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根系输液条件下 ,N Fe能够在短时间内有效地矫正苹果缺铁失绿症 ,EDTA Fe容易产生肥害 ,柠檬酸铁效果居中。红色邻二氮杂菲铁示踪结果表明 :二价铁肥根系输液处理时仍以二价态由根被动吸收 ,运输到根、茎、叶和主脉内 ,运输部位都是靠近形成层的木质部 ,运输速度每小时可达数十厘米。室内营养液培养的八棱海棠苗用 5 9Fe示踪结果表明 ,断根中分配的 5 9Fe为 1 9.3% ,叶中分配的 5 9Fe占 70 .9% ,八棱海棠5 9Fe示踪结果表明 ,断 1、 2、 3条根 5 9Fe在叶中分配的比例分别为 57.9%、 63.6%和 68.0 %
Under the condition of root transfusion, N Fe can effectively correct the iron deficiency chlorosis in apple in a short time, EDTA Fe is easy to produce fertilizer and iron citrate effect is middle. The results of red ortho-phenanthroline tracing showed that bivalent iron fertilizer was still absorbed by the root in the bivalent state and transported to the roots, stems, leaves and main veins while the transport sites were close to the formation layer Xylem, transport speed up to tens of centimeters per hour. The results of 5 9 Fe tracing showed that the distribution of 5 9 Fe was 1 9.3% in rooting and 59.9% in leaf. The results of 5 9 Fe tracing showed that, The proportion of 5 9 Fe distributed in the leaves of 1, 2, 3 branches was 57.9%, 63.6% and 68.0% respectively,