3种盐胁迫对小麦苗期生长的影响

Effects of Three Kind of Salt Stress on Growth of Wheat Seedling stage

为探讨土壤盐分含量与小麦生长的关系,选用永良4号,通过盆栽试验,研究了在不同盐分离子种类NaCl,Na2SO4,NaCl+Na2SO4,7个盐分水平(0.1%,0.2%,0.3%,0.4%,0.5%,0.6%,0.7%)条件下小麦苗期的生长情况。结果表明,随着土壤盐浓度的升高,小麦的出苗率、株高均有所下降。NaCl对小麦的胁迫作用最大,NaCl+Na2SO4次之,Na2SO4最小。低浓度盐胁迫对小麦根的生长有一定的刺激作用,但随着盐浓度的增加,盐分对根的生长产生了抑制作用,但作用均比较小,并且与地上部分相反。试验结果将对盐渍化耕地小麦生产有重要的参考价值。

In this study, we select spring wheat （yongliang4） that main grow in Midwest Inner Mongolia. Pot experiments were conducted under laboratory to study the effects of soil salinity levels （0.41% ,0.2% ,0.3 % ,0.4% ,0.5%, 0.6 % ,0.7 % ） and three soil varieties （NaCl, NaCl ＋ Na2SO4, Na2SO4 ） on seedling stage growth of wheat. The results showed that emergence rate, shoot length of wheat, while they diminished with increasing soil salinity. Among the three salt, Salt stress was NaCl 〉 NaCl ＋ Na2SO4 〉 Na2SO4. Lowness concentration of salt stimulate, the root growth of wheat was more adversely affected compared to shoot growth by soil salinity. The results will has important referenced value to wheat production to salt-affected cropland.