生态环境学报2026，Vol.35Issue(2)：232-244,13.DOI:10.16258/j.cnki.1674-5906.2026.02.007
石羊河流域氮保持功能评估与未来情景预测
Assessment and Future Scenario Prediction of Nitrogen Retention Function in the Shiyang River Basin
摘要
Abstract
Nitrogen retention is a key ecological regulation service,and land-use change is the main driving force affecting its spatiotemporal dynamics.Revealing the response mechanism of nitrogen retention functions to land use pattern evolution is of great significance for promoting sustainable agricultural development in watersheds and effectively controlling non-point source pollution.By coupling the FLUS and InVEST models,this study simulated land use changes in the Shiyang River Basin under different development scenarios for 2035 and assessed the response of its nitrogen retention function.The study found that 1)the current year's nitrogen retention amount was 1.61×104 t,the cultivated land protection scenario was 1.82×104 t,the natural development scenario was 2.10×104 t,and the ecological protection scenario was 2.13×104 t.The nitrogen retention amounts in different scenarios were significantly higher than that in the current year,with the ecological protection scenario showing the largest increase and the cultivated land protection scenario showing a relatively smaller increase.2)Using the natural breakpoint method,the nitrogen retention intensity across counties under different scenarios was classified into five levels,identifying Yongchang County and Liangzhou District as important areas for water quality purification functions.3)Compared to the current year,under the cultivated land protection and natural development scenarios,the land-use type with the largest increase in nitrogen retention is farmland,whereas under the ecological protection scenario,grassland sees the most increase in nitrogen retention.4)Population density was the dominant driving factor influencing the spatial differentiation of nitrogen retention in the watershed(q=0.126).The most influential interaction factor was soil type ∩ population density,with a q-value of 0.221.Nitrogen retention exhibited significant spatial clustering effects,displaying"high-high"and"low-low"clustering characteristics.These results provide a scientific basis for enhancing nitrogen retention capacity and controlling non-point source pollution in watersheds.关键词
氮保持功能/多情景模拟/FLUS模型/InVEST模型/石羊河流域Key words
nitrogen retention function/multi-scenario simulation/FLUS model/InVEST model/Shiyang River Basin分类
天文与地球科学引用本文复制引用
侯慧敏,李浩浩,王辉,王鹏全,包志强,任志伟..石羊河流域氮保持功能评估与未来情景预测[J].生态环境学报,2026,35(2):232-244,13.基金项目
甘肃省水利科学试验研究及技术推广计划项目(23GSLK044 （）
23GSLK045 （）
23GSLK046 （）
25GSLK045) （）
