Annual Variability of Some Toxic Element Contents (Cd, Cr, Co, Ni, and Pb) and Response of Two Jerusalem Artichoke Varieties to Increasing Nitrogen Fertilizer at Constant PK Levels
Barbara Sawicka1, Dorota Kalembasa2
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1Department of Plant Production Technology and Commodities Science, University of Life Sciencesin Lublin,
Akademicka 15, 20-950 Lublin, Poland
2Department of Soil Science and Agricultural Chemistry, Siedlce University of Natural Sciences and Humanities,
Prusa 14, 08-110 Siedlce, Poland
Pol. J. Environ. Stud. 2013;22(3):861–871
Contents of cadmium, cobalt, chromium, nickel, and lead were determined in tubers of Jerusalem artichoke (Helianthus tuberosus L.) obtained from a field experiment carried out in 2003-05. The experimental factors consisted of two cultivars of Jerusalem artichoke (Albik and Rubik), plus different nitrogen nutrition levels on a background of constant phosphorus-potassium fertilization and of manure (FYM). The following experimental objects were formed: 1) control N0P0K0, and the following mineral objects: 2) N0P44K125, 3) N50P44K125, 4) N100P44K125, 5) N150P44K125, and 6) N200P44K125. Mineral fertilizers were not applied to the control object, but only manure (natural fertilizer) at the rate of 30 t·ha-1. The Rubik cv. accumulated more heavy metals than Albik cv.; the latter was characterized by less variability of heavy metals content. When applying constant phosphorus-potassium fertilization, the lowest cadmium content was recorded in combinations including 150 kg N·ha-1, cobalt – 100 kg N·ha-1, chromium (only phosphorus-potassium fertilization was used), as well as nickel and lead – in control object with no mineral nutrition. In both varieties of Jerusalem artichoke different amounts of heavy metals were collected due to the different mineral fertilization.