GIS支持下的粮食单产与光热水分布特征相关分析-以安徽省为例

根据安徽省78县市气象台站20世纪50年代中期到2000年的年平均太阳辐射量、年平均气温和年降水量以及各县市1980、1990、2002年三年平均粮食单产的样点数据，运用地统计学方法，基于GIS技术支持得到全省光温水及粮食单产空间分布的栅格化数据，在此基础上分析了全省的光温水分布及其与粮食单产的组合状况。结果表明：研究区内热量条件对粮食产量的影响最明显，降水量次之，太阳辐射的限制作用最弱；安徽省内光热资源优越地区的粮食单产偏低，应充分利用资源优势提高粮食单产。

Analysis of Relationships Between Grain Yield Per Unit and Distribution Characters of Radiation Temperature and Precipitation Based on GIS: A Case Study of Anhui Province

The relationships between grain yieldper unitand the distribution characters of radiation,Temperature and precipitation werequantitatively analyzed based on GIS,taken Anhui Province as a case study.The yearly grain yield of 78counties from 1950's to 2000 and the monthly mean solar radiation,temperature and precipitation of 78 meteorologystationsin Anhui Province were interpolated by using geo-statistics and associated GIS technology.On the basisof grid data,the relationships between the grain yieldper unitand the distribution characters of the different climate variables werequantitatively analyzed for each region based on the spatial analyst of GIS.The result showed that grain yieldper unit was restrained by temperature,radiation,and precipitationin sequence.In fact,the grain yield was comparatively low in the regions with the ascendant resources of radiation and temperature,and should take the measures better to utilize these resources and increase the grain yield per unit.