基于个体的中国森林生态系统碳收支模型FORCCHN及模型验证

以植物生理学、森林生态学和土壤环境学的基本原理为基础,建立了基于个体的中国森林生态系统碳收支模型FORCCHN。模型通过两种步长运行:在步长为天时的基本过程包括林分(个体)的光合、呼吸、分配和凋落,以及凋落物和土壤有机物的呼吸和转移;在步长为年时的基本过程包括林分的同化物分配、树高和胸径增长、大凋落物生成。通过对模型样地水平上与全国总量上NPP、NEP的验证,说明该模型在考虑幼龄林基础上,能较好的模拟出中国森林生态系统的碳收支,因此可以用来模拟中国森林生态系统碳收支的过去动态和未来发展趋势。

Establishing and validation individual-based carbon budget model FORCCHN of forest ecosystems in China

According to the principles of plant physiology, forest ecology and soil environment,the individual-based carbon budget model of forest ecosystems in china was established. The model process included two timesteps: the primary daily process comprises photosynthesis, plant respiration, allocation and litter production, soil respiration and transfer; the primary annual process consists of allocation between stands, increasing of tree height and breast diameter and producing large amount of litter fall. Through validating NPP and NEP at the plot level and at the country level, it was demonsteated that the model can well simulate carbon budget of forest ecosystem of China, so it can also simulate dynamics of carbon budget of forest ecosystems in the past and in the future.