Summary: |
Phosphorous fertilizers can contain cadmium (Cd) and when used they can enter food chains. The objective of this study was to evaluate the effect of phosphorous fertilization on the concentration of available Cd in four types of soils in Chile, which belonged to the orders Inceptisol, Alfisol, Ultisol and Andisol. The two treatments used were the control without fertilization and the application of a correction dose with a commercial fertilizer, triple superphosphate (SFT), which had a concentration of 53.2 mg of Cd per kg of fertilizer. The dose of fertilizer applied was that necessary to reach a level of 30 mg kg-1 of POlsen. The soils were incubated in an oven for 90 days, at 25ºC and field capacity humidity. The experimental design was completely randomized, with three repetitions for each soil and where the experimental unit was a container with 250 g of dry soil. Available Cd was measured at 1, 2, 7, 14, 21, 36, 49, 63, 77 and 90 days after incubation. The application of P in agronomic doses, using fertilizer with a high content of Cd, had a statistically significant effect on the concentration of Cd available in the studied soils, however, there was no effect of the incubation time on the availability of Cadmium. |
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