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本文估算了英国耕作土壤中的反硝化损失量。在牛津郡的出间试验中,10月～6月间土壤中的反硝化损失量估计为5kgN/ha以下。秋季N_2O挥发最快,10月～3月间逸至大气中的N_2O约为0.5kgN/ha;春季施肥后,损失量为0.2kgN/ha。此外用土壤——大气分析法及铂金电极法测定了土壤中硝化作用过程中的土壤容积量,结果表明,反硝化作用只发生在土壤表层薄的缺氧带中。
This article estimates the amount of denitrification loss in cultivated soils in the United Kingdom. In the Oxfordshire inter-lab test, the amount of denitrification loss in soils from October to June is estimated to be below 5 kgN / ha. N_2O volatilized most rapidly in autumn, and the N_2O released into the atmosphere from October to March was about 0.5kgN / ha. After spring fertilization, the amount of loss was 0.2kgN / ha. In addition, soil-atmosphere analysis method and platinum electrode method were used to determine the volume of soil during the nitrification process. The results showed that denitrification occurred only in the thin anoxic zone of soil surface.