近10年榆林市植被净初级生产力时空分异特征  

Temporal and Spatial Change Feature of Net Primary Productivity in Yulin City from 2000 to 2010

作　　者：周淑琴[1,2] 李娜[1] 荆耀栋[1] 张青峰[2] 田晓红[1] 

机构地区：[1]山西农业大学资源环境学院,山西太谷030801 [2]西北农林科技大学资源环境学院,陕西杨凌032300

出　　处：《遥感信息》2015年第6期116-120,共5页Remote Sensing Information

基　　金：陕西省自然科学基金项目(2011JM5007)

摘　　要：针对榆林市生态环境脆弱,植被净初级生产力分布及变化对其影响较大的问题,利用2000年、2005年和2010年的NPP数据,采用马尔科夫转移矩阵及GIS空间分析功能,揭示榆林市NPP的时空变化特征。结果表明：（1）榆林市NPP空间分布由西北向东南逐渐递增。（2）2000年~2010年NPP呈显著上升趋势：2000年~2005年NPP升高区域95.03%,增幅大于300gC/（m2·a）的占47.22%,主要分布在榆林市最北端和南部地区;2005年~2010年NPP升高区域面积93.96%,增幅大于300gC/（m2·a）的占54.10%,集中在东南大部分地区。（3）榆林市NPP增加的主要因素是1999年以来该区采取的多项植被恢复与重建工程等措施,植被覆盖度增加。The ecological environment is fragile in Yulin city.The distribution and change of the net primary productivity of vegetation has great influence on it.We analyzed spatial and temporal variation characteristics of NPP in Yulin city by markov transfer matrix and spatial overlay analysis based on the 2000,2005 and 2010 NPP data.The results show that：（1 ）The distribution of NPP in Yulin city gradually increases from the northwest to the southeast.（2 ）The annual NPP shows a significant upward trend from 2000 to 2010 in Yulin city.The NPP increased area is about 95%,which was 300gC/（m2 ＆#183;a） larger and accounting for 47.22%,mainly distributed in the north and south area from 2000 to 2005.Meanwhile,the NPP increased area is about 94%,which was 300gC/（m2 ＆#183;a）larger and accounting for 54.10%,mainly distributed in the southeast from 2005 to 2010.（3 ）The main factors of Yulin NPP increase is the ecological immigration and vegetation restoration measures taken since 1999.

关 键 词：NPP GIS 马尔科夫转移矩阵 叠置空间分析 榆林市 

分 类 号：K930[历史地理—人文地理学]