基于地形因子的南方农牧交错带内植被净初级生产力的分布特征  

Distribution Characteristics of the Vegetation Net Primary Production in the Farming-pastoral Eco-tone of South China Considering Topographic Factors

作　　者：赵唯茜 杜华明[1] 董廷旭[1] 胡利利[1] ZHAO Weixi;DU Huaming＊;DONG Tingxu;HU Lili(College of Resource and Environment Engineering,Mianyang Teachers＇College,Mianyang,Sichuan 621006)

机构地区：[1]绵阳师范学院资源环境工程学院,四川绵阳621006

出　　处：《绵阳师范学院学报》2018年第11期93-99,共7页Journal of Mianyang Teachers＇ College

基　　金：生态安全与保护四川省重点实验室开放基金项目(ESP1707);绵阳师范学院科研启动项目"西南地区自然灾害风险识别;评价及管控研究"(QD2016A001);绵阳师范学院研究生创新实践基金资助项目(XY-CXXM201814)

摘　　要：为了解南方农牧交错带内,不同地形因子影响下植被净初级生产力(NPP)的分布情况.采用DEM数据和MOD17A3H遥感数据,利用Arc GIS空间分析工具,对南方农牧交错带内不同海拔、坡度、坡向下的植被生产力分布情况进行了分析.结果表明:(1)从研究区域整体来看植被NPP随海拔的增加而减小;(2)研究区域内南坡NPP最大,东坡NPP最小;(3)在大于35°的坡面,所分布的植被NPP值最大;(4)从海拔分级来看,在小于3 400 m的海拔范围内,NPP较高的坡面多分布于北坡和东北坡;而在大于4 000 m的海拔范围内NPP较高的坡面则多分布于西南坡.(5)在小于4 600m的海拔范围内10°~35°的坡面植被NPP值较大,海拔高于4 600 m时,0°~3°的坡面植被NPP值最大.In order to understand the distribution of the vegetation NPP under the influence of topographic factors in the farming-grazing transitional zone of south China. Using MOD17AH dataset, DEM and ArcGIS spatial analysis tools are used to analyze the distribution of the vegetation NPP under different topographic factors. Detailed research results indicated that：（1）The vegetation net primary production decreases with the increase of altitude.（2）The vegetation NPP value of the south slope is higher and the NPP value of the north slope is the smallest in the study area.（3）The vegetation NPP value above slope of great than 35°is higher（4）The NPP value of the north and northeast aspect is higher when the elevation is less than 3400 m.（5）The vegetation NPP value is higher between 10°and 35°slop.When the elevation is less than 4600 m. The vegetation NPP value is higher between 0°and 3°slop.When the elevation is great than 4600 m.

关 键 词：NPP 南方农牧交错带 MOD17A3H DEM 

分 类 号：Q948[生物学—植物学]