林业科学2026，Vol.62Issue(1)：57-66,10.DOI:10.11707/j.1001-7488.LYKX20250043
油松、栓皮栎幼苗种内和种间竞争对根系结构与非结构性碳水化合物的影响
Effects of Intraspecific and Interspecific Competition of Quercus variabilis and Pinus tabuliformis Seedlings on Root Structure and Non-Structural Carbohydrates
摘要
Abstract
[Objective]This study aims to compare the plasticity of root system structure and the seasonal variations of non-structure carbon in interspecific and intraspecific competition between Q.variabilis and P.tabuliformis,and elucidate the competitive mechanism in forest succession,so as to provide theoretical basis for the efficient cultivation of oak-pine mixed forests.[Method]Two-year-old seedlings of Q.variabilis and P.tabuliformis were used as research objects,and three competition scenarios of P.tabuliformis–P.tabuliformis,P.tabuliformis–Q.variabilis,and Q.variabilis–Q.variabilis were set up.Root system structural traits and non-structure carbon were measured,and the two-factor analysis of variance was used to explore the effects of competition scenarios and seasons on root system structure and non-structure carbon were explored using.[Result]Compared with intraspecific competition,the interspecific competition of P.tabuliformis–Q.variabilis inhibited the root length,root surface area,fine roots,and total root volume of P.tabuliformis seedlings,while the interspecific competition promoted the coarse root volume of Q.variabilis seedlings.The soluble sugar,starch and non-structural carbohydrate contents in fine roots and whole plant of P.tabuliformis seedlings under the P.tabuliformis–Q.variabilis interspecific competition were significantly lower than those in the P.tabuliformis intraspecific competition,while the above-mentioned indicators of Q.variabilis seedlings in the interspecific competition were basically higher than those in the Q.variabilis intraspecific competition,and the differences were even more pronounced at the end of August.[Conclusion]Q.variabilis seedlings shows stronger adaptability and competitive advantage in P.tabuliformis–Q.variabilis interspecific competition.Both species can adjust their root system structure and non-structure carbon levels seasonally to optimize their competitive strategies.These findings help to understand the succession process of P.tabuliformis–Q.variabilis mixed forests and provide theoretic basis for efficient cultivation of P.tabuliformis–Q.variabilis mixed forests.关键词
树种竞争/根系结构/可塑性/非结构碳/季节动态Key words
species competition/root structure/plasticity/non-structure carbon/seasonal dynamics分类
农业科技引用本文复制引用
Yuan Xin,Zhang Mengfan,Wang Jiaxi,Shao Zhanhai,Wang Ying,Liu Yong,Wan Fangfang,Gao Faming,Li Guolei..油松、栓皮栎幼苗种内和种间竞争对根系结构与非结构性碳水化合物的影响[J].林业科学,2026,62(1):57-66,10.基金项目
国家重点研发计划项目子课题(2024YFD2201003,2024YFD2200404) （2024YFD2201003,2024YFD2200404）
国家自然科学基金项目(32101503,32401558) （32101503,32401558）
北京林业大学"5·5工程"科研创新团队项目(BLRC2023B08). （BLRC2023B08）
