高级检索
    谢伊, 杨华. 长白山天然云冷杉针阔混交林主要树种胸径生长与林分空间结构的关系[J]. 北京林业大学学报, 2022, 44(9): 1-11. DOI: 10.12171/j.1000-1522.20210280
    引用本文: 谢伊, 杨华. 长白山天然云冷杉针阔混交林主要树种胸径生长与林分空间结构的关系[J]. 北京林业大学学报, 2022, 44(9): 1-11. DOI: 10.12171/j.1000-1522.20210280
    Xie Yi, Yang Hua. Relationship between stand spatial structure and DBH increment of principal species in natural spruce-fir mixed forest in Changbai Mountains of northeastern China[J]. Journal of Beijing Forestry University, 2022, 44(9): 1-11. DOI: 10.12171/j.1000-1522.20210280
    Citation: Xie Yi, Yang Hua. Relationship between stand spatial structure and DBH increment of principal species in natural spruce-fir mixed forest in Changbai Mountains of northeastern China[J]. Journal of Beijing Forestry University, 2022, 44(9): 1-11. DOI: 10.12171/j.1000-1522.20210280

    长白山天然云冷杉针阔混交林主要树种胸径生长与林分空间结构的关系

    Relationship between stand spatial structure and DBH increment of principal species in natural spruce-fir mixed forest in Changbai Mountains of northeastern China

    • 摘要:
        目的  混交林的稳定性、发展的可能性与空间结构密切相关,探究空间结构对林分生长量的影响对促进林分良性发展有着重要作用。本研究以天然云冷杉针阔混交林为对象,分析混交度(M)和大小比数(U)对单木生长量的影响,以期为该地区天然林林分结构调整提供科学依据和指导。
        方法  选用2块云杉蓄积占总蓄积比例分别为0.1~0.2(1成云,1P)和0.4(4成云,4P)固定样地的5期监测数据,采用4株相邻木法计算空间结构三参数,绘制多元分布图,分析了1P和4P内各径级云杉、臭冷杉和红松在不同混交度和大小比数的胸径生长量变化规律。
        结果  1P和4P均介于中度和强度混交(M分别为0.625和0.657)且呈随机分布;臭冷杉和红松的生长介于亚优势至中庸状态间(U = 0.25 ~ 0.50),云杉在4P内介于亚优势至中庸状态间(U = 0.48),在1P内介于中庸至劣势状态间(U = 0.70)。云杉和臭冷杉的年胸径生长量随径级的增大而增大(P < 0.05);随对象木混交度的增大而增大,其中小径级云杉和大中小径级臭冷杉与混交度呈显著相关(P < 0.05);云杉、臭冷杉和红松的年胸径生长量随对象木大小比数的增大而减小,其中中径级木与大小比数呈显著相关(P < 0.05)。云杉在1P内的年胸径生长量低于4P,红松相反。
        结论  不同径级下林木的生长具有显著差异,降低大小比数的同时适当提高混交度有利于林木的胸径生长。不同生长阶段的竞争不同导致了不同径级林木对混交度和大小比数响应的差异,故针对不同生长阶段的林木应采取不同的经营措施调整优化林分结构,促进林分长期的稳定发展。

       

      Abstract:
        Objective  The stability and development possibility of mixed forest are closely related to its spatial structure. Exploring the influence of spatial structure on stand growth plays an important role in promoting the benign development of forest.
        Method  Based on the 5 periods of monitoring data of two fixed sample plots, the proportion of spruce (Picea jezoensis) accumulation in the sample plot was 0.1−0.2 and 0.4, respectively, which were recorded as 1P and 4P. The three parameters of spatial structure were calculated by 4 adjacent tree methods, and the multivariate distribution map was drawn. The changes of DBH increment of spruce, fir (Abies nephrolepis) and Korean pine (Pinus koraiensis) under different diameter classes, mingling degrees and neighborhood comparison in 1P and 4P were compared and analyzed.
        Result  1P and 4P were both medium and strong mixed (M was 0.625 and 0.657, respectively) and randomly distributed. The growth of fir and Korean pine was between sub-dominant state and median state (U = 0.25 − 0.50), the growth of spruce was between sub-dominant state and median state (U = 0.48) in 1P, and was between median state and inferior state in 4P (U = 0.70). The annual DBH increment of spruce and fir increased with the increase of DBH class (P < 0.05) and the mingling degree of subject trees, and the DBH increment of small-diameter spruce and large, medium and small diameter’s fir was significantly correlated with mingling degree (P < 0.05). The annual DBH increment of spruce, fir and Korean pine decreased with the increase of subject trees’ neighborhood comparison, and the correlation between the DBH increment of mid-diameter tree and dominance was significant (P < 0.05). The annual DBH increment of spruce in 1P was lower than that in 4P cloud, while that of Korean pines was opposite.
        Conclusion  There are significant differences in the growth of trees under different diameter classes. Reducing the neighborhood comparison and appropriately increasing the mingling are beneficial to the DBH growth of trees. The competition in different growth stages leads to the difference in the response of different diameter classes to mingling degree and neighborhood comparison. Therefore, different management measures should be taken to adjust and optimize the stand structure to promote the long-term stable development of stand.

       

    /

    返回文章
    返回