Abstract:

To explore the response of rice variety Haidao 86 under saline-alkali stress, the ability of saline-alkali tolerance of Haidao 86 in germination were studied in the experiment under different salt（NaCl）, alkali（Na2CO3）and saline-alkali（NaCl-Na2CO3）mixed stress, with rice variety Huanghuazhan as control. The results showed that: （1）Haidao 86 threshold value of saline tolerance was 0.9%~1.0% under salt（NaCl）stress, which showed Haidao 86 were highly resistant to salt（NaCl）; （2）Haidao 86 threshold value of saline-alkali tolerant was 0.30%~0.35% under alkali（Na2CO3）stress，which indicated Haidao 86 were highly resistant to alkali（Na2CO3）. （3）Haidao 86 threshold value of saline-alkali tolerant was A2（0.8%）B2（0.15%）~A2（0.8%）B3（0.25%） under saline-alkali mixed stress, and interaction effect of saline-alkali was significant on this study conditions.

Key words: Haidao 86, germination period, germination vigor, germination rate, relative saline-alkali damage rate

摘要：

利用盐（NaCl）和碱（Na2CO3）配制梯度浓度盐、碱及盐碱混合溶液，以黄华占为对照，研究海稻86与黄华占对盐碱胁迫的响应，初步探求海稻86萌发期耐盐碱阈值。结果表明，在盐（NaCl）胁迫下，海稻86耐盐性阈值范围为0.9%～1.0%，表现出极强的耐盐性；在碱（Na2CO3）胁迫下，海稻86耐碱性阈值范围为0.30%～0.35%，表现出极强的耐碱性；盐碱混合胁迫下，盐碱互作效应明显，本试验条件下，海稻86耐盐碱性阈值范围在 A2（0.8%）B2（0.15%）～A2（0.8%）B3（0.25%）之间。

关键词: 海稻86, 萌发期, 发芽势, 发芽率, 相对盐碱害率