文献类型：期刊文献

中文题名：青海省不同生境下青海云杉胸径生长模型研究

英文题名：Diameter Growth Models of Picea crassifolia from Different Habitats in Qinghai Province

作者：马浩[1] 陈科屹[2] 徐干君[1] 党禹杰[1] 何友均[2] 王建军[2]

第一作者：马浩

机构：[1]国家林业和草原局西北调查规划院,陕西西安710048;[2]中国林业科学研究院林业科技信息研究所,北京100091

年份：2024

卷号：37

期号：1

起止页码：119-129

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心2023】；CSCD:【CSCD2023_2024】；

基金：国家自然科学基金面上项目(31570633)。

语种：中文

中文关键词：胸径生长量;生长规律;单木生长模型;混合效应模型;青海

外文关键词：diameter increment;growth regularity;individual-tree growth model;mixed effect model;Qinghai Province

分类号：S758.5

摘要：[目的]研究不同生境压力下青海云杉的林木胸径生长规律及生长模型,为有效保护、合理经营青海云杉林提供经验模型。[方法]利用青海地区青海云杉的树轮数据,计算单木胸径生长量,分析不同起源、不同坡位条件下胸径生长规律,构建单木胸径生长模型,对比与评价不同模型的拟合优度结果。随后选取基础模型,建立考虑起源和坡位的青海云杉单木胸径混合效应模型,采用全部数据对模型进行检验。[结果]总体来看,青海云杉生长到胸高位置后,单木胸径生长量随着年龄的增加呈现下降后平缓变化趋势;青海云杉天然林、人工林单木生长的速生期分别为29—44 a、29—39 a,连年生长量(CAI)和平均生长量(MAI)均在0.40 cm以上,随后天然林单木CAI和MAI的变化平缓,人工林的变化幅度较大。不同坡位的单木胸径生长趋势具有差异。生长模型结果显示,不同起源、坡位条件下各树种最优胸径生长模型的决定系数(R^(2))均在0.913以上,总体相对误差(TRE)和平均系统误差(MSE)均在±2%以内,平均预估误差(MPE)大多在5%以内,平均百分标准误差(MPSE)在35%以内。以Gompertz模型为基础模型构建的混合效应模型的R^(2)为0.702,拟合效果优于基础模型;检验指标TRE为0.03%,MSE为-0.30%,MPE为4.23%,MPSE为29.54%,较基础模型分别下降89.3%、83.5%、20.6%、15.1%。[结论]不同生境条件下青海云杉的胸径生长规律具有差异,天然林的快速生长期持续时间长;所构建的单木胸径生长混合效应模型,可以用于估算青海省不同生境条件下青海云杉的林木胸径生长量变化。
[Objective]The growth regularity and diameter at breast height(DBH)growth model of Picea crassifolia from different habitats were studied,which will provide empirical models and reference basis for forest protection and management.[Method]Base on the tree-ring data of Picea crassifolia in Qinghai province,the increment of tree DBH was used to analyze tree growth in different habitats.Then,five kinds of individual-tree growth models were constructed,and compared according to the model goodness of fit andindexes.Finally,origin and slope position effects were considered to develop mixed effects models,and the evaluation indices of different models were used.[Result]When trees grew to breast height,the increment of individual trees decreased with age and then changed gently.The fast-growing period of Picea crassifolia natural forests and plantations was 29—44 a and 29—39 a,respectively.The current annual increment of DBH(CAI)and mean annual increment of DBH(MAI)of natural Picea crassifolia were above 0.40 cm.CAI and MAI of of natural forests changed slowly,while the trees growth of plantations had relatively large variation ranges.The trend of DBH increment of Picea crassifolia were different among four slope positions.The results of optimal individual-tree growth models developed along different habitats showed that the determination coefficients(R^(2))were above 0.913,the total relative error(TRE)and the average system error(MSE)were within±2%,the average prediction errors(MPE)were less than 5%mostly,and the average percentage standard errors(MPSE)were less than 35%.Based on the Gompertz model,the R^(2)of mixed effects model was 0.702,the TRE,MSE,MPE and MPSE of mixed effect model were 0.03%,?0.30%,4.23%and 29.54%,respectively,decreased by 89.3%,83.5%,20.6%and 15.1%compared with that of based model.[Conclusion]The growth patterns of Picea crassifolia are different under different habitats.The Picea crassifolia of natural forests have a longer vigorous growing period than that plantations.The mixed effect model of individual-tree growth of DBH considering the different habitats,can be used to estimate the changes of DBH for Picea crassifolia in Qinghai province.