东北林业大学学报2026，Vol.54Issue(9)：60-68,78,10.
大兴安岭火后不同恢复方式森林细根-土壤C、N、P化学计量特征
Stoichiometric Characteristics of Fine Root-Soil C,N and P in Forests under Different Restoration Modes after Fire Disturbance in the Greater Khingan Mountains
摘要
Abstract
To explore the effects of restoration patterns on stoichiometric characteristics of arbor fine roots and soil after fire dis-turbance,we selected three forest types in severely burned areas of the Greater Khingan Mountains as research objects,in-cluding naturally restored secondary Betula platyphylla forest,artificially planted Larix gmelinii forest,and unburned pri-mary L.gmelinii forest.The mass fractions of carbon(C),nitrogen(N)and phosphorus(P),stoichiometric ratios and their correlations in arbor fine roots and soil were analyzed.The results showed that:(1)There were significant differ-ences in total C,total N and total P mass fractions of fine roots among the three forest stands,with the secondary B.platyphylla forest having the highest total carbon and total nitrogen content.The N∶P ratios of fine roots in all three forests were lower than 14,indicating that their growth was restricted by nitrogen.(2)The mass fractions of soil total C,total N and total P in primary L.gmelinii forest were significantly higher than those in the other two forests(P<0.05).The soil C∶N ratios of all forest stands were higher than the national average level,while soil N∶P ratios were relatively lower.(3)Fine root stoichiometric characteristics were closely correlated with soil stoichiometry,yet the correlation patterns var-ied among forest types.The fine root N∶P ratio changed synchronously with soil N∶P ratio in secondary B.platyphylla forest,while fine root C∶P ratios were significantly correlated with soil N∶P ratios in the two L.gmelinii forests.(4)Overall,the secondary B.platyphylla forest had the lowest C∶N ratio and higher fine root turnover rate,the artificial L.gmelinii forest presented low nitrogen cycling efficiency,the primary L.gmelinii forest possessed higher soil total C con-tent,soil C∶N ratio and fine root C∶N ratio,reflecting its low nutrient turnover rate and slow organic matter decomposi-tion rate.关键词
火烧迹地/森林恢复/细根/土壤/生态化学计量Key words
Burned area/Forest restoration/Fine roots/Soil/Ecological stoichiometry分类
农业科技引用本文复制引用
王庆华,夏晨,蔡玉山,段亮亮..大兴安岭火后不同恢复方式森林细根-土壤C、N、P化学计量特征[J].东北林业大学学报,2026,54(9):60-68,78,10.基金项目
国家重点研发计划项目子课题(2023YFE0112805-04) （2023YFE0112805-04）
黑龙江省重点研发计划项目(JD24C002). （JD24C002）
