Nitrous oxide emission from soils after incorporating crop residues
Nitrous oxide emission from soils after incorporating crop residues
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DOI：
10.1111/j.1475-2743.2000.tb00179.x
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发表时间：
2000-06-01
影响因子：
3.8
通讯作者：
Vinten, AJA
中科院分区：
文献类型：
--
作者：
Baggs, EM;Rees, RM;Vinten, AJA
测量了苏格兰东南部不同农业系统的N2O排放。在耕地施肥、裸地耕作、草地翻耕以及耕地和园艺作物残余物掺入后，N2O排放量暂时增加，但效果是短暂的。大部分排放发生在头两周，30-40天后恢复到“背景”水平。在轮作后的前14天内，富氮生菜残留物的通量最高，排放了1100 g N2O-N ha（-1）。降雨、土壤矿质氮、栽培技术和残茬氮素比对排放的大小和模式有强烈影响。在掺入低CN比的材料后，测量到的排放量相对较大。建议的管理措施将提高氮的利用效率并减少农业土壤中N2O的排放。
Emissions of N2O were measured from different agricultural systems in SE Scotland. N2O emissions increased temporarily after fertilization of arable crops, cultivation of bare soil, ploughing up of grassland and incorporation of arable and horticultural crop residues, but the effect was short-lived. Most of the emission occurred during the first two weeks, returning to 'background' levels after 30-40 days. The highest flux was from N-rich lettuce residues, 1100 g N2O-N ha(-1) being emitted over the first 14 days after incorporation by rotary tillage. The magnitude and pattern of emissions was strongly influenced by rainfall, soil mineral N, cultivation technique and CN ratio of the residue. Comparatively large emissions were measured after incorporation of material with low CN ratios. Management practices are recommended that would increase N-use efficiency and reduce N2O emissions from agricultural soils.