植物生态学报 ›› 2016, Vol. 40 ›› Issue (4): 405-415.DOI: 10.17521/cjpe.2015.0208

• 研究论文 • 上一篇    下一篇

基于CO2FIX模型的华北落叶松人工林碳循环过程

贾彦龙1,2, 李倩茹1,2, 许中旗1,*(), 桑卫国3   

  1. 1河北农业大学林学院, 河北保定 071000
    2中国科学院地理科学与资源研究所, 北京 100101
    3中国科学院植物研究所植被与环境变化国家重点实验室, 北京 100093
  • 收稿日期:2015-06-08 接受日期:2016-01-18 出版日期:2016-04-29 发布日期:2016-04-30
  • 通讯作者: 许中旗
  • 基金资助:
    中国科学院战略性先导科技专项(XDA05050203-02-01)和河北省科技厅科技支撑项目(10236728)

Carbon cycle of larch plantation based on CO2FIX model

Yan-Long JIA1,2, Qian-Ru LI1,2, Zhong-Qi XU1,*(), Wei-Guo SANG3   

  1. 1College of Forestry, Agriculture University of Hebei, Baoding, Hebei 071000, China

    2Institute of Geographic Sciences and Natural Resources Research, Beijing 100101, China
    and
    3 State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing100093, China
  • Received:2015-06-08 Accepted:2016-01-18 Online:2016-04-29 Published:2016-04-30
  • Contact: Zhong-Qi XU

摘要:

为了探明华北落叶松(Larix gmelinii var. principis-rupprechtii)人工林的碳循环过程, 该研究以河北围场地区的华北落叶松人工林为例, 基于CO2FIX模型, 以在当地的实际调查数据、文献数据作为输入数据, 从生物量、土壤和木质林产品碳库3个方面探讨了华北落叶松人工林的碳循环过程和碳汇能力。结果表明: 华北落叶松人工林土壤碳库最大, 生物量碳库次之, 林产品碳库最小, 但是林产品碳库随时间呈逐渐增加的趋势; 在一个轮伐期内(50年), 每公顷华北落叶松人工林约固定了250 t碳, 其中约70%通过凋落物和采伐剩余物的方式进入土壤碳库, 约30%进入木质林产品碳库; 华北落叶松人工林在生长的大部分时间是一个碳的吸收汇, 而在森林采伐时成为暂时的排放源, 从长时间尺度上看, 每公顷华北落叶松人工林每年大约固定0.3 t左右的碳。该研究结果表明了木质林产品碳库在人工林碳循环中的重要作用, 这将有助于更加全面地认识人工林的碳循环过程和碳汇能力。

关键词: 华北落叶松人工林, 碳循环, 模型模拟, 碳汇能力

Abstract:

Aims
Plantations play important roles in modifying regional carbon budget and maintaining regional carbon balance. In this study, we assessed larch plantation (Larix gmelinii var. principis-rupprechtii) carbon dynamics in Weichang County from a perspective of the forest biomass-soil-wood-products chain. Our objectives were to elucidate the carbon sink capacity of larch plantation and the influences of biomass, soil and wood product pools on carbon balance.
Methods
CO2FIX model was used to evaluate the carbon storage and flow of larch plantation over a time span of 120 years. Input data for model were derived from practical investigations and published papers. We validated the simulated results and found that this model was suitable in the region and the simulated results were reliable.
Important findings
(1) Soil was the largest carbon pool for larch plantation and the wood product pool had the smallest carbon storage. Meanwhile, carbon storage in wood products gradually increased with time. (2) In a rotation of 50 years from secondary poplar-birch forest to larch plantation, 250 t C·hm-2 was sequestrated by the larch plantation. 70% of the carbon was transferred into soil in the form of litter and logging slash and the other 30% was transferred into wood products. (3) Larch plantation was a carbon sink during most of its growing period and turned to temporary carbon source when it was harvested. Larch plantation could sequestrate about 0.3 t C·hm-2·a-1 in the long term. Our results indicated the importance of wood product carbon pool in carbon dynamics of plantation, which facilitated our understanding in the carbon dynamics and capacity of plantation.

Key words: larch plantation, carbon cycle, CO2FIX model, carbon sequestration