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中亚热带森林林分质量影响因子研究
邓小玲1, 宋玉龙2
1.肇庆市国有新岗林场;2.广东怀集大稠顶省级自然保护区管理处
摘要:
关键林分质量影响因子能够客观反映森林资源真实状况, 从而为森林质量精准提升和可持续经 营管理提供依据。 以典型中亚热带地区肇庆市国有新岗林场范围内约 1 100 个小班为研究对象, 选取 11 类指标进行分析, 运用因子分析法研究林分质量指标之间的相关性, 并对关键林分质量影响因子进行评 估。 结果表明: 平均株高与平均胸径呈极强相关关系, 公顷蓄积量、 平均胸径、 平均株高与郁闭度均呈强 相关关系, 平均胸径、 平均株高与公顷蓄积量呈强相关关系; 森林健康度与林地质量等级呈负相关关系; 树种结构与 11 个指标均呈负相关关系, 其在林分质量评价的过程中影响因素较小; 研究区域内的林分质 量评价呈高度空间异质性, 北部区域的林分质量优于南部区域, 南坡林分质量多优于北坡; 受人为活动等 因素的干扰, 林场边缘区域林分质量较差, 无林地周边小班林分质量分类多为中, 需要采取积极经营措 施, 改善林分状况, 逐步达到良或优的等级。
关键词:  林分质量  因子分析法  空间分布
DOI:
分类号:
基金项目:省级财政专项资金 (生态林业建设) 项目。
Study on the Influencing Factors of the Key Stand Quality of Forest in the Middle Subtropical Region of China
Deng Xiaoling1, Song Yulong2
1.State-owned Xingang Forest Farm in Zhaoqing City;2.Guangdong Huaiji Dachouding Provincial Nature Reserve Management Office
Abstract:
The influencing factors of the key stand quality of forestcan objectively reflect the real condition of forest resources, and provide a basis for the precise improvement of forest quality and sustainable operation and management. Taking the forest land in the State-owned Xingang Forest Farm of Zhaoqing city, a middle subtropical region of China, as the the research object, 11 types of indicators were selected for analysis. The correlation between forest quality indicators was studied by factor analysis, and the key forest quality influencing factors were evaluated. The results showed that there was a strong correlation between average plant height and average DBH, and there was a strong correlation between volume per hectare, average DBH, average plant height, and canopy density, and there was a strong correlation between average DBH, average plant height, and volume per hectare. There was a negative correlation between forest health degree and forest land quality grade. Tree species structure was negatively correlated with 11 indexes, and its influencing factors were small in the process of stand quality evaluation. The stand quality evaluation in the study area showed high spatial hetero- geneity. The stand quality in the northern region was better than that in the southern region, and the stand quality classification in the southern slope was mostly excellent. Affected by human activities and other factors, the quality of forest stands in the edge area of forest farms is poor, and the surrounding areas of no forest land are mostly medium. Active management measures need to be taken to improve the standing status and gradually reach a good or excellent level.
Key words:  Stand quality  factor analysis  spatial distribution