北京林业大学学报2026，Vol.48Issue(2)：132-140,9.DOI:10.12171/j.1000-1522.20250345
树种混交对油松人工林化学计量特征及养分再吸收效率的影响
Effects of tree species mixing on stoichiometric characteristics and nutrient resorption efficiency of Pinus tabuliformis plantations
摘要
Abstract
[Objective]This study aimed to explore the effects of tree species mixing on stoichiometric characteristics,nutrient resorption efficiency,and homeostasis of leaves,litter,and soil in Pinus tabuliformis plantations in mountainous areas of Beijing,northern China to provide a scientific basis for sustainable management of P.tabuliformis plantations.[Method]Pure P.tabuliformis plantation,P.tabuliformis+Tilia mandshurica mixed plantation(PT),P.tabuliformis+Quercus mongolica mixed plantation(PQ),and P.tabuliformis+Prunus davidiana+Prunus sibirica mixed plantation(PR)were measured for C,N,and P contents and stoichiometry in leaves,litter and soil.Nutrient resorption efficiency and homeostasis were assessed using allometric growth and resorption efficiency models.[Result]The PQ plantation showed optimal nutrient status,with significantly higher leaf N content and N∶P,as well as elevated soil C,N,C∶P and N∶P.The PT plantation had the highest leaf C∶N and C∶P,indicating a conservative nutrient strategy.Tree species mixing generally had higher litter C,N and N∶P than pure stands,suggesting enhanced decomposition and nutrient release potential.PQ and PT exhibited the highest N and P resorption efficiency,respectively,both exceeding pure P.tabuliformis stand.All four stands maintained strong P homeostasis,with leaf P content unaffected by soil P variation.[Conclusion]Compared with pure stand,tree species mixing,particularly the PQ plantations significantly enhance nutrient status,soil fertility and resorption efficiency,providing an optimal model for transforming low-efficiency plantations in Beijing mountainous areas.Prioritizing ecologically complementary species in mixing is recommended to improve nutrient cycling and ecosystem stability.关键词
树种混交/化学计量/再吸收效率/油松Key words
tree species mixing/stoichiometry/resorption efficiency/Pinus tabuliformis分类
农业科技引用本文复制引用
杨浩,姜俊..树种混交对油松人工林化学计量特征及养分再吸收效率的影响[J].北京林业大学学报,2026,48(2):132-140,9.基金项目
2025年推进北京园林绿化高质量发展科技创新系列专项(20250730). （20250730）
