中国草地学报2026，Vol.48Issue(2)：55-69,15.DOI:10.16742/j.zgcdxb.20240370
赖草、羊草表型性状和根茎扩繁性状比较研究
Comparative Study on Phenotypic Traits and Rhizome Expansion Traits of Leymus secalinus and Leymus chinensis
摘要
Abstract
Leymus secalinus and Leymus chinensis are important rhizomatous grasses used in ecological restoration and forage production in the grasslands of northern China.Due to the"three low"(low seed set-ting rate,low germination rate,and low grass productivity)problems associated with their sexual reproduc-tion,their asexual reproductive capacity is particularly vital for ecological protection.To systematically compare the rhizome expansion capacity of the two species,a common garden experiment was conducted in Youyu County,Shanxi Province,China.Using non-destructive measurement methods,the rhizome traits and expansion capacity of 50 Leymus secalinus and 10 Leymus chinensis germplasm accessions were evalu-ated,and both intraspecific and interspecific differences were analyzed.Results showed that:(1)The phe-notypic traits of Leymus secalinus and Leymus chinensis germplasms exhibited strong similarity.Among these traits,leaf-related characteristics exhibited small variation and remained stable across accessions.In contrast,traits such as rhizome-derived ramet number,stem length,plant height,heading characteristics,and tillering capacity displayed wide variation,indicating complex variation patterns.(2)Both species dem-onstrated strong rhizome expansion ability,with Leymus secalinus generally exhibiting stronger rhizome expansion capacity than Leymus chinensis.(3)The spatial expansion distance factor of rhizomes was identi-fied as the primary contributor to the rhizome expansion ability of both species.This study provides valu-able references and scientific support for the ecological restoration and adaptive management of grassland ecosystems centered on Leymus secalinus and Leymus chinensis.关键词
赖草/羊草/根茎扩繁能力/草地生态修复Key words
Leymus secalinus/Leymus chinensis/Rhizome expansion ability/Grassland ecosystem restoration分类
农业科技引用本文复制引用
董一丁,吴聪,曹靖怡,赵诗梦,禹安然,侯向阳..赖草、羊草表型性状和根茎扩繁性状比较研究[J].中国草地学报,2026,48(2):55-69,15.基金项目
山西省重点研发计划项目(No.202102140601006) （No.202102140601006）
山西省现代牧草产业技术体系项目(2023CYJSTX11) （2023CYJSTX11）
中央引导地方科技发展资金项目(No.YDZJSX2022A038) （No.YDZJSX2022A038）
