摘要
采用乙炔抑制法,利用气相色谱仪测定土壤中 N_2O 释放量,并研究其影响因素。测定结果表明:温度、湿度及通气状况对土壤中 N_2O 释放量的影响具有显著差异,并且交互作用的差异也达到极显著水平。由温度、湿度与土壤中 N_2O 最大释放量的逐步回归方程式看出,在嫌气条件下温度对反硝化作用的影响比湿度的影响较为显著,而好气条件下湿度的影响要比温度的影响显著。
Our experiment indicated that the denitrification in soil were affected by the temperature, soil moisture and aeration status.The amount of N_2O in different treatments were measured in the pres- ence of C_2H_2 by gas chromatography. The results showed that the temperature,soil moisture and aeration had a great influences on the N_2O emission by denitrification.Their mutual effects were also significant. It was illustrated by the stewise regression that effect of temperature on the rate of denitrification in the anaerobic condition was greater than that in the aerobic conditon.The soil moisture in the aerobic con- dition was found to be a more significant effect on denitrification than that in the anaerobic condition.
关键词
土壤
反硝化作用
N2O释放
温度
soil
denitrification
presence of C_2H_2
N_2O emission
