盐胁迫对5 份三叶草材料种子萌发特性的影响

Impact of Salt Stress on Seed Germination Characteristics ofFive Clover Genotypes

为探讨不同盐浓度对车轴草属植物种子萌发及幼苗生长的影响,以筛选出耐盐性较强的品种,为改良盐渍化土地利用提供科学依据,研究以蒙农1号红三叶、多利红三叶、海法白三叶、新品系白三叶和野火球5份车轴草属植物为供试材料,通过不同浓度的NaCl溶液模拟盐胁迫,对发芽率、发芽势、发芽指数、活力指数、胚芽长和胚根长6项相对指标进行分析比较。结果表明,随着NaCl浓度增加,盐胁迫对种子萌发和幼苗生长抑制作用显著增强,所有供试材料的各项指标均呈下降趋势。在相同浓度处理下,不同品种供试材料的耐盐性存在差异,综合比较发现,蒙农1号红三叶在各项浓度盐胁迫下的耐盐性指标都优于其他供试材料,表现出较强的耐盐能力。研究旨在为改良盐渍化土地提供优良的植物材料,有效提高盐渍化土地利用效率,推动农业生产可持续发展,促进农牧业增产增收。

To explore the effects of different salt concentrations on the germination of seeds and seedling growth of Trifolium species and to select varieties with strong salt tolerance for the reclamation of saline-alkali land,this study used five genotypes of clover plants,including Mengnong No.1 Red Clover,Dolly Red Clover,Haifa White Clover,New White Clover Line,and Wildfire Ball,as test materials.Salt stress was simulated with different concentrations of NaCl solution,and six relative indices including germination rate,germination potential,germination index,vitality index,radicle length,and root length were analyzed and compared.The results showed that as the concentration of NaCl increased,the inhibitory effect of salt stress on seed germination and seedling growth significantly intensified,with all indices of the test materials showing a downward trend.Under the same concentration treatment,there were differences in salt tolerance among different varieties.A comprehensive comparison revealed that Mengnong No.1 Red Clover had better salt tolerance indices under various salt stress concentrations,showing stronger salt resistance.The study aims to provide excellent plant materials for the improvement of saline-alkali land,effectively improve the utilization efficiency of saline-alkali land,promote the sustainable development of agricultural production,and facilitate the increase of production and income in agriculture and animal husbandry.