Abstract:

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 Tmin≤-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 regionⅠ, risk regionⅡ and risk regionⅢ. 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.