贵州植被生产力时空变化分析:以威宁县为例  

Temporal-spatial Variation of Vegetation Productivity in Guizhou:a Case Study in Weining County

作　　者：王志红 任金铜[1] 戴华阳 杨可明[2] WANG Zhihong;REN Jintong;DAI Huayang;YANG Keming(Guizhou University of Engineering Science,Bijie 551700,China;China University of Mining and Technology,Beijing 100083,China)

机构地区：[1]贵州工程应用技术学院,贵州毕节551700 [2]中国矿业大学(北京),北京100083

出　　处：《环境科学与技术》2018年第9期200-205,共6页Environmental Science & Technology

基　　金：国家自然科学基金项目(31560059);贵州省科技厅自然科学研究项目(黔科合LH字[2016]7052号);贵州省教育厅自然科学研究项目(黔教合KY字(2015)448号);贵州省教育厅创新群体重大研究项目(黔教合KY字﹝2017﹞050);贵州省本科教学工程建设项目(2015GZJG02)

摘　　要：为了研究贵州高原植被生产力分布特点及其与地形变化的关系,该文使用MODIS下的MOD17A3H、MCD12Q1数据,辅助以DEM数据和GF1数据,利用移动平均趋势分析、线性回归分析、栅格统计分析等方法对威宁县2007-2015年间的植被生产力时空变化及其与海拔、地形起伏度的关系进行分析。结果表明:(1)2007-2015年之间,威宁县9年植被净第一性生产力(NPP)均值为607.04g/(m^2·a)(以C计),年增长率8.69 g/(m^2·a)(以C计)。(2)NPP均值林区大于草原,草原大于农业区;农业区域生产力总体上呈现增加趋势,林区NPP变化不大;(3)NPP分布与海拔无相关性或相关性不明确;地形起伏度与NPP相关性显著(sig=0.015),呈正相关,提示地形起伏大的区域NPP值越高。In order to study the distribution characteristics of vegetation productivity and correlations between NPP and topography, MODIS MOD17 A3 H and MCD12 Q1, as well as DEM and GF1 were used as basic data. Then based on methods of moving average trend analysis, linear regression analysis and raster statistical analysis, the temporal-spatial variation of vegetation productivity and its relationship between elevation and relief in Weining County, Guizhou Province from 2007 to 2015 were analyzed. The results showed from 2007 to 2015, the nine-year average NPP of Weining County was 607.04 g C/（m2·a）,with an annual growth rate of 8.69 g C/（m2·a）. The average NPP in forest area was larger than that in grassland, and NPP in agricultural area was the least. The productivity in agricultural area showed an increasing trend as a whole, while the NPP in forest area changed little. The NPP distribution was not related to elevation or the correlation was not clear. The relief of topography was significantly correlated with NPP（sig = 0.015）, indicating a positive correlation, and the larger the relief of topography was, the higher the NPP value would be.

关 键 词：MOD17A3H NPP 地形因子 威宁县 

分 类 号：X173[环境科学与工程—环境科学]