西南农业学报2025，Vol.38Issue(10)：2089-2098,10.DOI:10.16213/j.cnki.scjas.2025.10.005
农牧交错带2000-2020年植被NDVI变化趋势及影响因素分析
Trend of vegetation NDVI and its influencing factors in agro-pastoral transition zone from 2000 to 2020:A case study of Yanchi county,Ningxia
摘要
Abstract
[Objective]The present paper aimed to further reveal the trend of vegetation changes in the agro-pastoral transition zone and clarify the impact of climate change and human activities on vegetation growth,the study examines the interactive processes between climate and the Normalized Difference Vegetation Index(NDVI)in Yanchi county from 2000 to 2020.[Method]Based on the Google Earth Engine(GEE)platform,Landsat remote sensing images were used.The Normalized Vegetation Index(NDVI)data of Yanchi county was obtained from 2000 to 2020,and a series of analytical methods were employed to assess the vegetation growth in the area,including trend analysis,correlation a-nalysis,coefficient of variation and the Theil-Sen median trend analysis combined with the Mann-Kendall test.The same set of analysis tools was then used to systematically analyze the spatio-temporal characteristics of vegetation NDVI in Yanchi county over the past 20 years.The in-tegration of meteorological and digital elevation data enabled the exploration of the spatio-temporal pattern of vegetation growth and its driving factors in Yanchi county from 2000 to 2020.The study revealed the growth spatio-temporal pattern and its driving factors.[Result](i)Dur-ing the period under study,NDVI values in Yanchi county exhibited fluctuations and increased between 0.15 and 0.45,with frequent interan-nual variations,and it increased at a significant rate of 0.088 per decade;(ⅱ)A significant increase in NDVI was observed in 28.21％of the county,with most areas exhibiting stable vegetation growth.(ⅲ)The NDVI volatility exhibited a weakening trend.The annual average tem-perature was the primary factor influencing the fluctuation of NDVI,and the strength of the influence of annual precipitation was only second to that of the annual average temperature.(iv)Human activities were the primary factor driving the long-term increase of NDVI,and the rela-tive role of human activities in improving vegetation amounted to 56.27％.[Conclusion]Therefore,ecological restoration in the agro-pastoral transition zone should focus on protection,combined with moderate ecological reconstruction,promote comprehensive protection through rea-sonable development and achieve a balance between ecology and development.关键词
农牧交错带/NDVI/人类活动/气候变化/残差分析Key words
Agro-pastoral transition zone/NDVI/Human activities/Climate change/Residual analysis分类
农业科技引用本文复制引用
史银龙,潘海珠,张丽娟,张晓晶,董彦斌..农牧交错带2000-2020年植被NDVI变化趋势及影响因素分析[J].西南农业学报,2025,38(10):2089-2098,10.基金项目
宁夏重点研发项目(引才专项)(2021BEB04038) （引才专项）
国家重点研发计划项目(2021YFD1900604) （2021YFD1900604）
宁夏自然科学基金项目(2021AAC03115) （2021AAC03115）
