| 河北省主要树种单木和林分生长率模型研建 |
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| 引用本文： | 曾伟生,曹迎春,陈新云,赵连清.河北省主要树种单木和林分生长率模型研建[J].林业资源管理,2020(1):30-37. |
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| 作者姓名： | 曾伟生 曹迎春 陈新云 赵连清 |
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| 作者单位： | 国家林业和草原局调查规划设计院,北京100714;河北省林业调查规划设计院,石家庄050051 |
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| 基金项目： | 国家自然科学基金项目(31770676)。 |
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| 摘 要： | 利用第六次至第九次全国森林资源清查河北省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18个树种组的单木胸径生长率和材积生长率模型,以及12个树种组的林分材积生长率模型。结果表明,单木生长率模型的平均预估误差(MPE)基本都在3%以内,而平均百分标准误差(MPSE)、胸径生长率模型大都在10%以内,材积生长率模型大都在20%左右;林分生长率模型的平均预估误差(MPE)基本都在5%以内,平均百分标准误差(MPSE)大都在25%以内。所建模型可为河北省开展森林资源年度更新提供技术支撑。
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| 关 键 词： | 胸径生长率 材积生长率 单木模型 林分模型 河北 |
Developing Tree-level and Stand-level Growth Rate Models for Major Tree Species in Hebei Province |
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| ZENG Weisheng,CAO Yingchun,CHEN Xinyun,ZHAO Lianqing.Developing Tree-level and Stand-level Growth Rate Models for Major Tree Species in Hebei Province[J].Forest Resources Management,2020(1):30-37. |
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| Authors: | ZENG Weisheng CAO Yingchun CHEN Xinyun ZHAO Lianqing |
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| Institution: | (Academy of Forest and Grassland Inventory and Planning,National Forestry and Grassland Administration,Beijing 100714;Hebei Forest Inventory and Planning Institute,Shijiazhuang 050051) |
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| Abstract: | Based on the data of permanent plots measured in 2001,2006,2011,2016 in Hebei province from the 6th to 9th national forest inventories of China,tree-level dbh(diameter at breast height)growth rate and volume growth rate models for 18 tree species and stand-level volume growth rate models for 12 tree species group were developed using nonlinear regression method.The results show that the MPEs(mean prediction errors)of the tree-level models are almost less than 3%,and the MPSEs(mean percent standard errors)are almost less than 10% for dbh growth rate models and less than 20% for volume growth rate models.For stand-level volume growth rate models,the MPEs are almost less than 5%,and the MPSEs are almost less than 25%.The models developed in this study can provide technical basis for implementing annual updating of forest resource data in Hebei province. |
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| Keywords: | growth rate of diameter growth rate of volume tree-level model stand-level model Hebei |
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