NaCl、Na2SO4和Na2CO3对绿豆种子萌发的影响

为明确不同盐胁迫对绿豆种子萌发的影响,以晋绿9号为试验材料,分别测定不同浓度（0.5%、1.0%、1.5%、2.0%、2.5%）的NaCl、Na₂SO₄和Na₂CO₃胁迫下种子的相对发芽率、相对发芽势、平均发芽天数、相对发芽指数和相对盐害率。结果表明,3种盐胁迫均能抑制绿豆种子的萌发,种子萌发的相对发芽率、相对发芽势、相对发芽指数随盐浓度增加而降低,平均发芽天数和相对盐害率随盐浓度的升高而增加;不同盐分胁迫与绿豆种子发芽率之间的回归方程表明,3种盐胁迫对绿豆种子萌发的抑制作用表现为Na₂CO₃>NaCl>Na₂SO₄,晋绿9号的耐盐极限浓度分别为Na₂CO₃ 2.062%、NaCl 2.816%、Na₂SO₄ 7.684%。

Effects of NaCl,Na_2SO_4 and Na_2CO_3 Stress on the Seed Germination of Mung Bean

To determine the salt tolerance of mung bean seeds during germination, NaCl, Na₂SO₄ and Na₂CO₃ with concentrations of 0.5%, 1.0%, 1.5%, 2.0% and 2.5%, respectively, were selected for the germination test of Jinlü no.9 seeds in this study. Relative germination rate, relative germination vigor, average germination days, relative germination index and relative harm rate by salt were measured after salt treatment. The results showed that salts inhibited the germination and the relative germination rate, relative germination vigor, and relative germination index of seeds significantly decreased with increasing salt concentration. Meanwhile, average germination days and relative harm rate by salt significantly increased with increasing salt concentration. The linear regression between salt treatments and seed germination rate of mung beans indicated that the inhibiting order of the three salts was Na₂CO₃>NaCl>Na₂SO₄. The limiting salt solution concentration was Na₂CO₃ 2.062%, NaCl 2.816% and Na₂SO₄ 7.684%.