In order to explore effects of nitrogen(N) fertilization on soil respiration in maize(Zea mays) field during the growing season,the study,using EGM-4 sealed soil respiration measurement system,was conducted to measure Soil respiration rate of the maize fieild with different N fertilizatian at Liangzhou,Gansu Province.Results obtained in the study indicated that the soil respiration rate of maize field was changed on a similar diurnal pattern with a single peak,and increased with soil temperature rising up.T...