四川环境2025，Vol.44Issue(1)：41-49,9.DOI:10.14034/j.cnki.schj.2025.01.006
河北省植被净初级生产力时空变化及其对干旱的响应
Temporal and Spatial Changes of Net Primary Productivity of Vegetation in Hebei Province and Its Response to Drought
摘要
Abstract
In this study,uses standardized precipitation evapotranspiration index(SPEI)and remote sensing data of net primary productivity(NPP)of vegetation was used,to analyze the temporal and spatial changes of vegetation NPP in Hebei Province and its response characteristics to drought from 2000 to 2020,employing by using methods such as Sen's trend analysis,Mann-Kendall significance test,and correlation analysis.The results indicated that,on a temporal scale,on the seasonal and annual sacales,NPP of vegetation in Hebei Province shows ed an upward trend,wherein of which the summer increase rate is was the fastest.The summer and annual increase rate respectively were 2.44 gC·m-2a-1 and 5.18 gC·m-2a-1,respectively.The NPP increase rate of sward NPP iswas the highest among different land use types.On a the spatial scale,The the NPP of vegetation shows showed an upward trend in all seasons,wherein of which the region of significant improvement in spring being was the largest.The vegetation improvement area in Hebei Province on the annual scale accounts accounted for 91.3％,indicating,the vegetation growth has entirety improvement in Hebei Province.In autumn,SPEI of Hebei Province SPEI showsed an upward trend,indicating drought lightenwas migrated.SPEI showed a downward trend and the draught was aggravated.,Othertimes show a downward trend,drought increased,on both seasonal and annual scales,the correlation on the seasonal and annual scale,between vegetation NPP and SPEI of vegetation in Hebei Province iswas mainly positively correlationcorrelated.The responsedegree of NPP of vegetation on the seasonal scale vegetation NPP to drought is was ranked as summer＞spring＞autumn,NPP of woodlandand sward of different land use types is the greatest in response to drought.关键词
植被净初级生产力/标准化降水蒸散指数/时空变化/相关性/河北省Key words
Net primary productivity of vegetation/standardized precipitation evapotranspiration index/temporal and spatial change/correlation/Hebei Province分类
环境科学引用本文复制引用
魏丽欣,赵春雷,孟成真,张会,张良玉..河北省植被净初级生产力时空变化及其对干旱的响应[J].四川环境,2025,44(1):41-49,9.基金项目
河北省气象局科技项目(21zc08) （21zc08）
中国气象局创新发展专项(CXFZ2023P021). （CXFZ2023P021）
