湖南省楠木次生林收获表的研制  

Establishmentof the yieldtables of Phoebe zhennan secondary forest in Hunan province

作　　者：姜兴艳 曾思齐[2] 石振威 龚召松 JIANG Xingyan;ZENG Siqi;SHI Zhenwei;GONG Zhaosong(Forestry Bureau of Xixiu District of Anshun,Anshun 561000,Guizhou,China;Central South University of Forestry&Technology,Changsha 410004,Hunan,China;Sichuan Forestry Survey and Planning Institute,Chengdu 610081,Sichuan,China)

机构地区：[1]安顺市西秀区林业局,贵州安顺561000 [2]中南林业科技大学,湖南长沙410004 [3]四川省林业勘察设计研究院,四川成都610081

出　　处：《中南林业科技大学学报》2020年第11期55-64,共10页Journal of Central South University of Forestry & Technology

基　　金：国家林业公益性行业专项(201504301)。

摘　　要：【目的】利用湖南省森林资源连续清查样地中楠木数据,编制楠木次生林主要收获表,为林分生长收获预估、鉴定经营效果及制定营林措施提供科学依据。【方法】采用主要生长方程对楠木次生林平均胸径、断面积生长规律进行拟合,以计算平均提升系数的方法将现实林分提升至标准林分状态,利用Reineke模型为基础,加入林分类型效应构建湖南楠木次生林自稀疏混合效应模型,对比Reineke模型和自稀疏混合效应模型拟合结果,筛选拟合效果较好的模型来反映林分自稀疏规律。根据林分各调查因子间相互关系,编制出湖南楠木次生林现实收获表、正常收获表。【结果】修正Weibull方程对各指数级林分平均胸径生长规律的拟合效果最好,12、15指数级林分断面生长规律拟合效果最好的分别是修正Weibull方程和Logistic方程,模型χ2检验显示各指数级林分平均胸径、断面积均有χ2<χ^20.05,加入林分类型效应的自稀疏混合效应模型AIC、BIC值均比基础模型小,残差分布范围较小且相对均匀,相关系数R2由基础模型的0.681提升为0.796,模型拟合效果较好。【结论】生长方程拟合理论值与林木实际生长情况相符,自稀疏混合效应模型可很好地反映林分自稀疏规律,所编制的楠木次生林收获表精度较高,可为科学制定楠木次生林经营方案提供技术支持。【Objective】Primary yieldtables of Phoebe zhennan secondary forest were established based on the data of national forest inventory stands inHunan province,which provided scientific basis for estimating stand growth and harvest,identifying management effect and formulating forest management measures.【Method】The growth rule of average DBH and basal area of Phoebe zhennan forest was fitted by the main growth equation,and the actual stand was upgraded to the standard stand state by calculating the average lifting coefficient.Based on Reineke model,the self-sparse mixed effect model of secondary forest was constructed by adding stand type for randm effect,by comparing the fitting results of Reineke model and self-thinning mixed effect model,the better fitting models were selected to reflect the self-thinning law of stand.The real yield-table and normal yield-table table of Phoebe zhennan secondary forest were established according to the relationship among the investigation factors.【Result】The modified Weibull equation performed best on the average DBH growth law of each site index,and the best fitting results of basal area of 12 and 15 site index are modified Weibull equation and Logistic equation,χ2-test results of the model showed thatχ2<χ^20.05 in all forest factors of each site index,The AIC and BIC values of mixed effect model with forest classification effect were smaller than those of the basic model,and the residual distribution was smaller and relatively uniform.The correlation coefficient(R2)was increased from 0.681 of the basic model to 0.796,and the fitting effect of the model was better.【Conclusion】There is no difference between the theoretical value of model fitting and the actual growth,the self-thinning mixed effect model can well reflect the self-thinning law of stand.The yield-tables has high precision,can provide technical support for scientific formulation of management plan of Phoebe zhennan secondary forest.

关 键 词：楠木 混合效应模型 自然稀疏 收获表 

分 类 号：S792.24[农业科学—林木遗传育种]