水土保持研究2025，Vol.32Issue(3)：206-213,221,9.DOI:10.13869/j.cnki.rswc.2025.03.031
延河流域植被净初级生产力时空演变及其驱动机制
Spatiotemporal evolution of vegetation net primary productivity and its driving mechanism in the Yanhe River Basin
摘要
Abstract
[Objective]To provide a scientific basis and theoretical reference for ecological restoration and enviro-nmental protection in the Yanhe River Basin,this study explores spatiotemporal variation characteristics of vegeta-tion net primary productivity(NPP)and analyzes its driving factors and underlying mechanisms.[Methods]Based on MODIS data,trend analysis,coefficient of variation,and correlation analysis were used to analyze the spatiotemporal dynamics,stability,and the response relationship between vegetation NPP and influencing factors in the Yanhe River Basin from 2000 to 2020.[Results](1)The average vegetation NPP in the Yanhe River Basin from 2000 to 2020 was 321.18 gC/(m2·a),exhibiting a significant upward trend(p<0.01).(2)The distribution of NPP showed higher values in the south and lower values in the north.(3)Over 70%of the Yanhe River Basin exhibited relatively high or very high fluctuations in vegetation NPP,mainly in the northeast of the basin and most areas of Zhidan County.(4)From 2000 to 2020,temperature and precipitation in the Yanhe River Basin showed fluctuating increases,with precipitation promoting the positive growth of vegetation NPP,while temperature inhibited the increase of NPP to a certain extent.(5)Both temperature and precipitation contributed to vegetation NPP change in the northwestern part of the Yanhe River Basin,with temperature having a larger impact than precipitation.[Conclusion]Vegetation NPP in the Yanhe River Basin was influenced by temperature and precipitation,with the minimum and maximum values occurring in 2000 and 2018,respectively.The'returning farmland to forest(grassland)policy'has a positive impact on vegetation productivity and ecosystem health.关键词
时空动态/净初级生产力(NPP)/气候影响/相关性分析/延河流域Key words
spatiotemporal dynamics/net primary productivity(NPP)/climate impact/correlation analysis/the Yanhe River Basin分类
生物学引用本文复制引用
张格语,陈雅娴,陈文红,温仲明,刘洋洋,贾东升,林子琦,任涵玉,韩沛东,玉苏普喀迪尔·孜米尼..延河流域植被净初级生产力时空演变及其驱动机制[J].水土保持研究,2025,32(3):206-213,221,9.基金项目
国家自然科学基金项目(42107512) （42107512）
陕西省重点研发计划(2024SF-YBXM-621) （2024SF-YBXM-621）
陕西林业科技创新重点专项(SXLK2022-02- （）
