冬小麦田氧化亚氮的排放

Emissions of N2O from Winter-wheat Fields.

对１９９０－１９９２年间冬小麦田氧化亚氮排放的日变化和季节变化进行了研宪，观测了Ｎ＿２Ｏ通量与土壤温度的关系。在整个实验阶段，不施肥田和施肥田Ｎ＿２Ｏ通量的平均值为１０．５μｇＮ／ｍ￣２·ｈ和２２．６μＮ／ｍ．ｈ。小麦地上所施尿素排放Ｎ＿２Ｏ－Ｎ的释放系数为０．０９％。

AbstractDiurnal and seasonal variations of N2O emission from winter-wheat fieldswere studied in Northern China from 1990 to 1992.The relationship of N2Oflux and soil temperature was observed.The average of N2O fluxes fromunfertilized and fertilized plots were 10.5μg/m2h and 22.6μg N/m2h, res-pectively,The emission coefficient of urea released as N2O-N from winter-wheat field was 0.09%。