森林碳汇收益的实证分析——以广东省杉木林为例

Optimal Forest Harvest Age Considering Carbon Sequestration in Multiple Carbon Pools——Taking Fir Forest in Guangdong as an Exampk

以Hartmann模型为基础,扩展成考虑木材的经济效益,生物量碳库、死生物质碳库(DOM)以及林产品碳库的碳汇效益的最优轮伐期模型。并以广东地区的杉木林为例,比较在不同碳价、不同利率以及考虑不同碳库时的最优轮伐期及林地期望值。结果表明,在当前的碳汇价格下,考虑碳汇效益后的林地期望值会增加,但最优轮伐期保持不变。当碳汇价格为200元每吨时,最优轮伐期才会开始延长。利率的变化对最优轮伐期的影响不明显,但对林地期望值的影响很大。

Based on the model of Hartmann, we expanded it into a comprehensive optimal rotation model considering the economic benefits of wood, biomass carbon pool, DOM carbon pool and forest products carbon pool. And Chinese fir in Guangdong Province was taken for a numerical example to find how optimal rotation age and LEV changed when different carbon prices, interest rates, and different carbon pool were considered. Results show that under the current price of carbon sinks, when consider carbon, LEV will increase, but the optimal rotation age remains unchanged. When the carbon price is RMB 200 per tons, optimal rotation age will begin to extend. Interest rate affects the optimal rotation age a little, but has a great influence on LEV.