关键词: 香榧, 区划指标, 评估模型, 综合区划, GIS技术, 浙江省

Abstract:

Torreya grandis 'Merrillii’is an indigenous economic tree species in Zhejiang Province, but its potential economic value is not fully obtained because of the irrational regional distribution. The evaluation system of comprehensive regionalization was constructed according to its biological characteristics and the requirement to environmental factors which mainly included three climate factors, two topography factors and two soil factors. These regionalization indices were gridded by the mixed interpolation method. An evaluation model of comprehensive regionalization was established by using the index accumulation method (IAM). Taking account of the land use condition and eliminating the unsuitable planting regions, the results mainly included three grades of the suitable region, sub-suitable region and unsuitable region. The refined regionalization map was drew by using GIS technology, and the regionalization indices were calculated according to the grids of 100 m×100 m. The results of this study would provide a scientific basis for the production of Torreya grandis 'Merrillii’in Zhejiang Province.

Key words: Torreya grandis 'Merrillii&rsquo, regionalization indices, evaluation model, comprehensive regionalization, GIS technology, Zhejiang Province