Cadmium and zinc concentrations and ratios in seed and tissue of solin (cv LinolaTM 947) and flax (cvs McGregor and Vimy) as affected by nitrogen and phosphorus fertiliser and Provide (Penicillium bilaji)

Field studies were conducted at three locations over 3 years to evaluate the impact of N and P fertilisation, Provide (Penicillium bilaji) and environment on cadmium and zinc concentrations and ratios in the seed and tissue of solin (cv LinolaTM 947) and traditional oilseed flax (cvs McGregor and Vimy). Although differences in Cd and Zn concentrations and ratios in seed and tissue occurred among flax cultivars, there were no differences between LinolaTM 947 and the traditional oilseed flax cultivars. Location had a large effect on Cd concentration in flax seed, presumably owing to differences in soil characteristics. Year‐to‐year variations were also large, with higher seed Cd concentrations occurring in years with greater precipitation. Effects of N, P and Provide on Cd concentration in flax seed and tissue were minor. The effect of environment, cultivar and fertiliser management differed for Zn and Cd, indicating differences in the controlling factors for accumulation of Cd and Zn in flax. © 2000 Society of Chemical Industry