关键词: 玉米, 季节性干旱, 优势分区, 四川东北部

Abstract: On the basis of the analysis of maize in northeast Sichuan climate resources,the frequency of summer drought,sunshine hours from March to August,average temperature,the difference of diurnal temperature,the sunlight and temperature potential productivity and the productive potential of climate were selected as target factors to analyze the characteristics of seasonal drought and maize climate productivity. Through the statistical analysis,the spatial distribution models of the target factor were built by using GIS techniques. The seasonal drought areas for maize production in the Northeast Sichuan were divided into five climate advantage zones by the excellent method. The results showed that the regional distribution of climate for maize production in Northeast Sichuan had obvious zonal characteristics. The most suitable region was in Dazhou City and in north Bazhong with higher elevations. The least suitable regions were in Guang'an and south Nanchong. The research results provided a scientific basis for the maize production and paddy rice to dryland adjustments.

Key words: Maize, Maize, Seasonal drought, Dominant region, Northeast Sichuan