摘要
以帽儿山天然软阔叶次生林为研究对象,通过对其前后4期13 a的数据进行分析,探索帽儿山林分结构动态变化规律,为帽儿山天然次生林科学经营管理提供参考依据。结果表明:2007-2020年间直径分布都近似反J形分布,Weibull模型的R2为0.889~0.917,Logistic分布模型的R2为0.982~0.989,拟合效果均较好。林分径阶分布均匀,树种组成复杂,非空间结构指标中除林分密度(24.18~26.54)增加外,树种多样性(0.809~0.755)、林分稳定性(0.96~1.12)、株数密度均为下降。空间结构在13 a期间变化不明显,林分水平分布格局(0.525~0.518)呈现聚集分布、林木竞争为中庸状态(0.504~0.499)、林分混交程度整体为中度混交(0.615~0.640)、林分垂直复杂度下降(0.542~0.526)、林分空间综合指数变化稳定。综上所述,帽儿山天然软阔叶次生林林分结构保持相对稳定且呈现正向演替趋势,未来需对林分进行适当间伐,扩大生长空间,改善生境条件,同时适当补植红松等珍贵树种,提高经济价值,改善林分格局。
Taking natural soft broad leaved secondary forest in Maoershan as the object,we analyzed the data of 4 periods within 13 years and explored the dynamic change law of forest structure in Maoershan,which provides a theoretical basis for the scientific management of natural secondary forest.The results show that the diameter distributions from 2007 to 2020 are all approximate to the inverse J-shape,where the R?of Weibull model varied between 0.889 and 0.917;the R2 of the logistic distribution model from 2007 to 2020 ranged from 0.982 to 0.989;The diameter classes of the stands are even distribution,and the compositions of tree species are complex.In the non-spatial structure index,except for the increases of the stand density(24.18-26.54),the diversities of tree species(0.809-0.755),the stabilities of the stand(0.96-1.12)and the number and densities of trees are all decreased;The spatial structures did not change significantly during the 13 years.The horizontal distribution pattern(0.525-0.518)of the stand showed an aggregated distribution,the forest competition was in the middle(0.504-0.499),the overall mixing degree of the stand was moderate(0.615-0.640),the vertical complexity of the stand decreased(0.542-0.526),and the spatial comprehensive index of the stand changed stably.To sum up,the forest structures of Maoershan natural soft broad leaved secondary forest remain relatively stable and presents a positive succession trend.In the future,stand thinning should be done properly to expand growth space and improve habitat conditions.Precious tree species such as Pinus koraiensis should be properly replanted to increase economic value and improve stand pattern.
作者
齐静
董灵波
刘兆刚
Qi Jing;Dong Lingbo;Liu Zhaogang(Key Laboratory of Ministry of Education on Sustainable Forest Ecosystem Management,College of Forestry,Northeast Forestry University,Harbin Heilongjiang 150040,China)
出处
《西南林业大学学报（自然科学）》
北大核心
2023年第6期97-106,共10页
Journal of Southwest Forestry University：Natural Sciences
基金
国家自然科学基金项目(31700562)资助
黑龙江省头雁创新团队计划项目资助。
关键词
软阔叶次生林
枯损模型
林分结构
变化规律
natural soft broad leaved secondary forest
mortality model
stand structure
change law
