不同盐碱胁迫对饲用小黑麦种子萌发及幼苗生长的影响

doi:10.12160/j.issn.1672-5190.2024.03.008

摘要/Abstract

摘要： [目的]探究不同盐碱胁迫对饲用小黑麦种子萌发及幼苗生长的影响。[方法]利用NaCl、Na₂SO₄、Na₂CO₃和NaHCO₃溶液模拟盐碱胁迫环境,每种溶液的Na⁺浓度均设置为0（CK）、50、75、100、150、200 mmol/L;通过开展种子发芽试验,分析饲用小黑麦种子在不同种类盐碱及不同浓度Na⁺胁迫下的发芽率（germination percentage,Gp）、发芽指数（germination index,Gi）、平均发芽时间（mean germination time,MGT）以及幼苗活力指数（seedling vigor index,SVI）、胚根长及胚芽长的变化规律,揭示饲用小黑麦种子萌发及幼苗生长对不同盐碱胁迫的响应特征。[结果]不同盐碱种类、Na⁺浓度及两者之间的交互作用对饲用小黑麦种子Gp、Gi、MGT、SVI、胚根长及胚芽长具有极显著（P<0.01）影响;随着Na⁺浓度的升高,饲用小黑麦种子的Gp、Gi、SVI、胚根长及胚芽长呈下降趋势,而MGT呈上升趋势;相同Na⁺浓度下,饲用小黑麦种子对中性盐胁迫的耐受性高于对碱性盐胁迫的耐受性。[结论]随着Na⁺浓度的升高,饲用小黑麦种子萌发及幼苗生长受到的抑制作用增强,且碱性盐的抑制作用强于中性盐;饲用小黑麦种子在低浓度Na⁺胁迫下表现出一定的耐受性,提示可在我国轻度盐碱地上种植饲用小黑麦。

关键词: 饲用小黑麦, 盐碱胁迫, 种子活力, 种子萌发, 幼苗生长

Abstract: [Objective] This study aimed to assess the effects of different saline-alkali stresses on seed germination and seedling growth of forage triticale（× Triticosecale Wittmack）. [Method] The solutions of NaCl, Na₂SO₄, Na₂CO₃ and NaHCO₃ were used to simulate the saline-alkali stress environments, with Na⁺ concentrations set at 0 （CK）, 50, 75, 100, 150 and 200 mmol/L for each solution. Seed germination experiments were conducted to evaluate the change patterns of germination percentage （Gp）, germination index （Gi）, mean germination time （MGT）, seedling vigor index （SVI）, embryonic root length and embryonic bud length of forage triticale under the stresses induced by different types of saline-alkali and concentrations of Na⁺, to reveal the response characteristics of seed germination and seedling growth to different saline-alkali stresses. [Result] Different types of saline-alkali, concentrations of Na⁺ and their interactions all had extremely significant （P<0.01） impacts on Gp, Gi, MGT, SVI, embryonic root length and embryonic bud length of forage triticale. With the increase of Na⁺ concentrations, Gp, Gi, SVI, embryonic root length and embryonic bud length of forage triticale decreased, while MGT elevated. Under the same Na⁺ concentration, forage triticale seed exhibited higher tolerance to neutral salt stress than alkaline salt stress. [Conclusion] With the increase of Na⁺ concentrations, the inhibitory effects of different saline-alkali stresses on seed germination and seedling growth of forage triticale enhanced. Alkaline salt posed stronger inhibitory effect than neutral salt. Forage triticale seed showed certain tolerance to the stress induced by the lower Na⁺ concentrations, indicating that it could be planted on the mild saline-alkali soils in China.

Key words: forage triticale, saline-alkali stress, seed vigour, seed germination, seedling growth

中图分类号:

李韩晶, 夏方山, 白朝瑞, 郭嘉庆, 李嘉俊, 张金成. 不同盐碱胁迫对饲用小黑麦种子萌发及幼苗生长的影响[J]. 畜牧与饲料科学, 2024, 45(3): 58-63.

LI Hanjing, XIA Fangshan, BAI Chaorui, GUO Jiaqing, LI Jiajun, ZHANG Jincheng. Effects of Different Saline-alkali Stresses on Seed Germination and Seedling Growth of Forage Triticale[J]. Animal Husbandry and Feed Science, 2024, 45(3): 58-63.

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