2005—2014年南方农牧交错带净初级生产力时空分布特征  

Temporal-Spatial Characteristics of the Vegetation Net Primary Production in the Farming-Pastoral Eco-Tone of Southern China During 2005—2014

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 Normal University,Mianyang,Sichuan 621000,China)

机构地区：[1]绵阳师范学院资源环境工程学院,四川绵阳621000

出　　处：《水土保持研究》2018年第6期236-241,共6页Research of Soil and Water Conservation

基　　金：生态安全与保护四川省重点实验室开放资助项目(ESP1707);绵阳师范学院科研启动项目(QD2016A001)

摘　　要：为了解我国南方农牧交错带内生态系统生产能力的变化程度,以2005—2014年MOD17A3H数据为数据源,利用简单差值法和一元线性回归分析法,对区内的植被年均NPP空间分布及变化趋势进行了分析。结果表明:(1)2005—2014年南方农牧交错带内植被NPP分布差异较大,整体呈南部高北部低。(2)年均植被NPP为389gC/(m^2·a),平均植被NPP变化范围在344～426gC/(m^2·a)之间。(3)2014年较2005年相比,南方农牧交错带植被NPP增加了106gC/(m^2·a)。但10年间植被NPP总体变化呈略微减少趋势,减少的地区面积占南方农牧交错区总面积的57%。(4)不同生态系统平均植被NPP均值表现为:森林生态系统>农田生态系统>灌丛生态系统>湿地生态系统>草地生态系统;不同生态系统植被NPP变化相似,呈波动略微减少变化。说明区域内生态系统变化波动较为明显,应对该区域生态系统给予更多的保护。In order to understand the change degree of ecosystem productivity in the farming-pastoral eco-tone southern China,the 2005-2014 annual vegetation NPP data from MOD17A3H dataset was used to analyze the inter-annual variation vegetation NPP and distribution of the average annual vegetation NPP by difference method and a linear regression.The research results indicated that:(1)significant differences in distribution of vegetation NPP presented a decrease trend from north to south,the average annual vegetation NPP was 389 gC/(m 2·a),average annual vegetation NPP change ranged from 344 gC/(m 2·a)to 426 gC/(m 2·a))in the farming-pastoral eco-tone of southern China during 2005-2014;(2)the average annual vegetation NPP increased by 106 gC/(m 2·a)in 2014,the change presented a slight decrease trend,the areas with the decreased annual vegetation NPP accounted for 57%of the territory of the farming-pastoral eco-tone of southern China;(3)the average vegetation NPP for different ecosystems decrased in the sequence:that forest ecosystem>farmland ecosystem>scrub ecosystem>wetland Ecosystem>grassland Ecosystem;the change of vegetation NPP in different ecosystems was similar,and showed a slight decrease trend.It indicated that the fluctuation of ecosystem changes was more obvious and the protection of ecosystem should be strengthened.

关 键 词：NPP 时空变化 农牧交错带 MOD17A3H 

分 类 号：Q948[生物学—植物学]