摘要
为探明不同耐盐水稻品种产量形成对盐胁迫的响应,以3个耐盐品种和3个盐敏感品种为参试材料,通过两季大田试验,探究耐盐能力不同的水稻品种在3种盐胁迫处理(0.0%、0.3%和0.6%)下生长发育和产量性状差异。结果表明,耐盐水稻品种在0.3%和0.6%盐浓度胁迫下的减产率分别为38.1%~50.6%和51.2%~63.6%,明显低于盐敏感品种的47.9%~72.3%和72.9%~84.6%。同时,盐胁迫下,耐盐水稻品种在分蘖盛期和齐穗期的株高、茎蘖数和地上部干物质量降幅也明显低于盐敏感品种。进一步分析可知,与盐敏感品种相比,耐盐品种在0.6%盐浓度胁迫下具有较高的产量,齐穗期叶片还保持较高的SPAD值,成熟期叶片还保持较低的Na^(+)含量和钠钾比。因此,良好的农艺性状和生理指标是水稻在盐胁迫下获得高产的基础。
To investigate the yield response of different salt-tolerant rice varieties to salt stress,three salt-tolerant rice varieties and three salt-sensitive rice varieties were used as test materials.Through two seasons of field experiment,the differences in growth,development and yield traits of rice varieties with different salt-tolerant ability were studied under three salt stress treatments(0.0%,0.3%and 0.6%).The results showed that the yield reduction rates of salt-tolerant rice varieties under 0.3%and 0.6%salt stress were 38.1%~50.6%and 51.2%~63.6%,respectively,which were significantly lower than those of salt-sensitive rice varieties(47.9%~72.3%and 72.9%~84.6%).At the same time,the decrease of plant height,number of tillers and above-ground dry matter of salt-tolerant rice varieties was significantly lower than that of salt-sensitive rice varieties at the full tillering stage and full heading stage.Further analysis showed that compared with salt-sensitive varieties,salt-tolerant varieties had higher yield under 0.6%salt concentration stress,and the leaves still maintained higher SPAD value at full heading stage,and lower Na^(+) content and sodium potassium ratio at maturity stage.Therefore,good agronomic traits and physiological indexes are the basis for rice to achieve high yield under salt stress.
作者
程生海
郭夏宇
陶维旭
冀俊超
何爱斌
艾治勇
CHENG Shenghai;GUO Xiayu;TAO Weixu;JI Junchao;HE Aibin;AI Zhiyong(Sanya Nanfan Research Institute,Hainan University,Sanya,Hainan 572000,China;Sanya National Salt-alkali-resistant Rice Technology Innovation Center,Sanya,Hainan 572000,China;State Key Laboratory of Hybrid Rice,Hunan Hybrid Rice Research Center,Changsha,Hunan 410125,China)
出处
《杂交水稻》
CSCD
北大核心
2024年第2期97-104,共8页
Hybrid Rice
基金
海南省重大科技计划项目(ZDKJ202001)。
