GIS支持下陕西省植被生产有机物价值研究  

THE RESEARCH ON VALUATION OF FOREST ECOSYSTEM PRODUCING ORGANIC MATTER IN SHAANXI

作　　者：李晶[1] 任志远[1] 孙根年[1] 

机构地区：[1]陕西师范大学旅游与环境学院,西安710062

出　　处：《植物生态学报》2002年第6期684-688,共5页Chinese Journal of Plant Ecology

基　　金：教育部重大课题 (2 0 0 1DXM70 0 12 );陕西自然科学基金 (2 0 0 0D0 2 );陕西师范大学重点科研基金资助项目 (995 0 14 )

摘　　要：在地理信息系统的支持下 ,利用改进的周广胜NPP模型 ,根据陕西省植被图和陕西省相关的气候资料 ,充分考虑植被类型和覆盖度 ,以植被类型为单位估算了陕西省陆地生态系统NPP物质量进行了测定 ,结果为 :陕西省陆地植被总产量为 195 .3395t·hm-2 ·a-1,单位面积平均产量为 7.2 5TDM·hm-2 ·a-1。得到陕西省植被NPP值列表。以第一性生产物质量为基础 ,采用能量比市场价格法测定了陕西省各种植被类型的生产力价值 ,结果是 :陕西省的 2 7个植被类型总净第一性生产力价值为 35 8.5 0亿元。单位面积的生产力价值因受到水热的限制 ,单位生产力价值明显是南部大于北部 ,植被NPP价值总体上也呈现从南向北的递减趋势。温带落叶阔叶林的生产价值最多 ,约为 83.2 1亿元 ;温带沼泽最少 ,约为 36 3万元。The biosphere and land vegetations are the material foundation on which human being live, and which provide us valued resources, such as food, medicinal materials, and original materials. Therefore, the net primary productivity (NPP) is the main character of the ecosystem. Based on extensive and deep research, we can better understand the ecosystem process and ecosystem function. The research of the former was more from the angle of nature ecology and concerned productions of the NPP that measured, less from other merchandise in the market economy frame. This paper is based on the comprehensive survey of forestry ecosystems in Shaanxi Province. The mass of land vegetation in Shaanxi Province was studied with Geographic Information System (GIS) technology, ecological principles and ecological economy principles, utilizing improved NPP modeling, which based on the differences of vegetation types and overlay rates. The results show that land vegetation produces 150.9×106 t biomass in 2.1×108 hm2 area of Shaanxi Province. The district variety of land vegetation in Shaanxi Province is evident, and the difference of productivity for different vegetion types is big. In Shaanxi Province the highest NPP is 12.610 7 t·hm -2·a -1, which lies in Qinba mountain and the type of vegetation is subtropical bamboo grove; For the area along the Great Wall and the wind sand in North of Shaanxi Province, NPP is very low, less than 5 t·hm -2·a -1; With the influence of the industrialization, NPP in Guanzhong basin is low too, less than 7 t·hm -2·a -1. In Shaanxi Province, with the vegetation type and climatic zone, the NPP of unit area has the regular variation, the NPP material mass of subtropical bamboo forest is 12.61 t·hm -2·a -1, coniferous forest 8.1-12.61 t·hm -2·a -1, shrublands 5.6-10.61 t·hm -2·a -1, grasslands 2.4-6.2 t·hm -2·a -1, fruiter 4.4-9.9 t·hm -2·a -1. The distribution pattern of NPP is as follows: the natural forest ≥ artificial fruit trees ≥ grasslands ≥shrublands

关 键 词：GIS 陕西 植被 有机物 价值 净第一性生产力 模型 

分 类 号：S718.556[农业科学—林学]