Temporal Change and Trend Analysis of the Four Seasons in Jingzhou During the Past 60 Years and the Countermeasures in the Crop Growth

According to the daily temperature data, the seasonal duration and beginning date for 1955- 2017 at jingzhou station, the seasonal time change trend was studied by using the Mann-kendall test and other methods. The results show that the growth season in Jingzhou and summer prolonged significantly (P< 0.01), while autumn and winter shortened significantly (P< 0.01). The spring had no obvious change. The extension rate (0.3725) in summer was the largest one, the shortening rate (-0.247) in winter was greater than that in autumn (-0.1559). The seasonal beginning date delayed significantly in winter and autumn (P< 0.01), while spring and summer were ahead of time significantly (P< 0.01).