江苏省小麦赤霉病地域分布的气候分区

CLIMATOLOGICAL ZONATION OF WHEAT SCAB DISTRIBUTION IN JIANGSU PROVINCE

通过江苏省分属不同地区的38个站(点)418年次的气象资料研究分析,得出各地小麦易感赤霉病生育期内的湿段天气年出现频率、年出现时段数和湿段天气出现年份年累计湿段天气持续小时数三项指标的积,与小麦赤霉病的实际区域病情相关密切(r=0.9268>r_(0.01)=0.418);并以此作为病害的气候分区指标,将江苏省小麦赤霉病的地域分布分为四个气候区,即重病区、中等病区、轻病区和极轻病区,每个气候区内又同时分为常发和偶发两个气候亚区。本文还分述了各气候区的气候特征与病害流行的轻重频率,为全省小麦赤霉病的区域性长期预报和综合防治提供了一定的理论依据。

The analysis scientifically by means of 418 year-times meteorological materials, from 38 stations during 1980-1990 in Jiangsu, showed that the limits of winter wheat scab occurrence depend upon following sensitive indexes: appearing frequency, periods and total hours of 'The high-humid period of weather' during sensitive period of wheat scab. Based on that, the areas of wheat scab occurrence in Jiangsu are divided into four climatological zonations, they are: The climatological zonation of winter wheat scab serious occurrence, Zonation of middle level occurrence, Zonation of light level occurrence and Zonation of extremely light level occurrence. Among the four climatological zonations, they are further divided into two climatological subzonations:the climatological area of frequent occurrence and area of occasional occurrence. The results showed the geographic distribution of winter wheat scab in Jiangsu province and it will be scientific foundation of regional long term prediction and integrate management of the disease.