摘要： 采用水培的方法,研究了NaCl胁迫对燕麦和小麦幼苗生长及其营养吸收的影响,旨在为全面比较两种作物的耐盐性以及高效利用内蒙古地区的盐碱地提供基础信息。结果表明:与对照相比,低浓度NaCl处理(40 mmol/L)促进了燕麦的株高、生物量的增加,当NaCl浓度分别达到60 mmol/L与80 mmol/L时,明显降低了小麦与燕麦的株高、生物量,其中小麦较燕麦下降幅度大;随着NaCl浓度的增加,燕麦幼苗茎叶、小麦幼苗根中全N含量有所下降,而燕麦与小麦植株中全P含量有所增加;燕麦与小麦植株中K⁺、Ca²⁺含量、K⁺/Na+、Ca²⁺/Na+比值随NaCl浓度的增加迅速降低,且小麦的降低效应大于燕麦,在同一处理NaCl胁迫下燕麦的K⁺/Na+高于小麦。

关键词: 燕麦, 小麦, NaCl胁迫, 营养吸收, 生长

Abstract: The effects of NaCl stress on growth and nutrient absorption of oats and wheat seedlings were studied under hydroponics culture conditions, to provide basic information for comparing the two kinds of salt tolerance of crops, as well as the efficient utilization of saline land in Inner Mongolia region.The results showed that NaCl at low concentrations( 40 mmol/L) increased oats and wheat growth,while NaCl at 60 mmol/L for wheat and 80 mmol/L for oats significantly decreased plant height and biomass, and the higher decrements occurred in wheat; NaCl stress reduced the concentration of N in plants of oats and wheat, but increased P concentration in oats and wheat; NaCl stress reduced K⁺,Ca²⁺ concentrations, and K⁺/ Na+,Ca²⁺/Na+ ratios in both oats and wheat, and the decreasing amplitude was greater in wheat, and the ratios of K⁺/ Na + were higher in oats than wheat under the same NaCl stress．

Key words: Oats, Wheat, NaCl stress, Nutrient absorption, Growth

中图分类号: 

• S512.6