Nitrous oxide emissions from fertilized soils: summary of available data.

摘要: Direct measurements of fertilizer-derived N₂O emission data from 104 field experiments reported in agriculture and soil science literature that were obtained between 1979 1987 summarized used to estimate worldwide emissions. Although without statistical determination, there appears be a trend emissions type quantity fertilizer applied; the available does not indicate particular or system. Using fraction N evolved as consumption estimates for five types, 0.1 1.0 Tg N₂O-N (avg. 0.3; median 0.2) estimated released during “sampling period.” If these are doubled account after sampling period lost drainage water ground-water, expected range would 0.2 2.1 0.7; 0.5) emitted into atmosphere 1984. The magnitude this is agreement with recent global estimates. 100 consumed year 2000, release will probably exceed 3 2000. It 23 315 Gg fields cultivated leguminous crops 1986. Future research needs suggested. This paper necessarily reflect official position USEPA.