不同盐分类型对一年生早熟禾种子萌发和幼苗生长的影响
收稿日期: 2022-12-09
修回日期: 2023-02-09
网络出版日期: 2023-08-01
基金资助
甘肃省教育厅优秀研究生“创新之星”项目(2023CXZX-626);国家自然科学基金项目(31560667);甘肃省林草局草原生态修复治理科技支撑项目(GSLC-2020-3)
Effects of different salt types on seed germination and seedling growth of Poa annua
Received date: 2022-12-09
Revised date: 2023-02-09
Online published: 2023-08-01
采用培养皿法,研究不同盐分类型和盐浓度对一年生早熟禾种子萌发特性的影响,测定其相对萌发率、相对发芽势、相对萌发指数、相对活力指数、相对胚芽长、相对胚根长和相对盐害率等指标,分析一年生早熟禾种子萌发和幼苗生长对不同盐分类型的响应。结果表明:(1) 永昌种源一年生早熟禾的种子萌发和幼苗生长特性均高于其他3个种源。(2) 在不同盐分类型、盐浓度及主要因素交互作用下一年生早熟禾的种子萌发和萌发期幼苗生长均受到显著抑制,碱性盐毒害强于中性盐,与萌发期幼苗的胚芽相比,胚根的响应更为敏感。(3) 不同盐分类型对一年生早熟禾种子萌发期的盐害性强弱依次为:Na2CO3>NaHCO3>Na2SO4>NaCl。研究结果可为种植一年生早熟禾生态修复不同类型盐碱地提供科学依据。
李娟霞 , 白小明 , 张翠 , 冉福 , 李萍 , 闫玉邦 , 张才忠 , 朱雅楠 , 陈辉 . 不同盐分类型对一年生早熟禾种子萌发和幼苗生长的影响[J]. 干旱区研究, 2023 , 40(7) : 1131 -1140 . DOI: 10.13866/j.azr.2023.07.10
The effects of different salt types and concentrations on the germination characteristics of Poa annua seeds were studied using the Petri dish method in this study. The relative germination rate, potential, index, vigor, bud length, radicle length, and salt damage rate were measured, analyzing the responses of P. annua seed germination and seedling growth to different salt types. The results indicated that: (1) P. annua from Yongchang had superior germination and seedling growth characteristics compared with the other provenances. (2) various salt types and concentrations significantly inhibited seed germination and seedling growth, with alkaline salts exhibiting stronger toxicity compared with neutral salts, and radicles being more sensitive than buds during germination; and (3) the salt toxicity of different salt types during P. annua seed germination ranked as follows: Na2CO3>NaHCO3>Na2SO4>NaCl. Therefore, this study provides a scientific basis for planting P. annua for ecological restoration of different types of saline lands.
Key words: Poa annua; salt type; germination characteristics; seedling growth; salt tolerance
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