北京市主要树种单木和林分生长率模型研建  

Developing Tree-and Stand-Level Growth Rate Models for Major Tree Species in Beijing

作　　者：曾伟生 杨学云 陈新云 ZENG Weisheng;YANG Xueyun;CHEN Xinyun(Academy of Forestry Inventory and Planning,National Forestry and Grassland Administration,Beijing 100714,China)

机构地区：[1]国家林业和草原局林草调查规划院,北京100714

出　　处：《中南林业调查规划》2022年第1期1-8,13,共9页Central South Forest Inventory and Planning

基　　金：国家财政专项“森林资源监测与评价”(2130207)。

摘　　要：利用第六次至第九次全国森林资源清查北京市2001,2006,2011,2016年4个年度的固定样地调查数据,采用非线性回归估计方法,建立了13个树种组的单木胸径生长率和材积生长率模型,以及10个优势树种组的林分蓄积生长率模型,并对比了林分生长过程模型与林分生长率模型的预估效果,还分析了起源对生长率模型的影响。结果表明:(1)单木生长率模型的平均预估误差全部在3%以内,而平均百分标准误差,胸径生长率模型大都在10%以内,材积生长率模型大都在30%以内;(2)林分蓄积生长率模型的平均预估误差大部分在5%以内,最大的也未超出10%,而平均百分标准误差基本上在20%左右,最大的也未超出35%;(3)基于森林资源清查数据建立的生长过程模型,其效果不如生长率模型,对杨树以外的其他软阔林分类型,其人工林的蓄积生长率要显著大于天然林。以此方法所建模型可为北京市开展森林资源年度监测评价提供技术支撑。Based on the data of permanent plots measured in 2001, 2006, 2011, 2016 in Beijing from the 6;to 9;national forest inventories of China, tree-level DBH(diameter at breast height) growth rate and volume growth rate models for 13 tree species groups and stand-level volume growth rate models for 10 dominant tree specie groups were developed at first using nonlinear regression method;the prediction performances of growth process models and growth rate models were compared;and the impact of stand origin to growth rate model was analyzed. The results show:(1) For tree-level growth rate models, the MPEs(mean prediction errors) are all less than 3%, and the MPSEs(mean percent standard errors) are most less than 10% for dbh growth rate models and most less than 30% for volume growth rate models;(2) For stand-level volume growth rate models, the MPEs are most less than 5%, and the largest is less than 10%;and the MPSEs are about 20%, and the largest is less than 35%;(3) The performance of growth process models based on national forest inventory data is not as good as that of growth rate models;and the volume growth rate of plantations is significantly larger than that of natural forests for the softwood broadleaved stands except poplar. The models developed in this study can provide technical basis for implementing annual updating of forest resource data in Beijing.

关 键 词：胸径生长率 材积生长率 单木模型 林分模型 北京 

分 类 号：S757.3[农业科学—森林经理学]