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应用生态学报 ›› 2020, Vol. 31 ›› Issue (3): 706-716.doi: 10.13287/j.1001-9332.202003.018

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长白山阔叶红松林生产力随林分发育的变化

李旭华1,2, 于大炮3, 代力民3, 孙建新1*   

  1. 1北京林业大学, 北京 100083;
    2四川省林业科学研究院, 成都 610081;
    3中国科学院沈阳应用生态研究所森林生态与管理重点实验室, 沈阳 110016
  • 收稿日期:2019-10-18 出版日期:2020-03-15 发布日期:2020-03-15
  • 通讯作者: E-mail: sunjianx@bjfu.edu.cn
  • 作者简介:李旭华, 女, 1988年生, 博士。主要从事森林生态与全球气候变化生态学研究。E-mail: xhli2011@126.com
  • 基金资助:
    本文由国家林业公益性行业科研专项(201404201)资助

Changes of productivity with stand development in broadleaf-Korean pine forest in Changbai Mountain, China

LI Xu-hua1,2, YU Da-pao3, DAI Li-min3, SUN Jian-xin1*   

  1. 1Beijing Forestry University, Beijing 100083, China;
    2Sichuan Academy of Forestry Sciences, Chengdu 610081, China;
    3Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2019-10-18 Online:2020-03-15 Published:2020-03-15
  • Contact: E-mail: sunjianx@bjfu.edu.cn
  • Supported by:
    This work was supported by the Forestry Research for the Public Benefits of China (201404201)

摘要: 林龄是影响森林生态系统碳储量和碳通量的一个关键因子。量化森林生产力随林分发育的变化规律,对于优化林龄结构,促进资源利用最大化,更好地发挥森林在调节CO2吸收、储存和释放中的作用十分重要。本研究采用空间代替时间法,在露水河林区设置12块不同发育阶段的阔叶红松林样地,运用经本地参数化的Biome-BGC模型,模拟了阔叶红松林净初级生产力(NPP)随林分发育的动态变化,分析了阔叶红松林NPP在4种发育情景模式下随林分发育的变化规律。结果表明: 不同龄组阔叶红松林的生物量表现为幼龄林<中龄林<成熟林<过熟林,其平均生物量分别为(224.35±20.68)、(237.23±39.96)、(259.16±19.51)和(357.57±84.74) t·hm-2。模型模拟的不同发育阶段阔叶红松林NPP的变化范围为489.8~588 g C·m-2·a-1,模拟结果与MODIS观测结果有较好的一致性,反映了Biome-BGC模型模拟阔叶红松林碳通量的合理性和准确性。模型模拟的阔叶红松林NPP随林分发育呈先增加后下降的变化趋势,在中龄林时达到最高,过熟林时最低。4种阔叶红松林发育动态情景模式下的NPP变化特征表明,在起始状态为人工种植红松林的自然发育和发育过程中对阔叶树实施采伐控制的两种情景下,成熟林时期NPP最高;而在起始状态为天然次生白桦林的自然发育和经人为采伐动态控制的两种情景下,均表现为幼龄期NPP最高。

Abstract: Stand age is a key factor affecting carbon stocks and fluxes of forest ecosystem. Quantification of the changes in forest productivity with stand development is critically important for optimizing forest age structure, facilitating maximum utilization of resources, and better realizing the role of forests in regulating the uptake, storage, and emission of CO2. In this study, using space for time substitution approach, we established 12 chronosequence plots in the broadleaf-Korean pine forests of Lushuihe. Using a locally parameterized Biome-BGC model, we simulated the dynamics of net primary productivity (NPP) with stand development and examined the changes with stand development in NPP of broadleaf-Korean pine forests under four developmental scenarios. Results showed that the biomass in broadleaf-Korean pine forests of different age-classes ranked in the order of young stand < mid-age stand < mature stand < over-mature stand, with the average value of (224.35±20.68), (237.23±39.96), (259.16±19.51), and (357.57±84.74) t·hm-2, respectively. Modelled NPP in broadleaf-Korean pine forests of different developmental stages varied in the range of 489.8-588 g C·m-2·a-1, which were consistent with the observed data of MODIS NPP, highlighting the adequacy and accuracy of Biome-BGC model in simulating the carbon flux of broadleaf-Korean pine forests. Simulated NPP displayed a pattern of initial increase and later decrease with stand development, reaching peak in the mid-age stand and being smallest in the over-mature stand. Simulations of NPP in broadleaf-Korean pine forest under four developmental scenarios showed that, for the two scenarios with planted Korean pine forests experiencing either natural development or controlled cutting, NPP was highest in the mature stage; whereas for the two scenarios with initial natural secondary birch forests experiencing either natural development or controlled cutting, NPP was highest in the young stage.