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研究了水培和土培条件下硅对盐敏感大麦(Hordeum vulgareL.) 科品7 号和耐盐大麦鉴4 耐盐性的影响及其作用机制。结果表明,水培和土培条件下适量加硅可降低大麦的盐害。硅显著提高盐胁迫大麦根系脱氢酶活性,降低叶片细胞汁液浓度。硅可显著提高盐胁迫下大麦体内的钾离子浓度、降低钠离子浓度,并提高土培大麦植株体内氮、磷的积累量及磷的浓度,改善盐胁迫大麦植株的养分平衡状况。硅对耐盐大麦盐害的缓解效果比对盐敏感大麦更显著。硅对大麦耐盐性的影响主要是通过降低钠离子毒害、减轻水分胁迫程度和改善植株体内的养分平衡状况而实现的。硅参与了植物的代谢或生理活动。
The effects of silicon on the salt tolerance of Hordeum vulgare L. 7 and salt tolerant barley 4 under water culture and soil culture were investigated. The results showed that adding appropriate amount of silicon under hydroponics and soil culture could reduce salt damage of barley. Silicon significantly increased the root dehydrogenase activity of barley under salt stress and decreased the concentration of leaf juice in the leaves. Silicon can significantly increase the concentration of potassium in barley under salt stress, decrease the concentration of sodium, and increase the accumulation of nitrogen and phosphorus and the concentration of phosphorus in cultivated barley, and improve the nutrient balance of barley under salt stress. Salinity alleviation of salt-tolerant barley is more significant than salt-sensitive barley. The impact of silicon on salt tolerance of barley is mainly achieved by reducing the poisoning of sodium ions, reducing the degree of water stress and improving the nutrient balance in plants. Silicon participates in plant metabolism or physiology.