山西农业大学学报（自然科学版）2025，Vol.45Issue(2)：90-101,12.DOI:10.13842/j.cnki.issn1671-8151.202404029
冀北山区樟子松生物量分配特征及模型研建
Biomass allocation characteristics and model development of Pinus sylvestris var.mongolica in northern Hebei mountainous area
摘要
Abstract
[Objective]Pinus sylvestris var.mongolica,known for its drought resistance to poor soil conditions,has become a key species in the construction of the'Three North'Shelterbelt Program and is widely used in the sandy areas of northern He-bei.The purpose of this study was to explore the biomass distribution patterns of different organs of P.sylvestris in the Saihan-ba area of Hebei Province and to construct an optimal biomass prediction model.[Methods]The study focused on the pine trees aged 12 to 46 years from the Saihanba Mechanized Forest Farm in Hebei Province.Based on biomass data from 34 sample trees,the allocation patterns of biomass in different organs was analyzed.Biomass models for various organs were constructed using DBH,tree height,and height-to-diameter ratio as independent variables.The fitting performance of the models was eval-uated using the adjusted coefficient(Ra2)and root mean square error(RMSE),and the predictive performance was assessed using mean error(ME)and mean absolute error(MAE).[Results](1)Among the organs of pine trees,the trunk had the highest biomass proportion(48.86%～65.61%),while the leaves and roots had lower proportions at 10.58%and 14.65%,respectively.(2)The proportion of trunk biomass increased with age,DBH,and tree height,with the most significant change observed with DBH,increasing from 30%to 76%.The proportions of branch and leaf biomass decreased with the increase of age,DBH and tree height.The root biomass allocation remained relatively stable,with a variation of less than 15%.(3)The optimal model for branch biomass was an exponential equation with D2H as the variable,achieving an Ra2 of 0.87.For the stems,leaves,and roots,the optimal models were exponential equations with DaHb as the variable,with Ra2 values exceeding 0.79.The stem model achieved an Ra2 of 0.99.The compatible biomass model achieved an Ra2 of 0.95.[Conclusion]The biomass allocation of stem,branches,and leaves of P.sylvestris in the northern Hebei region varied significantly with tree age.Exponential models with DaHb as the variable were effective for estimating the total and organ-specific biomass of P.sylves-tris.However,the compatible model provided a good fit while maintaining the relationship between the whole tree and its or-gans.This study enhanced the biomass model system of P.sylvestris in the mountainous areas of northern Hebei Province and laid a theoretical foundation for the sustainable management of P.sylvestris.关键词
樟子松/器官生物量/分配比例/异速生长模型/相容性生物量模型Key words
Pinus.sylvestris/Organ biomass/Allocation ratio/Allometric growth model/Compatible biomass model分类
农业科技引用本文复制引用
籍翠莹,孙鹤嘉,周颖,钱甲龙,付立华,刘强..冀北山区樟子松生物量分配特征及模型研建[J].山西农业大学学报（自然科学版）,2025,45(2):90-101,12.基金项目
河北省重点研发计划项目-乡村振兴技术创新专项(22326807D) （22326807D）
河北农业大学引进人才科研专项(YJ201942) （YJ201942）
