南亚热带六种典型人工林碳收支研究  

Carbon budget of six typical plantations in south subtropical zone

作　　者：周平[1] 林雯[2] 符式培 李威 李吉跃[2] 

机构地区：[1]广东省林业科学研究院,广州510520 [2]华南农业大学,广州510642 [3]广州市白水寨森林公园管理处,广州511300

出　　处：《生态科学》2015年第6期111-117,共7页Ecological Science

基　　金：广州市森林碳汇计量与监测研究项目(GZFC-KT2);林业公益性行业科研专项(201204104)

摘　　要：集成生物圈模型(IBIS)有效整合了陆地生态系统的地表过程、植被冠层过程、植被物候和植被动态,被广泛应用于研究生态系统的碳平衡和碳收支情况。在采集研究区域气象数据、植被功能型和光合参数、叶面积指数、各植被类型枯落物月分解比例、土壤参数的基础上,运用IBIS模型对广州市六种林分的总生产力(GPP)、净第一性生产力(NPP)、生态系统净生产力(NEE)进行了预测,结合每种林分碳储量、年固碳量的野外实测数据,对模型的运行结果进行了验证。结果表明,阔叶林的GPP和NPP均高于针叶林;从时间序列来看,NPP和NEE月变化数据呈双峰曲线,两个峰值分别出现在春季和秋季,而夏季较少,这可能与夏季的自养呼吸和异养呼吸高有关。该研究有助于理解位于南亚热带植被的碳动态规律。Due to its effective integration of land surface processes in terrestrial ecosystems, vegetation canopy characteristics, vegetation phenology, and vegetation dynamics, Integrated Biosphere Model （IBIS） is widely applied to study the ecosystem carbon balance and carbon budgets. Based on the collection of meteorological data in this study area, vegetation types and photosynthesis parameters, leaves area indices, litter fall decomposition proportions, and soil parameters, we used IBIS model to evaluate the total primary productivity （GPP）, net primary productivity （NPP）, and net ecosystem productivity （NEE） of six forests. The model was validated by using the data collected from the field investigation regarding carbon pools and annual carbon sequestration. Results show that the hardwood forests of GPP and NPP are higher than coniferous forests. In term of the time series, monthly NPP and NEE data show bimodal curves with two peaks appearing in both spring and autumn, with lower value in summer. It might be due to the higher autotrophic and heterotrophic respirations in summer. This study helps to understand temporal patterns of carbon dynamics in the south subtropical region.

关 键 词：IBIS模型 森林生态系统 碳收支 总生产力 净生产力 呼吸 

分 类 号：Q948[生物学—植物学]