基于GIS的甘肃省农业生产潜力研究

A Study on Potential Land Productivity Based on GIS Technology in GANSU Province

在气象数据库、属性数据库和GIS支持下,采用机制法对作物生产潜力模型进行了光、温、水、土逐级订正,得到了甘肃省的光合、光温、降水、水资源及土地的生产潜力,其结果很好的反映了甘肃省农业生产和农业资源分布的空间格局,各级订正的有效系数进一步揭示了各种资源因子对农业生产的限制程度。

Based on previous researches on potential agricultural productivity and supported by geographical information system (GIS) technology and agricultural databases which include spatial databases and attribute databases, potential land productivity in Gansu province was studied By using the mechanism methodology, the model of potential agriculture productivity was established Effective coefficients for factors such as radiation, temperature, water and land were decided; then potential photosynthesis productivity, potential temperature productivity, potential precipitation productivity, potential agricultural water resources productivity and potential land productivity in Gansu province were calculated The results show the spatial distribution inconsistency between agricultural production and agricultural resources in Gansu province, and this reveals the different limitation of radiation, temperature, water and land effective coefficient to agricultural production Finally, we contrasted the yield of per unit area and potential land productivity in county level