Direct and secondary effect of liming and organic fertilization on cadmium content in soil and in vegetables
2007
Zaniewicz-Bajkowska, A.,University of Podlasie, Siedlce (Poland) | Rosa, R.,University of Podlasie, Siedlce (Poland) | Franczuk, J.,University of Podlasie, Siedlce (Poland) | Kosterna, E.,University of Podlasie, Siedlce (Poland)
A direct and secondary effect of liming and organic fertilization on Cd content in soil, celeriac (Apium graveolens var. rapaceum) and leek (Allium ampeloprasum ssp. porrum) was examined. Celeriac was cultivated in the first year after lime application and organic fertilization, whereas leek was grown in the next year. Soil was limed with a calcium carbonate fertilizer at the rate of 2.0 t CaO/ha. Farmyard manure (60 t/ha), rye straw (4 t/ha), rye and winter vetch were applied as organic fertilizers. Liming significantly reduced the available Cd content in the soil. It also significantly reduced the Cd content in celeriac and leek compared with no-liming cultivation. Organic fertilization, especially farmyard manure and straw, significantly reduced the soil available Cd content as well as Cd content in the examined vegetables. The lowest Cd levels in celeriac leaves and in leek were recorded after the application of farmyard manure. A combined application of liming and farmyard manure most beneficially influenced Cd concentrations in celeriac leaves.
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