北京林业大学学报2024，Vol.46Issue(12)：21-29,9.DOI:10.12171/j.1000-1522.20240168
基于蓄积潜在生产力的小兴安岭阔叶混交林立地质量评价
Site quality evaluation of broadleaved mixed forest in Xiaoxing'an Mountains of northeastern China based on volume potential productivity
摘要
Abstract
[Objective]Site quality evaluation is an important foundation for forest management planning and decision-making.This article introduces the potential productivity of stand volume by establishing a stand volume growth model to evaluate the site quality of broadleaved mixed forest in the Xiaoxing'an Mountains of northeastern China,providing a scientific basis for predicting forest growth and harvest,forest management planning,and sustainable management in the region.[Method]Using data from the two consecutive inventory periods of the Xiaoxing'an Mountains broadleaved mixed forest in Heilongjiang Province from 2010 to 2015,a model for average tree height and volume growth of the forest stand was established.Site levels were classified,and potential productivity of each site level for broadleaved mixed forest stands was calculated.We evaluated the actual condition and potential improvement space of the current aged stand based on the difference between actual productivity of the forest and its potential productivity for accumulation.[Result](1)The fitting effect of volume growth model of broadleaved mixed forest in the Xiaoxing'an Mountains was good,and the range of potential productivity at the baseline age of forest was between 3.87-6.10 m3/(ha·year).The average improvement space of broadleaved mixed forest ranged from 50.78%to 62.97%,and gradually increased with decrease of site level.(2)The potential productivity of broadleaved mixed forest in Xiaoxing'an Mountains gradually decreased with increase of stand age,and eventually tended to flatten out.The difference between realized productivity and the potential productivity gradually decreased with increase of stand age.(3)The potential productivity and realized productivity of each age group showed a decreasing trend with decrease of site grade.Forests with moderate site quality accounted for 77.24%of total sample size,and potential productivity of each site grade was always greater than the realized productivity.[Conclusion]The potential productivity of stand volume can serve as an indicator for site quality evaluation of broadleaved mixed forest in the Xiaoxing'an Mountains.For the broadleaved mixed forest in Xiaoxing'an Mountains,stands at the initial stage of development within various site classes exhibit greater potential productivity of stand volume compared with those nearing maturity,and the potential for improvement in stand productivity is also larger.As site quality decreases,the scope for stand improvement gradually expands.Therefore,differentiated management measures should be adopted based on stand development stage and site conditions,with emphasis on stands of medium site quality.Priority should be given to tending of middle-aged and young forests to enhance overall stand productivity.关键词
立地质量评价/潜在生产力/现实生产力/阔叶混交林Key words
site quality evaluation/potential productivity/realized productivity/broadleaved mixed forest分类
农业科技引用本文复制引用
周甲敏,刘兆刚,董灵波..基于蓄积潜在生产力的小兴安岭阔叶混交林立地质量评价[J].北京林业大学学报,2024,46(12):21-29,9.基金项目
"十四五"国家重点研发计划(2022YFD2200502). （2022YFD2200502）
