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Assessing changes in Cd phytoavailability to tomato in amended calcareous soils.
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A plot study was conducted to assess changes in Cd phytoavailability to a tomato cultivar in an agricultural soil in Southeastern Spain amended in two different ways (A and B), under controlled conditions. The experimental soil corresponded to a fine-loamy carbonatic thermic Calcidic Haploxeroll (Soil Survey Staff, 1998). A) Soil was amended with a single application of sewage sludge from a municipal source that had a total Cd concentration of 0.5 mg kg-1 at a rate that represented a final average concentration in the mixture of soil and sludge of less than 50 µg Cd kg-1. B) The amendment consisted of the addition of a mineral fertiliser with the same amount of NPK as in the sewage sludge application. The final levels of Cd were supposed to be negligible. A plot series without amendments was also performed (C). DTPA plus triethanolamine, and ammonium acetate extractable fractions in soils were analysed for all the plots. The time-dependent Cd accumulation in different parts of the tomato plants was studied by means of a Cd salt treatment. For each block (A, B, and C) four levels of Cd (0, 3, 30, 100 mg kg-1) were added as CdCl2. There was a significant increase in plant Cd after the initial cropping. Tomato stems, leaves and fruits were analysed separately for Cd determination. Differential Cd distribution and accumulation in tomato parts was detected.
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MORAL HERRERO, Raul, CORTÉS LUCAS, Amparo, GOMEZ LUCAS, Ignacio, MATAIX-BENEYTO, J.. Assessing changes in Cd phytoavailability to tomato in amended calcareous soils.. _Bioresource Technology_. 2002. Vol. 85, núm. 1, pàgs. 63-68. [consulta: 7 de febrer de 2026]. ISSN: 0960-8524. [Disponible a: https://hdl.handle.net/2445/34010]