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将生态过程模型中营养元素生物循环数值模拟、基于过程的植被生产力模型与遥感驱动的光能利用率模型相耦合,构建森林植被营养元素生物循环空间信息模型。模型弥补了营养元素生物循环过程模型中空间分析和参数获取复杂的不足,并在植被生产力光能利用率模型中引入营养元素胁迫的定量表达。将模型模块化,耦合于自主开发的EcoHAT系统(Eco-Hydrology Assessment Tools),以贵州典型森林群落为研究对象,对群落生产力和营养元素生物循环的关键过程的时空演变模式进行了模拟和研究。运用实验数据进行验证,取得良好的效果,可见模型计算可以较为真实地反映区域营养元素生物循环关键过程的时空格局。
Bio-cycle numerical simulation of nutrient elements in eco-process model, vegetation-productivity-based process model and remote sensing-driven model of light energy utilization are coupled to construct a bio-cycle spatial information model of nutrient elements in forest vegetation. The model makes up the complex deficiencies of spatial analysis and parameter acquisition in the nutrient cycling process model and introduces the quantitative expression of nutrient stress in the model of solar energy utilization of vegetation productivity. The model was modularized and coupled with Eco-Hydrology Assessment Tools developed by ourselves. The typical forest community in Guizhou Province was selected as the research object to simulate and study the spatial and temporal evolution of the key processes of community productivity and nutrient cycling. The experimental data are used for validation and good results are obtained. It can be seen that the model calculation can more accurately reflect the spatial-temporal pattern of the key process of nutrient cycling in the area.