森林工程2025，Vol.41Issue(3)：517-525,9.DOI:10.7525/j.issn.1006-8023.2025.03.008
珙桐及其伴生树灯台树的凋落物水提液对彼此幼苗生长的化感效应
Allelopathic Effects of Water Extracts from the Litter of Davidia involucrata and Its Associated Tree Cornus controversa on the Growth of Each Other's Seedlings
摘要
Abstract
Rare and endangered plants have formed a stable association with their associated tree species in the long-term evolution process,but whether this association is related to allelopathy produced by litters is still unknown.Taking the unique rare and endangered plant Davidia involucrata Baill.and its associated species Cornus controversa Hemsl.in China as research objects,the allelopathic effects of water extracts from different types of litter(branch litter,leaf litter,and their mixture litter)at natural concentrations on each other's seedlings were studied.The results revealed that,1)the water extract from the branch litter of C.controversa significantly promoted the basal diameter and root length growth of D.involucrata seedlings,and increased the contents of chlorophyll a and b,total chlorophyll,leaf mass frac-tion of N,and P,while the extracts from leaf litter and branch-leaf mixture litter did not show significant promotional ef-fects.2)The water extract from the branch litter of D.involucrata significantly promoted the basal diameter growth of C.controversa seedlings and increased the contents of chlorophyll a and b,and total chlorophyll,whereas the extracts from leaf litter and branch-leaf mixture litter significantly reduced the contents of chlorophyll a and b,total chlorophyll,leaf mass fraction of N.3)The allelopathic effect index indicated that different litter types from C.controversa had allelo-pathic promotional effects on D.involucrata seedlings,the intensity from large to small was branch,branch-leaf mix-ture,and leaf;the allelopathic effects of different litter types from D.involucrata on C.controversa seedling were var-ied,showing promotion by branch litter,and inhibition by leaf litter and branch-leaf mixture litter,with the mixture lit-ter exhibiting stronger inhibitory effects.These findings suggest that the water extracts from different types of litter from D.involucrata and C.controversa have distinct allelopathic effects on each other's seedling growth,and the extracts from the two types of branch litter exhibit the greatest allelopathic promotional effects on seedlings.关键词
珙桐/灯台树/化感作用/凋落物/幼苗生长Key words
Davidia involucrata/Cornus controversa/allelopathy/litter/seedling growth分类
生物学引用本文复制引用
王雨洁,王欢,余景蕾,刘沁松,胥晓..珙桐及其伴生树灯台树的凋落物水提液对彼此幼苗生长的化感效应[J].森林工程,2025,41(3):517-525,9.基金项目
四川省科技厅自然科学基金项目(23NSFSC0144) （23NSFSC0144）
国家自然科学基金项目(32370412) （32370412）
第二次青藏高原综合科学考察研究项目(2019QZKK0404). （2019QZKK0404）
