关键词: 油菜, 油菜, 主要性状, 相关性分析, 主成分分析

Abstract: To make full use of the climate resources under climate warming, through analysis of current early rice sowing dates in counties of Wenzhou, it was found that there were great differences in the arrangements of early rice sowing date responding to climate warming, and the sowing dates slightly changed in most area, but varied in large range in some places. On the whole, the potential of climate resources was not fully explored. Based on historical daily mean air temperature data at meteorological stations in counties of Wenzhou, we calculated the beginning date of 11℃ of each station every year, and systematically analyzed warmer period changes by using SPSS software to do the homogenous variance analysis and T test of the significance between mean values in two periods. The results showed that: the beginning date of 11℃ had changed significantly since 2000 in all counties except Taishun; the 80% guaranteed rate of the beginning date and the average value after 2000 was 10-day earlier than those before 2000. In considering current sowing situation in each county of Wenzhou, we proposed that local agricultural management departments and farmers should make arrangements for early rice sowing date according to the plan of crops and the sowing date forecast, which should be released by the local meteorological bureau in the middle of March every year, thus to increase farmers’income in dealing with climate change.