农业环境科学学报2026，Vol.45Issue(5)：1212-1224,13.DOI:10.11654/jaes.2025-0565
长江口横沙岛滩涂不同年限围垦区土壤和植被的协同演变
Synergistic evolution of soil and vegetation in different years of reclamation area on Hengsha Island
摘要
Abstract
This study focused on the Pudong reclamation area of Hengsha Island in the Yangtze Estuary,aiming to the spatiotemporal evolution laws and interaction mechanisms of soil physicochemical properties and vegetation coverage under different reclamation ages,and to reveal the ecological succession process of coastal reclamation areas providing a scientific basis for ecological restoration and land management.The study investigated four representative areas with distinct reclamation histories:newly reclaimed(Y3,3 years),short-medium term restored(Y7,7 years),medium term restored(Y10,10 years),and long-term restored(Y15,15 years).Soil physicochemical parameters(including pH,electrical conductivity,total salinity,total nitrogen,total phosphorus,total potasium)were analyzed.Vegetation indices were derived from Landsat/Sentinel imagery,with NDVI calculated and FVC estimated using the pixel dichotomy model.Correlation analysis,Mantel test and stepwise regression method were used to analyze the driving effect of soil on vegetation.The results showed that:the soil properties showed significant temporal sequence changes:with the increase of the reclamation age,pH,electrical conductivity and total salinity content decreased continuously(P＜0.05),while the content of total nitrogen,total phosphorus and total potassium increased significantly(P＜0.001).Vegetation coverage showed gradual increase:the NDVI increased from reclamation for Y3(0.12±0.05)to reclamation for Y15(0.35±0.09),and the FVC increased synchronously,the vegetation community successioned from salt-tolerant pioneer species to high coverage community.Soil-vegetation coupling analysis showed that organic matter,total nitrogen,and total phosphorus were significantly positively correlated with the NDVI(P＜0.01),while pH,electrical conductivity,and total salinity were negatively correlated.Stepwise regression showed that pH,total nitrogen,and organic matter were the dominant factors of the NDVI(R2=0.787).The soil properties of Hengsha Island beach reclamation area gradually improved with the increase of the reclamation age,promoted the restoration of vegetation,among which the accumulation of organic matter and total nitrogen and the decrease of pH were the key driving factors.关键词
滩涂围垦/土壤理化/植被覆盖度/生态修复Key words
tidal flat reclamation/soil physicochemical properties/vegetation coverage/ecological restoration分类
资源环境引用本文复制引用
刘栋,郑宪清,杨晓磊,宋科,吕卫光,刘彬,李法云,张月,李肖肖..长江口横沙岛滩涂不同年限围垦区土壤和植被的协同演变[J].农业环境科学学报,2026,45(5):1212-1224,13.基金项目
上海市农业科技创新项目(2024-02-08-00-12-F00046)Shanghai Agricultural Science and Technology Innovation Program(2024-02-08-00-12-F00046) （2024-02-08-00-12-F00046）
