Field studies of cadmium in potatoes (Solanum tuberosum L.), 1. Effects of lime and phosphorus on cv. Russet Burbank [Tasmania]
1993
Sparrow, L.A. (Tasmanian Dept. of Primary Industry and Fisheries, Kings Meadow (Australia). Mt Pleasant Lab.) | Salardini, A.A. | Bishop, A.C. (Tasmanian Dept. of Primary Industry and Fisheries, Devonport (Australia). Stoney Rise Centre)
In field experiments conducted at 3 sites on basaltic krasnozems, despite producing a range of topsoil pH of 5.2 and 7.1, broadcast lime had no effect on tuber Cd concentrations. Lime had no effect when banded with the basal P fertilizer, and the practice did not adversely affect yields. With broadcast lime, Cd availability from the P fertilizer band may have been affected. However, there were also no lime x P interactions at any site, suggesting that lime also had no effect on the availability of Cd in the soil. It is possible that Tasmanian krasnozems, with their high organic matter and iron oxide content, restrict the availability of Cd in the soil such that pH change exerts little net influence on Cd availability. Increasing amounts of Cd applied in P fertilizer increased tuber Cd concentrations significantly, but the increases were less per unit of P than those found previously when TSP with 151 mg Cd per kg was used.
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