Abstract: Based on a long-term field experiment, the effects of no-tillage with wheat stubble mulching (NTS), no-tillage without wheat stubble mulching (NT) and conventional tillage (T) on soil respiration of winter wheat were studied in oasis irrigated area, Northwest China. The results showed that soil respiration rates appeared in single-peak curve during diurnal and seasonal changes under three tillage treatments. The maximum of diurnal soil respiration rate under NTS treatment occurred at 15: 00,but those of NT and T treatments occurred at 14:00. The peak value of seasonal soil respiration rate under three tillage treatments occurred at anthesis stage of winter wheat (early June). The average of soil respiration rates of NTS and T treatments were 43.01% and 33.33% higher than that of NT treatment, respectively. The sensitivity of soil respiration to soil temperature (Q₁₀) was 1.93-3.00 and was NT＞NTS＞T. Soil respiration was not significantly sensitive to soil water content. It was suggested that soil respiration under different tillage was mainly controlled by soil temperature in this area.