基于GIS的黄龙核桃生态气候适宜性评价研究

Huanglong Walnut Suitability Evaluation Based on GIS

以陕西省黄龙县各个乡镇的核桃园为研究对象,使用陕西省黄龙县气象局的7个观测站2007—2014年的气象资料,DEM以土壤数据为基础,以格网化的30 m×30 m栅格为统计单元,利用GIS逆距离权重法的综合插值、模糊综合评价等方法和相关数学模型,对陕西省黄龙县核桃的生态气候适宜性进行评价。结果表明:基于8个评价因子构成的黄龙县核桃适宜性评价指标体系和各评价指标,采用模糊综合评价法将黄龙县核桃生长的生态气候适宜性划分获得的最适宜区、一般适宜区和不适宜区3个等级,基本符合当地的实际情况;利用ArcGIS制作完成的黄龙县核桃种植宜适区专题图,对该县的核桃产业发展具有一定的指导作用;通过对研究区核桃适宜性进行综合评价,发现三岔乡西南部及中部,界头庙镇的西南部,以及范家卓子社区的南部核桃适宜性最好,其他区域适宜性不如以上3个区域,还有少数区域不适宜种植核桃。

Huanglong of Shaanxi Province was taken as the research object.Based on the meteorological data and DEM of the seven observatories of the county meteorological bureau from 2007 to 2014,the grid transformation of 30 m×30 m grid was used as the statistical unit.Using the comprehensive interpolation of GIS inverse distance weight method and fuzzy comprehensive evaluation methods and related mathematical models to evaluate the ecological climate suitability of walnut in Huanglong,Shaanxi Province.The results showed that the evaluation index system and evaluation index of walnut suitableness in Huanglong based on 8 evaluation factors,the fuzzy comprehensive evaluation method was used to divide the eco-climatic suitability of Huanglong′s walnuts into the most suitable areas,general suitable areas and unsuitable areas,which were basically accord with the local actual situation.The thematic map of walnut planning suitable areas in Huanglon,which was completed by ArcGIS,had a certain guiding role in the development of walnut industry in Huanglong.Through comprehensive evaluation of walnut suitability in the study area,it was found that the southwestern part of the town and the middle part of Sancha township,the southwestern part of Jietoumiao town,and the southern part of the Fanjiazhuozi community had the best suitability.Other areas were not as suitable as these areas,and a few areas were not suitable for planting walnuts.