不同钠盐胁迫对草木樨和碱茅种子萌发的影响

Effect of Salt Stress on Seed Germination of Melilotus and Puccinellia distans

为进一步探究草木樨和碱茅在盐碱地中的种植规律,研究了不同钠盐胁迫对草木樨和碱茅种子萌发的影响。采用纸上培养法对草木樨和碱茅种子用不同浓度的NaCl和Na2CO3溶液胁迫处理后进行发芽试验。结果表明:在不同浓度盐胁迫下,随着盐浓度的增加,草木樨和碱茅种子的发芽势、发芽率、发芽指数和部分萌发生理指标呈先上升然后逐渐降低的趋势,较低的盐浓度,可以促进草木樨和碱茅种子的萌发。在相同的盐度下,草木樨的各项生理指标和发芽特性均较碱茅的高,因此,在供试的盐浓度范围内,草木樨的耐盐性比碱茅强。NaCl对草木樨和碱茅种子发芽的抑制作用较Na2CO3的抑制作用强。

In order to explore the planting regular of Melilotus and Puccinellia distans in the saline-alkali field, the effect of different salt tolerance on plant germination progress were investigated by indoor germination. The paper culture method was used with different NaCl and Na2 CO3 salt stress solution concentrations, on the physiological indexes of Melilotus and Puccinellia distans were calculated. The results showed that under the salt stress the germination rate,germination index, some germination physiological indexes and sprouts growth of Melilotus and Puccinellia distans seeds increased first and then decreased with the increasing of salt concentration; Low concentration could promote the germination of Melilotus and Puccinellia distans. Under the same salt concentration, the salt tolerance of Melilotus was strong than Puccinellia distans. Melilotus had a relative high salt tolerance than Puccinellia distans in the certain salt concentration range,the inhibition of NaCl was strong than Na2CO3 on the seed germination of Melilotus and Puccinellia distans.