Plants developed in calcisol soils have limitations in iron nutrition, so exogenous applications of organic acids plus iron chelate can be an alternative. With the objective of knowing the answer of adding organic acids in the fertilizer solution plus a ferric chelate on the characteristics of the ferric nutrition of tomato plants developed in the calcisol soil the present experiment was established. We conducted the experiment in two stages, in the first stage studied differents concentration of some organic acids: citric acid (CA), oxalic acid (OA), salicylic acid (SA) and humic complexes (HC) combined with a FeEDDHA iron chelate, we included treatment control FeEDTA and FeEDDHA and treatment without iron in the fertilizer solution. In the second stage we compared the best concentrations of organic acids in combination with FeEDTA iron chelate; we used to treatment control FeEDTA and FeEDDHA, and a control treatment without iron in the fertilizer solution. The best concentrations were CA 10M, OA 10M, SA 10M and HC 0.4 ml/l. In the second stage, the addition of CA+FeEDTA and HC+FeEDTA increased SPAD units, chlorophyll and vitamin C contents and fruit quality improved. An increase content of Fe, Zn and Mn in leaves was presented with treatment CA+FeEDTA and HC+FeEDTA. Addition of CA+FeEDTA improved the oxidation-

中文翻译：

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有机酸与铁螯合物结合改善钙质土壤中番茄的铁营养

在钙质土壤中发育的植物在铁营养方面存在局限性，因此有机酸加铁螯合物的外源应用可以作为替代方案。为了解在化肥溶液中添加有机酸加三价铁螯合物对钙质土壤中发育的番茄植株三价铁营养特性的影响，建立本试验。我们分两个阶段进行了实验，第一阶段研究了一些有机酸的不同浓度：柠檬酸（CA）、草酸（OA）、水杨酸（SA）和腐殖酸复合物（HC）与 FeEDDHA 铁螯合物的结合，我们包括处理对照 FeEDTA 和 FeEDDHA 以及在肥料溶液中不含铁的处理。在第二阶段，我们比较了有机酸与 FeEDTA 铁螯合物的最佳浓度；我们使用对照处理FeEDTA和FeEDDHA，以及肥料溶液中不含铁的对照处理。最佳浓度为 CA 10M、OA 10M、SA 10M 和 HC 0.4 ml/l。在第二阶段，CA+FeEDTA和HC+FeEDTA的添加增加了SPAD单位，叶绿素和维生素C含量，果实品质得到改善。CA+FeEDTA和HC+FeEDTA处理呈现出叶片中Fe、Zn和Mn含量的增加。添加 CA+FeEDTA 改善了氧化- 叶片中的锌和锰以 CA+FeEDTA 和 HC+FeEDTA 处理呈现。添加 CA+FeEDTA 改善了氧化- 叶片中的锌和锰以 CA+FeEDTA 和 HC+FeEDTA 处理呈现。添加 CA+FeEDTA 改善了氧化-