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作 者 ：崔美香1;薛进军1;2;王秀茹1;台社珍1;张福锁3;李绍华3

期 刊 ：植物营养与肥料学报 2005年 11卷 1期 页码：133-136

关键词：铁肥；树干强力高压注射；苹果；缺铁失绿症；

Keywords:iron fertilizer, high-pressure trunk-injection, apple trees, iron deficiency chlorosis.,

摘 要 ：利用N-Fe、邻二氮杂菲铁和.⁵⁹Fe作为铁源,以3-8年生富士／八棱海棠为试材进行主干强力高压注射试验。结果表明,铁肥树干强力高压注射,主要以二价铁(Fe2+)沿中央木质部的导管运输,大部分向下运输,使铁在根中大量贮存;向上运输较少,运输速度为每小时数百厘米,矫正缺铁失绿症的速度比根系输液慢,但由于根中贮存大量的铁,持效期较长。主干强力高压注射产生肥害的机理是先使吸收根中毒,然后导致叶片枯萎,提高注射部位,提高注射液浓度和减少注射的用药量,可以防止或减轻肥害的产生。

Abstract:Iron fertilizer can not satisfactorily correct chlorosis when fertilized in the soil, as Fe²⁺ in the fertilizer is easily oxidized into Fe³⁺ in the soil. High-pressure trunk-injection of iron fertilizer was reported to be effective to correct chlorosis, but the mechanism involved was unknown. The objective of this paper was to better understand the mechanism of correcting chlorosis with iron fertilizer by using high-pressure trunk-injection method.The experiments were carried out with apple (Malus pumila, cultivar Fuji) during the year 2000-2002 at experimental station of Quzhou of China Agricultural University and in the Yongnian county of Hebei province. The N - Fe, O-phenanthroline-Fe and ⁵⁹Fe were injected through the tree trunk. The results indicated that Fe²⁺ was transported along the central xylem, and most of Fe²⁺ was stored in roots due to the difficulties in root to shoot transportation of Fe²⁺. Regreening in iron deficiency chlorosis trees was slower but the effect of correcting iron deficiency chlorosis lasted longer when iron fertilizer was injected than was root-supplied.

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