生态与农村环境学报2025，Vol.41Issue(4)：517-524,8.DOI:10.19741/j.issn.1673-4831.2024.0254
浙西南山区典型混交林分地下竞争分析研究
Analysis of Below-ground Competition in Typical Mixed Forest Stands in the Southwest Mountainous Area of Zhejiang Province
摘要
Abstract
Below-ground competition in mixed stands is an important breakthrough point for revealing species configura-tions,competitive strategies,and coexistence mechanisms in plant communities,however the existing research lacks a quantitative analysis of the extent of this competition.In this study,we used the PS index and Levins'overlap index,com-bined with stable isotope technique,to quantitatively analyze competition between water sources and root systems in typical forest stands of Michelia maudiae × Liquidambar formosana and Michelia maudiae×Chamaecyparis obtusa mixed forests in the mountainous area of southwestern Zhejiang.The study results showed that in M×L,Michelia mainly had absorbed soil water from 80-100 cm(67.2％),while Liquidambar evenly had absorbed soil water from all layers.In M×C,Michelia mainly had absorbed soil water from 80-100 cm(83.9％),whereas Obtusa mainly had absorbed soil water from 0～20 cm(38.3％).The M×L had higher water competition indices(0.95 and 0.84)than M×C(0.68 and 0.60)in the 0-20 and 80-100 cm soil layers.Meanwhile,the root index had indicated that the roots which were in deep soil and farther from the trunk of M×L were more competitive and these roots which were in shallow soil and close to the trunk of M×C were of more comparative advantage.In the mountainous area of southwestern Zhejiang,a hybridization pattern of Michelia and Obtusa is preferred.This study provides a reference for choosing the afforestation pattern for Michelia,a common species in subtropi-cal forests,and for selecting afforestation tree species.关键词
水分利用策略/水源竞争/根系竞争/贝叶斯模型Key words
water use strategy/competition for water resources/root competition/Bayesian model分类
环境科学引用本文复制引用
王筱迪,张勇,叶丽敏,刘自强..浙西南山区典型混交林分地下竞争分析研究[J].生态与农村环境学报,2025,41(4):517-524,8.基金项目
2022年度西北土地退化与生态恢复省部共建国家重点实验室培育基地/西北退化生态系统恢复与重建教育部重点实验室开放基金(LDER207ZQ02) （LDER207ZQ02）
国家重点研发计划项目(2023YFF1304404) （2023YFF1304404）
国家自然科学基金面上项目(42377068) （42377068）
