基于GIS的诸暨香榧用地适宜性评价

GIS-Based Evaluation of Land Use Suitability for Torreya grandis in Zhuji

摘要: 香榧是我国特有的一种具有丰富营养价值和较高经济价值的树种，诸暨市是我国香榧的重点产区之一。本文以诸暨市DEM数据、土壤类型数据等空间数据为基础，通过使用地理信息技术，建立起海拔高度、土壤类型、坡度条件等多因子的香榧用地适宜性评价体系。对诸暨市进行香榧用地适宜性评价，最终将诸暨市香榧用地适宜性分为最适宜、次适宜、临界适宜和不适宜这四个等级地块。结果显示，诸暨市周边的山地丘陵为香榧的生长和结实提供了良好的环境，而占诸暨面积大部分的平原不适宜香榧的生长。诸暨香榧用地适宜性评价可对香榧种植区域的选择提供一定的指导。

Abstract: Torreya grandis is a unique economic tree species in China, which has rich nutritional value and economic value. Zhuji County is one of the key production areas in China. By using geographic information technology and based on spatial data such as DEM data and soil type data of Zhuji County, this paper will establish a multi-factor land use suitability evaluation system of Torreya grandis, including altitude, soil type and slope conditions. Finally, the land use suitability of Torreya grandis in Zhuji County is divided into four grades: most suitable, sub-suitable, critical suitable and unsuitable. The results show that the mountainous and hilly areas surrounding Zhuji County provide a good environment for the growth and fruiting of Torreya grandis, while the plains that account for most of the Zhuji area are not suitable for the growth of Torreya grandis. The land use suitability evaluation of Zhuji Torreya grandis can provide certain guidances for the selection of Torreya grandis planting areas.