摘要
在分析川东北地区玉米气候资源、季节性干旱特征、气候生产潜力的基础上,选择伏旱频率、3-8月日照时数、平均温度、温度日较差、光温生产潜力、气候生产潜力等因素作为指标因子,通过统计分析,建立各指标因子的空间分布模型;采用GIS分析技术,利用集优法将川东北季节性干旱区划分为5类玉米气候优势区。结果表明,川东北地区玉米气候综合优势的区域分布具有明显的带状特征,最优区在达州市、巴中市北部海拔较高的区域,相对较差的区域在广安、南充的南部地区。玉米气候优势分区结果可为川东北地区玉米生产布局调整和部分稻田水改旱提供科学依据。
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 Guanghn and south Nanchong. The research results provided a scientific basis for the maize production and paddy rice to dryland adjustments.
出处
《中国农业气象》
CSCD
2009年第3期401-406,共6页
Chinese Journal of Agrometeorology
基金
国家"十一五"科技支撑计划重大课题(2006BAD04807-3)
四川省科技厅项目应用技术研究与开发计划(2008NG0009)
科技部农转资金项目(04EFN217400409)
关键词
玉米
季节性干旱
优势分区
四川东北部
Maize
Seasonal drought
Dominant region
Northeast Sichuan
