基于GIS技术的区域林地生产力估测与分区  

Calculation and Division of Regional Forestry Land Productivity Based on GIS

作　　者：邢世和[1] 韦红[1] 

机构地区：[1]福建农林大学资源与环境学院,福建福州350002

出　　处：《山地学报》2006年第4期473-479,共7页Mountain Research

基　　金：福建省自然科学基金项目(B0010018)~~

摘　　要：借助GIS和数学模型集成技术，利用福建省气象观测资料推算出全省年均温度、降水量和实际蒸散量的125m×125m栅格数据，采用植被净第一性生产力改进模型结合林地土壤质量系数，修正计算区域林地生产力栅格数据，然后借助动态聚类分析模型进行区域林地生产力分区。结果表明福建省林地生产力介于262．2g／（m^2·a）-2100．6g／（m^2·a），9个设区市林地生产力均值大小顺序为：漳州〉龙岩〉福州〉厦门〉三明〉莆田〉南平〉泉州〉宁德。全省林地以高、中生产力区占绝对优势，分别占全省林地总面积的76．26％和23．54％，其中高生产力区主要分布于闽北、闽西和闽中地区，而中生产力区则主要分布于闽北、闽中和闽东地区。Based on GIS integrated with mathematic models, 125 m × 125 m grid data of annual averages of temperature, rainfall and actual evaporation capacity in Fujian were calculated by weather observing materials, the grid data of regional forestry land productivity were then calculated by modified net primary productivity model revised with soil quality coefficient, and the productivity divisions were evaluated by dynamic cluster analysis model. The results showed that the productivity of forestry land in Fujian ranged from 262.2 g/（ m^2 ·a） to 2 100.6 g/（ m^2 · a）. The productivity in nine Prefectures of Fujian showed following tendeney：Zhangzhou 〉 Longyan 〉 Fuzhou 〉 Xiamen 〉 Shanming 〉 Putian 〉 Nanping 〉 Quanzhou 〉 Ningde. The areas of high,medium productivity of forestry land in Fujian were superior,which were 76.26% and 23.54% of the total,respectively. The areas of high productivity distributed in North, West and Middle Fujian and those of medium productivity distributed in North, Middle and East Fujian.

关 键 词：GIS 数学模型 林地 生产力 分区 

分 类 号：S716.3[农业科学—林学]