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当前位置: 首页 > 文章 > 盐碱胁迫下燕麦生长及阳离子吸收特征 应用生态学报 2011,22 (11) 2875-2882
Position: Home > Articles > Oat growth and cation absorption characteristics under salt and alkali stress. Chinese Journal of Applied Ecology 2011,22 (11) 2875-2882

盐碱胁迫下燕麦生长及阳离子吸收特征

作  者：
范远;任长忠;李品芳;任图生
单  位：
白城市农业科学院;中国农业大学资源与环境学院
关键词：
苏打碱土;燕麦;盐分胁迫;K+;/Na+;吸收选择性
摘  要：
在吉林白城地区盐碱土上监测了3个盐分胁迫水平下燕麦的生长动态及对土壤阳离子的吸收特征.结果表明:在低度、中度和高度3个胁迫水平下燕麦地上部生长和产量构成因素没有显著差异,但根部干质量和根冠比随盐碱胁迫程度的加重而显著降低,在成熟期,中度和高度胁迫下的根冠比分别是低度胁迫下的77.2%和64.5%.3个胁迫水平下燕麦的K+/Na+和Ca2+/Na+在三叶期差异最大,而在抽穗期无显著差异.随着盐分胁迫程度的加重,燕麦的离子吸收选择性系数在灌浆期显著降低,而运输选择性系数无显著变化.因此,燕麦能够在一定程度上适应苏打碱土的盐碱胁迫,适应能力随着胁迫水平的增加而降低;燕麦根部生物量的减少和抽穗期较强的离子选择吸收能力可能有利于地上部的生长和产量构成.
译  名：
Oat growth and cation absorption characteristics under salt and alkali stress.
作  者：
FAN Yuan1,REN Chang-zhong2,LI Pin-fang1,REN Tu-sheng1(1College of Resources and Environmental Sciences,China Agricultural University,Beijing 100193,China;2Baicheng Academy of Agricultural Science,Baicheng 137000,Jilin,China)
关键词：
soda-alkaline soil;oat;salt stress;K+/Na+;absorption selectivity.
摘  要：
This paper monitored the oat growth and cation absorption characteristics on a saline-alkali soil in the Baicheng region of Jilin Province under low,medium,and high levels of salt stress.No significant differences were observed in the shoot growth and yield components under the three levels of salt stress,but the root biomass and root/shoot ratio decreased significantly with increasing salt stress level.At maturing stage,the root/shoot ratio under medium and high salt stresses was 77.2% and 64.5% of that under low salt stress,respectively.Under the three levels of salt stress,the K+/Na+ and Ca2+/Na+ ratios in oat plant had significant differences at trefoil stage,but no significant differences at heading stage.With the increase of salt stress level,the cation absorption selectivity coefficient of oat at filling stage decreased significantly,but the transportation selectivity coefficient had no significant difference under the three levels of stress.It was concluded that oat could adapt to the salt and alkali stress of soda-alkaline soil to some extent,and the adaptation capability decreased with the increasing level of stress.The decrease of oat root biomass and the stronger ion selective absorption capacity at heading stage under salt and alkali stress could benefit the shoot growth and yield components of oat.

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