基于GIS技术的陕西省设施农业越冬期低温冻害精细化风险区划——以泾阳县为例

为了掌握陕西省设施农业种植各县内越冬期低温冻害风险分布情况,以泾阳县为例,选择泾阳县9个区域气象站及周边县级气象站越冬期Tmin≤-8℃的日数(D)作为区划指标,应用GIS技术建立数据空间分布模型,并通过分级,将泾阳县设施农业越冬期低温冻害分为基本无风险区、风险Ⅰ区、风险Ⅱ区、风险Ⅲ区4个区,进行风险区划并制作区划图。结果表明,泾阳县设施农业越冬期低温冻害风险从泾河两岸向南北逐渐增大,泾阳县农业局可根据此区划结果,合理规划设施农业发展区域,并科学设计各区内设施大棚建造结构,以将越冬期低温冻害对设施农业生产和发展的影响降至最低。

Refined Risk Assessment of Wintering Freezing Disaster for Facilities Agriculture in Shaanxi Based on GIS: A Case of Jingyang County

In order to find the regional distribution of the risk of wintering freezing disaster for facilities agriculture in Shaanxi,taking Jingyang for an example,the days of T min ≤-8℃ in Jingyang regional weather stations and the surrounding towns weather stations were used as the assessment index.The author simulated the small-grid data of assessment index by using GIS technology and divided the grade of the risk into almost no risk,risk region Ⅰ,risk region Ⅱ and risk region Ⅲ.The results showed that the grade of the risk increased form the Jing river to the north and south,it could be adopted by Jingyang County farm bureau to plan the planting region and design the structure of the greenhouse scientifically,which would be reduced the damage of the wintering freezing disaster to the development of agricultural facilities.