水培条件下沙冬青幼苗对盐胁迫的响应

研究了水培条件下不同浓度的单盐和复盐对沙冬青(Ammopiptanthus mongolicus)幼苗生长的影响，并通过施用磷肥研究其对盐胁迫的耐受性变化。结果表明，沙冬青幼苗对单盐胁迫的耐受性较强，0.7%以下均可正常生长，当浓度超过0.8%时死亡率增加，1.0%时死亡率达到86%。但在复盐胁迫下其耐盐性较差，浓度为0.6%时死亡率达到了93.3%。适量施加磷肥不仅可以提高沙冬青对单盐毒害的耐受性，并且可以起到壮苗的效果。

The Response of Ammopiptanthus mongolicus seedings to Salt Stress under Hydroponics

Hydroponics experiments were conducted to study the changes of biological aspects under different levels of NaCl and compound-salt stress with the seedlings of Ammopiptanthus mongolicus. The effect of varying concentrations of Phosphate fertilizer solutions on the tolerance under salt stress was also evaluated. The result indicated that, the tolerance under the NaCl stress was stronger than that under compound-salt stress. When the concentration was below 0.7%, the growth was normal, when the concentration surpassed 0.8%, the mortality rate increased, and under the concentration of 1.0% the mortality rate was 86%. The tolerance under the compound salt stress was weak. When the concentration was 0.6%, the mortality rate achieved 93.3%. Proper phosphate fertilizer enhanced the seedling tolerance under NaCl stress as well as made sprout stronger.