| 摘要: |
| 林分空间结构是林分质量评价的重要指标之一, 合理的林分空间结构是森林健康稳定和多功
能作用的基础。 为探究不同干扰强度对林分空间结构的影响, 文章以流溪河国家森林公园的天然次生阔
叶混交林为研究对象, 以郁闭度为依据划分不同的干扰等级, 分析不同干扰强度下的混交度、 大小比数
和角尺度的特征及变化规律, 并运用林分空间结构指数和林分空间结构距离对林分空间结构进行综合定
量评价。 结果表明: 不同强度的干扰对林分空间结构参数有影响, 其中弱度干扰时标准地混交度最大、
大小比数最小, 干扰强度的增大或减小, 其混交度变小、 而大小比数变大, 强度干扰时标准地混交度最
小、 大小比数最大; 角尺度未随干扰强度的变化产生规律性变化。 干扰强度影响林分空间结构, 当林分
受到弱度干扰时, 林分空间结构最优, 林分受到强度干扰时, 林分空间结构最差。 因此, 在进行林相改
造和森林抚育过程中, 可适度对林分进行干扰, 使其郁闭度保持在 0. 77~0. 83, 这样有利于林分空间结构
的优化。 |
| 关键词: 干扰强度 林分空间结构 林分空间结构指数 林分空间结构距离 流溪河国家森林公园 |
| DOI： |
| 分类号: |
| 基金项目:广东省林业科技创新重点项目 (2021KJCX009)。 |
|
| Study on the Spatial Structure of Stand with Different Disturbance Intensities in Liuxihe National Forest Park |
|
lei min1, hu lei2, li sheng qiang3, xie zhuo hong4, liu li jie4, liu ping5
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1.Guangdong Senlin Greening Limited Company;2.Beijing Forestry University;3.Guangzhou Liuxihe Forest Farm;4.Guangdong Lingnanyuan Exploration and Design Co. Ltd.;5.South China Agricultural University
|
| Abstract: |
| Stand spatial structure is one of the important indexes of stand quality evaluation. Reasonable
stand spatial structure is the basis of forest health, stability, and multifunctional function. To explore the effects
of different disturbance intensities on the spatial structure of the stand. In this paper, the natural secondary
broad-leaved mixed forest in Liuxihe National Forest Park was taken as the research object. Different disturbance levels were divided according to canopy degree. The characteristics and change laws of mingling, neighborhood
comparison, and neighborhood patterns under different interference intensities were analyzed. And forest spatial
structure index and forest spatial structure distance were used to comprehensively and quantitatively evaluate the
stand spatial structure. The results showed that the interference of different intensities affected the spatial structure
parameters of the stand. The mingling of the standard plot was the largest and the neighborhood comparison of
the standard plot was the smallest at weak interference. The increase or decrease of interference intensity, and
mingling of the standard plot became smaller, while the neighborhood comparison of the standard plot became
larger. The mingling of standard plot was the smallest and the neighborhood comparison of the standard plot was
the largest at intensity interference. Neighborhood patterns did not change regularly with the variation of interference intensity. Interference intensity affected the spatial structure of the stand. When the stand was disturbed by
weak interference, the spatial structure of the stand was the best, while when the stand was disturbed by intensity interference, the spatial structure of the stand was the worst. Therefore, the stand can be moderately disturbed to keep its canopy density at 0. 77 - 0. 83, in the process of forest transformation and forest tending,
which is beneficial to optimize the spatial structure of the stand. |
| Key words: disturbance intensities stand spatial structure forest spatial structure index forest spatial structure distance Liuxihe National Forest Park |
