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Influence of Formulation on the Cuticular Penetration and on Spray Deposit Properties of Manganese and Zinc Foliar Fertilizers

1
Aglukon Spezialdünger GmbH & Co. KG, Heerdter Landstr. 199, Düsseldorf D-40549, Germany
2
University of Bonn, INRES-Horticultural Sciences, Auf dem Huegel 6, Bonn 53121, Germany
*
Authors to whom correspondence should be addressed.
Academic Editor: Jerry H. Cherney
Agronomy 2016, 6(3), 39; https://doi.org/10.3390/agronomy6030039
Received: 30 March 2016 / Revised: 8 June 2016 / Accepted: 22 June 2016 / Published: 30 June 2016
Foliar fertilization, or the application of nutrient solutions to the foliage of plants, has become a very important tool as a supplement to traditional soil fertilization. So far, knowledge about the real mechanisms of foliar nutrient uptake is still limited. In this study different manganese (Mn) and zinc (Zn) carriers differing in their solubility and chemical characteristics (chelated or non-chelated, with or without the presence of a surfactant-penetrant) were compared with regard to their penetration characteristics through enzymatically-isolated cuticles. The experiments were explicitly conducted under high humidity conditions in order not to penalize compounds with a higher deliquescent point. The results show that Mn penetrates more rapidly through the cuticle than Zn ions for unknown reasons. The addition of a surfactant-penetrant enhances the penetration rate in the case of Mn ions. This trend is much less pronounced for zinc ions. Formulations based on insoluble carriers, such as carbonate or oxide, only poorly penetrate through the cuticle. In order to rapidly control micronutrient deficiency problems, only fully water soluble micronutrient carriers should be used. View Full-Text
Keywords: foliar fertilization; manganese; zinc; isolated cuticles; surfactant-penetrant; chelates foliar fertilization; manganese; zinc; isolated cuticles; surfactant-penetrant; chelates
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Alexander, A.; Hunsche, M. Influence of Formulation on the Cuticular Penetration and on Spray Deposit Properties of Manganese and Zinc Foliar Fertilizers. Agronomy 2016, 6, 39.

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