摘要
本试验采用乙炔抑制法,用气相色谱仪测定 N_O 量,以研究麦田土壤含水量、温度及作物生育期对土壤反硝化作用的影响及其变化规律。从中看出,向田间供水后2～4 d,土壤释放 N_2O 量均达到最大值,N_2O 约1.12～1.33 g·hm^(-2)·h^(-1),小麦生育期以孕穗期到扬花阶段,土壤释放的 N_O 量最高。
The C_2H_2 inhitition method coupled with gas chromatography was used for the measure- ment of N_2O in wheat field to study the influence of soil moisture,temperature as well as the growth stages of wheat on the denitrificaition rates and its dynamics.It showed that the released N_2O reached a maximum.Value,N_2O about 1.12～1.33 g·hm^(-2)·h^(-1)at 2～4 days after irrigation in the ear emergence stage of wheat growth.
