陆地生态系统生产力模型研究进展

Research progress of net primary productivity model of terrestrial ecological system

目的通过净初级生产力(NPP)模型研究回顾,为全球陆地碳循环和全球变化等研究提供方法参考。方法把生产力模型大致归为3类,分别阐述其研究进展。结果气候相关模型通过对气候因子与植物干物质生产的相关性分析来估算植被的净初级生产力;生物地球化学循环模型以气候、土壤条件和植被类型为输入变量,主要模拟碳、水和营养物质的循环;基于遥感资料的模型基于植被指数与冠层吸收的光合有效辐射部分之间的关系得到吸收光合有效辐射,进而建立大尺度的卫星观测与生物生产力的关系。结论无论应用哪种生产力模型,都受到较多条件的限制,因此,目前应用模型计算净初级生产力仍存在一些不足之处。

Aim To provide reference on methods of the global terrestrial carbon cycle and global change research by reviewing the research progress of net primary productivity（NPP） model. Methods NPP models fall into three catalogs and then their developments were discussed. Results Climatic correlation models refer to that NPP is estimated on the basis of the correlation analysis of climatic factors and plant dry matter production;biological earth chemical models,regarding climate,soil conditions and vegetation types as input variables,mainly simulate the cycle of carbon,water and nutrient;the models based on remote sensing data means that the absorption of photosynthetic active radiation is obtained by connecting vegetation index with canopy absorption,thus establishing the relationship between a large scale satellite observations and biological productivity. Conclusion Every productivity model is limited by more conditions.Therefore,the deficiencies in NPP measurement through modeling were presented.