10份野生披碱草种质耐盐碱性综合评价

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中图分类号：S602.4 文献标识码：A 文章编号：1007-0435（2026）03-0853-12

doi：10.11733/j.issn.1007-0435.2026.03.011

引用格式：，等.10份野生披碱草种质耐盐碱性综合评价[J].草地学报，2026，34（3）：853—864 Liu Rui-bo， Cao Shi-ya，He Xin-yue，et al. Comprehensive Evaluation of Salt-Alkaline Tolerance in 10W ild Elymus dahuricusGermplasms[J].ActaAgrestia Sinica，2026，34（3）：853-864

Abstract：This study aimed to evaluate the salt-alkali tolerance of Elymusdahuricus accessions during germination and early seedling stages.Three preliminary accessions were first screened under gradient salt-alkali stress （2 （NaCl：NaHCO3=3：1） to determine appropriate treatment levels；1Oo and 150mmol⋅L-1 were selected for subsequent experiments based on germination rate.Ten wild accessons originating from diverse regions and habitats were thensubjected to these two stressconcentrations in a pot trial，with water as the control. Germination and agronomic traits were measured to comprehensively assess salt -alkali tolerance.Salt - alkali stress sig nificantly inhibitedseed germination and seedling growth，and the inhibitory efects intensified with increased concentration.Under 100mmol⋅L-1 stress，accession E5 exhibited the highest values for all germination parameters and was identified as the most tolerant one，whereas E6 showed the poorest performance，with 0% （204号 germination at 150mmol⋅L-1 ，indicating lowest tolerance. The ten accessions were consequently ranked as E5 >E2>E9>E1>E10>E4>E3>E7>E8>E6 ，and classified into five categories：highly tolerant，tolerant， moderately tolerant，weakly tolerant and non-tolerant. These results provide valuable germplasm resources and a theoretical basis for breeding salt-alkali-tolerant E dahuricus cultivars and for elucidating the molecular mechanisms underlying salt- alkali tolerance. Key Words： Elymusdahuricus;Salt-alkaline stress; Comprehensive evaluation;Germplasm resources

披碱草（Elymusdahuricus）为一种多年生草本植物，具有耐盐碱、耐旱、抗寒、抗风沙、抗病虫害等特性，是我国北方重要的生态草种[1-2]。（剩余21260字）