FOREST SOIL CARBON MODEL

摘要

PURPOSE: A forest soil carbon model is provided to estimate a change and a carbon amount of forest soil by applying an easily obtained stand information to the model. CONSTITUTION: A carbon amount in a forest tree is calculated by using a change of stand biomass caused by a volume change of a tree stem according to the age of stand (210). A carbon amount in a first apoptosis organic matter is calculated by using an output of apoptosis organic matters according to an apoptotic rate of the forest tree (220). A carbon amount in a second apoptosis organic matter is calculated by using a decomposition amount of the apoptosis organic matter (230). A stem mass per unit area is calculated by using lumber basis density and a stem volume. A mass of a branch, a leaf, and a rootlet per unit area is calculated by a switch coefficient and the stem mass. [Reference numerals] (210) Carbon amount in a forest tree is calculated by using a change of stand biomass caused by a volume change of a tree stem according to the age of stand; (220) Carbon amount in a first apoptosis organic matter is calculated by using an output of apoptosis organic matters according to an apoptotic rate of the forest tree; (230) Carbon amount in a second apoptosis organic matter is calculated by using a decomposition amount of the apoptosis organic matter; (AA) Start; (BB) End