The Transfer of Cu, Zn, Mn and Fe between Soils and Allium Plants (Garlic and Onion), and Tomato in the Southwest of the Buenos Aires Province, Argentina

DOI: 10.4236/ajps.2014.54062   PDF   HTML     5,538 Downloads   7,153 Views   Citations


Chemical extraction methods are generally used to evaluate trace element concentrations in soils. The adequacy of these soil tests is commonly assessed by comparing the extraction results with the metal contents in the plants. In this study, soil and leaf samples were collected in the southwest area of the Buenos Aires Province, Argentina. Garlic (Allium sativum L.), onion (Allium cepa L.) and tomato (Solanum lycopersicum L.) are species of great regional economic importance. These crops need good mineral nutrition for optimum growth and sustainable production. Cu, Zn, Mn and Fe micronutrient uptake by plants was analyzed together with the trace element contents in the soil in which those plants were grown. A single EDTA-extraction procedure was performed to determine soil micronutrients. The amount of extractable-trace elements increased as the concentration of the chelating agent EDTA increased. The range of total element content in soil was: 15.68-31.5 mg·kg-1 for Cu, 75.0-386.3 mg·kg-1 for Zn, 542.5 -1686 mg·kg-1 for Mn and 28,325-32,675 mg·kg-1 for Fe. Micronutrient contents in mature leaf tissue were determined by the acid digestion method. Total and available micronutrient content in soil as well as total content in leaves were measured by flame atomic absorption spectrometry (FAAS). Total micronutrient content and the available extractable-fraction in soils were below the critical values for plant growth. This was in agreement with the amount of micronutrients present in the leaf tissue. A strong relationship between the extraction data and the soil-plant transfer coefficients suggested an appropriate exchange of trace elements from soils to garlic, onion and tomato plants.

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M. Moralejo and S. Acebal, "The Transfer of Cu, Zn, Mn and Fe between Soils and Allium Plants (Garlic and Onion), and Tomato in the Southwest of the Buenos Aires Province, Argentina," American Journal of Plant Sciences, Vol. 5 No. 4, 2014, pp. 480-487. doi: 10.4236/ajps.2014.54062.

Conflicts of Interest

The authors declare no conflicts of interest.


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