【摘要】 利用0.4%、0.8%、1.2%、1.6%、2.0%、2.4%浓度的Na₂SO₄、NaCl和NaHCO₃在闽南饲用（印度）豇豆种子的萌发阶段进行胁迫处理，以蒸馏水处理作为对照，分析闽南饲用（印度）豇豆种子的发芽率、发芽指数、平均发芽时间，以及闽南饲用（印度）豇豆幼苗的活力指数、胚根长和胚芽长的变化规律，研究盐碱胁迫对闽南饲用（印度）豇豆种子萌发及幼苗生长的影响。结果表明：Na₂SO₄和NaCl处理后的豇豆种子萌发及幼苗生长指标均随盐溶液浓度的增大而呈下降趋势；相比于对照，0.4%浓度的Na₂SO₄和NaCl溶液处理后种子的发芽率、发芽势、发芽指数的差异不显著，在盐溶液浓度为0.8%～2.4%时，种子萌发及幼苗生长指标差异极显著；NaHCO₃处理下闽南饲用（印度）豇豆种子的发芽率、发芽势、发芽指数、活力指数、胚根胚芽长随着碱溶液浓度的增大呈现出先增后降的趋势，在NaHCO₃浓度为0.4%时，活力指数、胚根胚芽长与对照差异极显著。根据盐浓度与发芽率间的显著相关性建立线性回归方程，得出闽南饲用（印度）豇豆种子对Na₂SO₄、NaCl、NaHCO₃耐盐适宜浓度分别为0.79%、0.68%和0.61%，半致死浓度分别为1.38%、1.23%和1.28%，极限浓度分别为2.32%、2.12%和2.35%。更多还原

【Abstract】 The effects of saline-alkali stress on seed germination and seedling growth of Vigna unguiculata‘Minnan’were studied by Na₂SO₄,NaCl and NaHCO₃ solutions with concentrations of 0 （CK）,0.4%,0.8%,1.2%,1.6%,2.0%and 2.4%.The germination rate,germination index and average germination time of Vigna unguiculata‘Minnan’.were analyzed,as well as the changes of vigor index,radicle length and germ length of Vigna unguiculata‘Minnan’.The results showed that the seed germination and seedling growth indexes under Na₂SO₄ and NaCl treatments decreased with the increase of salt solution concentration.Compared with CK,there was no significant difference in germination rate,germination potential and germination index when the concentration of Na₂SO₄ and NaCl solution was 0.4%,and there was significant difference in seed germination and seedling growth index when the concentration of salt solution was 0.80%～2.4%.The germination rate,germination potential,germination index,vigor index,radicle and germ length of Vigna unguiculata‘Minnan’under NaHCO₃ treatment increased first and then decreased with the increase of alkali solution concentration.When the concentration of NaHCO₃ was 0.4%,the vigor index and the length of radicle and germ were significantly different from those of the control.According to the significant correlation between salt concentration and germination rate,the regression linear equation between them was established.The suitable salt concentrations of Na₂SO₄,NaCl and NaHCO₃ for Vigna unguiculata‘Minnan’were 0.79%,0.68%and 0.61%,the semi-lethal concentrations were 1.38%,1.23%and 1.28%,and the limit concentrations were 2.32%,2.12%and 2.35%,respectively.更多还原