阳信县近10年热量变化对棉花生产的影响分析

利用阳信县气象站1971~2005年气象资料,分别计算阳信县近35年无霜期的长短以及10、15、20℃界限温度的初、终日期、持续日数、积温等热量指标。分析得出：近35年无霜期明显延长;10、15、20℃的界限温度的初日偏早,终日偏晚,持续日数增加;活动积温明显增多。指出近10年是阳信县热量最丰富的时期,并分析了近10年阳信县热量变化对当地棉花生产的可能影响,为科学评估阳信县气候资源、合理安排棉花生产提供参考。

Effects of Heat Changes during Recent Ten Years on Cotton Production in Yangxin County

The annual frostless season and the initial and final dates,duration days,accumulated temperature of 10℃,15℃,20℃ were computed respectively during the recent 35 years by analyzing the meteorological data of 1971~2005 from meteorological station of Yangxin county.The results showed that the frostless season was extended evidently;the initial dates became earlier;the final dates became later;the duration days increased;the active accumulated temperature increased significantly.The recent 10 years were the period of the most abundant heat and the possible effects of heat changes on native cotton production were analyzed to provide scientific reference for the evaluation of climate resources and arrange the cotton production reasonably in Yangxin county.