热量条件变化对积温及作物生长季的研究

通过研究热量条件的变化，分析原阳1981—2012年热量奈件（月、四季及≥0℃、≥10℃的活动积温及持续日数）的变化特征，建立多年平均气温与积温和持续日数的线性相关关系。结果表明，原阳县作物生长季内平均气温较20世纪80年代上升0．5℃。≥0℃的初日、终日分别提前11d和推后8d，作物生长期延长19d；≥0℃的积温增加153．9℃·d；≥10℃的初日、终日以及持续日数与80年代相比无明显变化。年平均气温与≥0℃、≥10℃积温有显著的线性相关关系。

Study on Heat Conditions Change on Accumulated Temperature and Crop Growing Season

Through study on the change of heat conditions, the variation characteristics of heat condition （monthly, seasonal and ≥0 ℃, ≥ 10 ℃ accumulated temperature and duration） in Yuanyang during 1981 -2012 were analyzed. The linear correlation among several years mean tem- perature and accumulated temperature and duration was established. The results showed that mean temperature in crops growing season in Yuan- yang County rises O. 5 ℃ compared with 1980s＇. The first day and final day≥0 ℃ advanced and delayed 11 d and 8 d, respectively, crops growing period prolonged 19 d; ≥0 ℃ accumulated temperature increased 153.9 ℃. d; the first day, final day and duration of ≥10 ℃ has no obvious change compared with 1980s＇. The annual mean temperature has significant correlation with ≥0 ℃, ≥ 10 ℃ accumulated temperature.