Residual effect of cadmium applications in different crop rotations and environments on durum wheat cadmium accumulation

Cadmium (Cd) is one of the heavy metals commonly present in soils that is toxic
for living organisms and carcinogenic in humans. The uptake of Cd by a crop depends on
various factors such as soil properties, plant-soil interaction, fertilizer management, and pre vious crop. The aim of the present study was to evaluate the residual effect of three Cd rates
applied in three preceding crops (durum wheat [Triticum turgidum L. var durum], white lupine
[Lupinus albus L.], and narrow-leafed lupine [Lupineus angustifolius L.]) on total dry matter,
grain yield, and Cd concentration and uptake in three durum wheat cultivars in four envi ronments. The residual effect of a cadmium chloride (CdCl2
) dose applied in the preceding
crop to durum wheat was affected by location and previous crop, with the greatest effect in La
Serena with narrow-leafed lupines as the preceding crop. Finally, in soils where a critical level
of Cd is present, narrow-leafed lupines should not be used as a previous crop to durum wheat.