CARBON STORAGE IN MANAGED FORESTS
CARBON STORAGE IN MANAGED FORESTS
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DOI：
10.1139/x83-022
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发表时间：
1983-01-01
影响因子：
2.2
通讯作者：
COOPER, CF
中科院分区：
文献类型：
--
作者：
COOPER, CF
森林中储存的碳的质量是全球碳循环的重要组成部分。建立了一个通用模型，将为维持产量而管理的森林生命周期内的平均碳储量与成熟期同一森林的最大生物量之间的关系联系起来。利用Richards函数建立了林分生长的感染点。如果对森林进行管理以获得最大的生物量持续产量，则平均寿命C贮存量约为成熟时的1/3。生长拐点对这一比例影响不大。如果加上收获后碎屑的积累和分解，在温落叶林中，碎屑的比例约为0.5，在热带较少，在北方森林中较多。在金融成熟期收获，通过缩短轮作，不成比例地将终身碳储量减少到最大值的0.2。非木材价值可能会对碳储量产生积极或消极的影响。森林再生和包括树木在内的多物种农业系统可能会比人们有时认为的更多地解释热带地区的碳储存。
The mass of C stored in forests is an important component of the global C cycle. A general model is developed to relate average C storage over the lifetime of a forest managed for sustained yield to the maximal biomass of the same forest at maturity. Point of infection of stand growth is established using the Richards function. If a forest is managed for maximum sustained yield of biomass, mean lifetime C storage is about 1/3 that at maturity. Point of growth inflection has little effect on this fraction. When accumulation and decomposition of detritus after harvest are added, the fraction is about 0.5 in temperature deciduous forests, less in the tropics and more in boreal forests. Harvest at financial maturity, by shortening the rotation, disproportionately reduces lifetime C storage to perhaps 0.2 of the maximum. Nontimber values may affect C storage either positively or negatively. Forest regrowth and multispecies agricultural systems that include trees may account for more C storage in the tropics than is sometimes assumed.