基于生物量的土地整治生态承载力分析——以阜平县荒山改造项目为例

Analysis of Ecological Carrying Capacity of Land Remediation Based on Biomass: Taking the Barren Hill Reconstruction Project in Fuping County as an Example

当前,土地整治工程多以最小化工程造价、最大化出地为目标,忽视场地生态承载力。对场地生态承载力进行定量分析,可促进土地整治工程考虑经济效益的同时兼顾生态保护。本研究基于河北省保定市阜平县某待整治荒山区域的植被群落调研、卫星影像和已有生物量数据,对比土地整治方案与荒山区域生物量,判断方案可行性。结果表明:NDVI植被指数的二次曲线回归模型为生物量最优拟合模型,可用于反演场地生物量;待整治荒山区域可稳定维持的生物量为2.366kg/m^2,低于土地整治方案作物种植周期内需维持的生物量2.574kg/m^2,这将导致环境进一步恶化和生态系统不可持续。

At present,local land remediation is mostly aimed at minimizing project cost and maximizing land excavation,ignoring the ecological carrying capacity of the site.Quantitative analysis of the ecological carrying capacity of land remediation sites will be carried out to promote the economic benefits of land remediation while paying more attention to ecological protection.Based on the vegetation community identification,satellite imagery and existing biomass data of barren hill area in Hebei Province,comparing the biomass of land remediation plan with that of the barren mountain area to judge the feasibility of the plan.The results show that the quadratic curve regression model of NDVI index is the best biomass fitting model,which can be used to invert the site biomass.The biomass that can be stably maintained in the barren hill area is 2.366kg/m^2,which is lower than the biomass to be maintained during the cycle of the remediation plan 2.574 kg/m^2,which will lead to further deterioration of the environment and unsustainable local ecosystems.