)). The rye cover had no effect on N2O emissions. The second season (2007-08) was a much milder winter (1271 h below freezing at 8 cm soil depth), with lower N2O fluxes overall. The winter rye cover resulted in lower N2O fluxes (5.9 vs. 33.7 ng N2O-N cm(-2) h(-1)), but snow removal had no effect. Climate scenarios predict warmer temperature and less snow cover in the region. Under these conditions, spring N2O emissions can be expected to decrease and could be further reduced by winter rye crops
机译：在温带地区，春季土壤融化过程中会排放大量N2O。我们研究了两个冬季田间覆盖物（雪和冬季黑麦）对纽约玉米田两年来土壤温度和春季N2O排放的影响。第一个季节（2006-07年）是一个寒冷的冬天（在0摄氏度以下，土壤深度8厘米处2309小时），该地区历来是典型的。除雪处理导致土壤变冷和N2O通量更高（N3.3-N cm（-2）h（-1）分别为73.3和57.9 ng N2O-N cm（-2）h（-1））。黑麦覆盖物对N2O排放没有影响。第二个季节（2007-08年）的冬天要温和得多（在土壤深度8 cm处比冰冻温度低1271小时），而N2O通量总体较低。冬季黑麦覆盖导致较低的N2O通量（5.9 vs. 33.7 ng N2O-N cm（-2）h（-1）），但除雪没有影响。气候情景预测该地区温度会升高，积雪较少。在这种情况下，预计春季的N2O排放量将会减少，冬季黑麦作物可能会进一步减少

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