Influence of lime fertilizers on content of heavy metals in vegetables
2001
Jaervan, M. (Estonian Research Institute of Agriculture, Saku (Estonia)) | Poldma, P. (Estonian Agricultural University, Tartu (Estonia). Dept. of Horticulture)
The content of heavy metals in white cabbage, carrot, and red beet depending of various lime fertilizers was researched. The trials carried out on acid soil of South Estonia. Oil shale ash, dolomite meal, and the mixture of dolomite and limestone meal as lime fertilizers (application rate 5000kg CaCO3 per hectare) were used. Oil shale ash contained more heavy metals than meals of carbonate rocks. Regardless the fact that different amounts of heavy metals were applied to the soil with different lime fertilizers, it did not have an impact on the regular heavy metal content in the yield of vegetables. The liming of soils generally decreased the mobility and plant availability of heavy metals. Carrot grown on acid soil contained more Pb, Cd, Zn, andNi than that grown on soil fertilized with lime fertilizers. Carrot and beet accumulated 1.6-2.0 times more Cd and 1.5-2.5 times more Zn than cabbage
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