森林工程2025，Vol.41Issue(6)：1279-1289,11.DOI:10.7525/j.issn.1006-8023.2025.06.017
不同根系类型苗木根系生长对根域空间变化的差异响应
Root Growth Differential Response for Seedlings with Different Root Types under Varying Root Growth Space
摘要
Abstract
By comparing the response of root and overall seedling growth of Fraxinus mandshurica(deep-rooted seed-lings)and Larix gmelinii(shallow-rooted seedlings)to root space requirements and root restrictions,and this turns to clarify the relationship between the root type,root development and root growth space of seedlings.This study took the current-year F.mandshurica and L.gmelinii container seedlings as the research objects,and set up five root growth space(4 cm×20 cm,6 cm×20 cm,8 cm×20 cm,10 cm×20 cm,12 cm×20 cm)comparative experiments.Differences in seedling growth and root development were analyzed at the end of growing season.The seedling height,ground diam-eter,leaf area,total biomass,lateral root length,root volume,root amplitude,the proportion of 80°-90° lateral roots and lateral-root meristem length of F.mandshurica seedlings increased gradually with the increase of root growth space,while these indexes of L.gmelinii seedlings all increased first and then decreased with the increase of root growth space.With the enhancement of root restriction,the main root length of F.mandshurica seedlings gradually increased,the length of the main root in the minimum root growth space was about 1.5 times that in the maximum root growth space,the diameter of lateral roots at angles<60° for L.gmelinii seedlings gradually increased.Deep-rooted and shallow-rooted seedlings had different root restriction responses and root growth space requirements.When the root growth space was re-stricted,deep-rooted seedlings mainly resisted the influence of root restriction by increasing the length of the main root,while shallow-rooted seedlings enhanced their resistance mainly by increasing the diameter of lateral roots with smaller branch angles.The reduction of root growth space has a greater impact on the growth of deep-rooted seedlings,and the smaller the root growth space,the weaker the growth ability of seedlings;for shallow-rooted seedlings,moderate reduc-tion of root growth space actually promotes root development and seedling growth.关键词
水曲柳/兴安落叶松/根域空间/根域限制/根系类型/根系构型/根尖解剖结构Key words
Fraxinus mandshurica/Larix gmelinii/root growth space/root restriction/root type/root architecture/ana-tomical structure of the root tip分类
林学引用本文复制引用
王裕尧,张诚航,李浩楠,卫星..不同根系类型苗木根系生长对根域空间变化的差异响应[J].森林工程,2025,41(6):1279-1289,11.基金项目
"十四五"国家重点研发计划项目(2024YFD2200401-05). （2024YFD2200401-05）
