基于GIS的河南省棉花自然生产潜力研究

Analysis of Cotton Natural Potential Productivity in Henan Province Based on GIS

基于作物生产潜力的研究基础，利用GIS建立了河南省棉花生产空间数据库和属性数据库，采用机制法通过对光、温、水、土逐级衰减，计算了河南省各县市棉花的光、温、水、土生产潜力；通过分级统计和制图，分析了河南省棉花生产潜力数值分布和空间分布特征。结果表明：经光、温、水、土逐级衰减后，河南省棉花的自然生产潜力在160～3920kg·hm^-2之间，潜力开发优势为豫北〉豫东〉南阳盆地〉豫西，本文结果对合理开发自然资源，指导农业生产具有重要作用。

The potential cotton natural productivity of Henan was studied with the support of geographic information system （GIS） and agricultural database including spatial databases and attribute databases. Using the mechanism methodology and relative computing models, potential cotton productivity was computed according to the factors such as radiation, temperature, precipitation, and soil in county lovel. The models used in this article were as follows： the solar potential productivity computing model was the model of Huang bing-wei and Yu lu-ning. Hou guang-liang＇s model was used to compute solar and temperature potential productivity and it was revised by climate coefficient. The soil potential productivity was the climate productivity revised by soil coefficient. The characteristics of numeric value disperse and spatial distribution of potential productivity in Henan were analyzed through classification statistics and classification maping. It showed that 38.7% counties＂ solar potential productivity was in 8130～8950 kg · hm^2 , lying in south part of Henan province, the north parrs productivity was high, in 9200～9950 kg ·m^2. The distribution of solar and temperature potential productivity was that 12% counties west part of Henan province were in 4020 ～ 5920 kg· hm^2; 56.8% counties in north part were in 5630～6220 kg · hm^2~ and other counties were in 5290～5630 kg·hm^2. The climate potential productivity was between 650 kg ·m^2 and 5300 kg·hm^2, the distribution was irregula. Soil potential pro＇ductivity was in 160～3920 kg·hm^2, the distribution was similar to climate potential productivity. It was important for exploiting nature resourses and guiding agricultural production.