The trace of 59 Fe with ?Malus micromalus? cultured in nutrient solution under the controlled conditions indicate: distribution of 59 Fe in cutting roots and leaves were 18.1% and 70 9%, respectively.

• 室内营养液培养的八棱海棠苗用59Fe示踪结果表明 ；断根中分配的59Fe为 18.；1%25；叶中分配的59Fe占 70