杨桦天然次生林各阶段林分结构差异性分析及经营迫切性评价

杨陈; 孙鹤嘉; 郭忠诚; 刘强

doi:10.12302/j.issn.1000-2006.202404017

杨陈, 孙鹤嘉, 郭忠诚, 刘强

南京林业大学学报（自然科学版） ›› 2025, Vol. 49 ›› Issue (6) : 47-54.

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南京林业大学学报（自然科学版） ›› 2025, Vol. 49 ›› Issue (6) : 47-54. DOI: 10.12302/j.issn.1000-2006.202404017

专题报道Ⅰ: 第十四届海峡两岸森林经理研讨会专题（执行主编李凤日曹林）

杨桦天然次生林各阶段林分结构差异性分析及经营迫切性评价

作者信息 +

Differences of stand structures and evaluation of management urgency for various management stages of natural secondary poplar-birch forest

Author information +

文章历史 +

摘要

【目的】森林结构决定其功能,天然次生林是由原始林受干扰后形成的1种退化森林生态系统。本研究探究杨桦天然次生林的结构特征,并阐明其驱动因素,为促进天然次生林质量提升和生态功能恢复提供依据。【方法】对比分析不同发育阶段杨桦天然次生林林分空间结构参数和综合评价指数(FSS)的差异性,基于经营迫切性评价体系评估围场县境内杨桦天然次生林各发育阶段的经营迫切性等级。【结果】①随着杨桦天然次生林的发育,FSS逐步提高,经过抚育的林分FSS平均提高0.13。②未抚育杨桦天然次生林发育前期的林分经营迫切性评价指数均在0.60以上,林分远离健康稳定森林的特征,必须经营;发育中期,林分经营迫切性评价指数为0.40,十分需要经营;发育后期,林分经营迫切性评价指数为0.30,可适度经营。③经过抚育后的杨桦天然次生林,在各发育阶段的林分经营迫切性评价指数均低于抚育前,且基于8指标体系的经营迫切性指数普遍低于11指标体系的计算结果。【结论】随着杨桦天然次生林林分发育阶段的推进,林分结构逐渐优化、经营迫切性显著降低。研究结果可为集成围场地区杨桦天然次生林经营技术体系奠定基础。

Abstract

【Objective】The forest structure determines its function. Natural secondary forest is a type of degraded forest ecosystem formed after the interference of primary forests. This study aims to explore the structural characteristics of natural secondary poplar-birch forests and clarify their driving factors, providing a basis for promoting the quality improvement of natural forests and the restoration of ecological functions.【Method】The differences in spatial structure parameters and comprehensive evaluation index (FSS) of natural secondary poplar-birch forests at different development stages were compared and analyzed. Based on the management urgency evaluation system, the management urgency level of natural secondary poplar-birch forests at different development stages in Weichang County was evaluated.【Result】(1)As the poplar-birch secondary forests develop, the FSS value gradually increases, with an average improvement of 0.13 in the FSS of managed stands. (2)The urgency evaluation index of stand management in the early stage of natural secondary forest of untended poplar and birch was above 0.60, and the stand was far away from the characteristics of healthy and stable forest, so it must be managed. In the middle stage of development, the urgency evaluation index of forest management was about 0.40, which was very necessary for management. In the late stage of development, the urgency evaluation index of forest management was about 0.30, which could be moderately managed.(3)After tending, the evaluation indices of forest management urgency in each development stage of poplar-birch natural secondary forest was lower than that before tending, and the management urgency indices based on the eight-index system was generally lower than that of the 11 indeices system.【Conclusion】With the advancement of the developmental stages of the poplar-birch secondary forest stands, the stand structure gradually optimizes, and the urgency for management significantly decreases. The results of this study can lay the foundation for integrating the management technical system of natural secondary poplar-birch forests in the Weichang region.

导出引用

杨陈, 孙鹤嘉, 郭忠诚, 等. 杨桦天然次生林各阶段林分结构差异性分析及经营迫切性评价[J]. 南京林业大学学报（自然科学版）. 2025, 49(6): 47-54 https://doi.org/10.12302/j.issn.1000-2006.202404017

YANG Chen, SUN Hejia, GUO Zhongcheng, et al. Differences of stand structures and evaluation of management urgency for various management stages of natural secondary poplar-birch forest[J]. Journal of Nanjing Forestry University (Natural Sciences Edition）. 2025, 49(6): 47-54 https://doi.org/10.12302/j.issn.1000-2006.202404017

中图分类号： S718

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