The data of four weather stations during Apr. to Oct. from 1961 to 2007 in Beijiang cotton planting region were analyzed using the climatic tendency coefficient, and the characteristics of climate change during cotton growth were also analyzed. The results were as follows: the temperature and the precipitation had been increasing, but the duration of sunshine decreasing. The date of the latest frost appearing was getting earlier and the date of the first frost was postponed. The 1O℃ beginning date was getting earlier and the 1O℃ ending date was postponed. The duration and accumulated temperature( ≥ 10℃ )all were increasing. Contrasted with the data of cotton growing date since 1991, each growing stage from seeding to split boll period of cotton became earlier and the growing period was delayed, and the whole growing season of cotton was delayed too. Wanner climate is advantageous to the cotton production in Beijiang cotton planting region.%利用1961～2007年北疆棉区代表站气温、降水、日照时数资料,采用气候趋势系数等方法,分析了北疆柿区棉花生长季的气候变化特征,结果显示,北疆棉区棉花生长季呈现平均气温升高、降水增多、日照时数减少,初霜推迟、终霜提早、无霜期延长,10℃初日提早、终日推迟、持续天数延长、积温增加等特征.对比分析1991年以来的棉花发育期资料,棉花自播种至裂铃的各发育期均表现为提前的趋势,停止生长期略有推后,棉花全生育期天数增加.气候变化对北疆棉区棉花生产的影响以有利为主.
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