Humic substances and amino acids improve effectiveness of chelate FeEDDHA in lemon trees

Sanchez-Sanchez, A.; Sanchez-Andreu, J.; Juarez, M.; Jorda, J.; Bermudez, D.

Humic substances and amino acids improve effectiveness of chelate FeEDDHA in lemon trees

2002

Sanchez-Sanchez, A. | Sanchez-Andreu, J. | Juarez, M. | Jorda, J. | Bermudez, D.

Lemon trees cv. Fino were fertilized with mixtures of FeEDDHA and humic compounds (leonardite) or aminoacids. All the treatments improved the iron (Fe) uptake respect to a control fertilized only with FeEDDHA. The effect was more marked with humic substances (HS). The copper (Cu) uptake also increased, which can be a direct effect of the organic compounds, or indirect as a consequence of the release of EDDHA after Fe uptake. Humic compound also improved fruit weight. Vitamin C was affected by all the treatments depending on the ripening condition of the lemons (in a cold chamber or in the field).

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