GIS支持下的广西龙眼冻害区划研究*

 根据龙眼生长状况、受害程度与低温冻害强度的关系，确定龙眼冻害的等级指标；利用广西90个气象台站30年的气候资料和台站地理信息，建立冻害指标的空间分析模型；根据龙眼冻害分级指标，运用GIS的空间分析能力，分析广西龙眼低温冻害的空间分布特征，得出无冻害、轻度、中度、严重冻害等4个区域的分区结果,为广西龙眼生产趋利避害和优化布局提供科学依据。

Study on Division of Freeze Injury to Logan in Guangxi Based on GIS

According to the relationship among logan growth, the degree of injury and the intensity of freezing damage, the grading indices were analyzed and decided of freezing damage for logan planting. Using the climatic data for 30 years and geographic information of 90 weather stations in Guangxi, spatial analyzing models of the indices of freezing damage were built. According to the grading indices, by the function of spatial analyses of GIS, characteristics of the spatial distribution of logan freezing damage in Guangxi were analyzed，which gave out the divisional result of freezing damage: zero, light, moderate and serious degree. It provides scientific basis for optimizing distribution of Logan planting in Guangxi, and for making use of advantage and avoiding disadvantage.