| 摘要: |
| 【 目的】探讨人工林稳定性评价的指标体系和方法，提出人工林稳定性提升建议和对策，为人工林可 持续管理提供科学依据。【 方法】以塞罕坝机械林场人工林为例，分析林分现状，借鉴最优林分状态 π 值法则，从林分的结构、活力、森林火灾风险及病虫害风险等方面选择指标构建人工林稳定性评价指标体系，采用单位圆法评价林分 的稳定性。【 结果】塞罕坝人工林树种组成单一，林层结构简单，多为单层林，健康林木比例较高，直径分布呈近似正 态分布或多峰态分布。北曼甸分场马达窝铺和千层板分场裤裆沟林分的分布格局为随机分布，其余均为均匀分布；三道河口分场窄道子和千层板分场头道沟近熟林林分的密度较低，其他林分密度适中；林分天然更新只有北曼甸分场二台子和冰郎沟林分达到了中等及以上标准，其他林分均更新不良；研究林分的火灾风险均较高。塞罕坝人工林稳定性 （SAF）整体较差，8个林分中千层板分场裤裆沟、北曼甸分场二台子和马达窝铺林分的稳定性一般，其中北曼甸分场 马达窝铺林分的稳定性最高，SAF值为0.433；三道河口分场 2314-947、千层板分场头道沟中龄林和北曼甸分场冰郎 沟林分的稳定性评价值在［0.20，0.35），稳定性较差；三道河口分场窄道子和千层板分场头道沟近熟林林分的稳定性最差，SAF值仅为0.188和0.182。【 结论】基于林分现状的人工林稳定性评价指标体系和方法可表达林分现实状态 特征的差异，指标计算简便，可操作性强，稳定性评价结果清晰、直观，可指导制定人工林稳定性提升经营策略。 |
| 关键词: 人工林 林分现状 稳定性评价 经营策略 塞罕坝 |
| DOI：10. 13207/j. jnwafu. 2026. 08. 007 |
| 分类号: |
| 基金项目:中央级公益性科研院所基本科研业务费专项（CAFYBB2022ZB00103）；国家自然科学基金面上项目（32171780） |
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| A stability evaluation method for plantations based on the current stand status—— a case study of Saihanba Mechanical Forest Farm |
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YIN Zheng, Sarina, CHEN Dongsheng, ZHAO Zhonghua
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State Key Laboratory of Efficient Production of Forest Resources，Key Laboratory of Tree Breeding and Cultivation of National Forestry and Grassland Administration，Research Institute of Forestry CAF，Beijing 100091，China
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| Abstract: |
| 【 Objective】The study aimed to establish an indicator system and methodology for evaluating plantation stability，propose recommendations and strategies for enhancing stability，thereby providing a basis for the sustainable management of plantations.【Method】Through a case study of the plantations in Saihanba Mechanical Forest Farm，the current stand status were analyzed. Guided by the rule of π value for optimal stand status，an indicator system for evaluating plantation stability was constructed by selecting key indicators related to stand structure，vitality，forest fire risk，and pest and disease risk. The unit circle method was finally used to evaluate stand stability.【Result】The plantations in Saihanba were characterized by a monospecific composition and a simplified predominantly single-layered structure. They exhibited a relatively high proportion of healthy trees，with the diameter distributions approximating a normal or multimodal pattern. Regarding spatial distribution，the spatial distribution pattern of stands in Madawopu（Beimandian sub-farm） and Kudanggou（Qianceng-ban sub-farm） was random，while others were uniformly distributed. The stand density was relatively low in Zhaidaozi（Sandaohekou sub-farm）and the near-mature forests in Toudaogou（Qiancengban sub-farm） whereas other stands exhibited moderate density. Natural regeneration met moderate or higher standards only in Ertaizi and Binglanggou（both in Beimandian sub-farm），with all other stands showing poor regeneration. Furthermore，all studied stands presented a relatively high fire risk. Overall，the stand stability of Saihanba plantations was poor. Among the eight stands，those in Kudanggou（Qiancengban sub-farm），Ertaizi，and Madawopu（both in Beimandian sub-farm） demonstrated moderate stability. The stand in Madawopu exhibited the highest stability，with a SAF value of 0. 433. Stands in site 2314-947（Sandaohekou sub-farm），the middle-aged forest in Toudao-gou（Qiancengban sub-farm），and Binglanggou（Beimandian sub-farm） had stability evaluation values within the range of［ 0.20，0.35），indicating poor stability. The stands in Zhaidaozi（Sandaohekou sub-farm） and the near-mature forests in Toudaogou（Qiancengban sub-farm） exhibited the poorest stability，with SAF values of 0.188 and 0.182.【Conclusion】The indicator system for stability evaluation and methodology developed based on the current stand status can effectively express differences in stand characteristics. These indicators are straightforward to calculate and highly practical，yielding stability evaluation results that are clear and intuitive.
This approach can guide the formulation of management strategies to enhance plantation stability. |
| Key words: plantation current stand status stability evaluation management strategy Saihanba |
