摘要
本文总结概述了氮、磷、钾三种大量营养元素与作物抗旱性关系的研究结果,认为作物对干旱的适应方式是多途径的,然而无机营养对作物抗旱性各种机制的影响并不都是完全一致的,有的作用利于作物抗旱性提高,有的作用则不利于作物的抗旱性。在某种程度上无机营养也影响作物的生理抗旱机制。在干旱条件下,一般高营养水平作物叶片气孔导度的下降幅度比低营养水平作物叶片气孔导度的下降幅度大。无机营养对作物渗透节调影响的研究结果不一致,然而无机营养水平提高能够促进游离脯氨酸积累,这一结果是共同的。在耐脱水性方面,高营养水平作物原生质的耐脱水性和原生质膜的稳定性都增强。
It is summarized the relationship between the three macronutrition elements——Nitrigen, phosphorus, potassium and the drought resistance of crop plants in the paper. There are many ways for the adaptation of crop plants to drought.And the effects of mineraI nutrition on every mechanism of drought resistance are not totally consistent. Some effects are helpful for the drought resistance of crop plants and others are not. Also, mineral nutrition influences the mechanism of physiological drought resistance to a certain extent The leaf stomatic conductivity in the general high nutrition crop plants decreases more than that in the low under drought circumstance. The research achievement shows that the effects of mineral nutrition on the crop osmotical adjustment are changeable. The result is the same that the increase of mineral nutrition in crop plants can promote the accumulation of free proline in crop plants.In terms of dehydration endurance, the dehydration tolerance of protoplasm and the stability of protoplasmic in higt mineral nutrition can be strengthened
出处
《干旱地区农业研究》
CSCD
北大核心
1989年第4期77-84,共8页
Agricultural Research in the Arid Areas
