有效微量元素缺乏导致食葵叶片枯褐原因初步分析

Primary Analysis on the Cause of Leaf of Confectionery Sunflower turning Brown and Withered

对微量元素缺乏导致食葵叶片失绿、褐化、干枯进行了初步试验分析研究。结果表明,在发生枯褐的食葵叶片中硼、铁、锰、镁等微量元素的含量比正常绿叶还高,但其中真正有效的微量元素并不足,因作物根层土壤pH值高,虽然食葵体内铁等微量元素的总含量并不低,但可参与正常生理活动的缺乏,造成食葵体内叶绿素正常生理代谢活动受阻,因而叶片失绿发黄、枯褐。

In this paper, the cause of leaf of confectionery sunflower turning brown and withered was analyzed. The amount of the mien- elements-B, Fe, Mn, Mg was higher in the brown and withered leaves than that in the normal green leaves. But the elective amount of the micro- elements was not enough due to the hish soil pH. So the normal physiological activity in the leaves was influenced and turned brown and withered.