Zinc content in tissue of oats, rye and silage maize cultivated on strongly contaminated soil
2000
Miklovic, D. (Vyskumny Ustav Podoznalectva a Ochrany Pody, Bratislava (Slovak Republic))
In the years 1995-1998 were cultivated oats, rye and silage maize on the soil with overlimited content of zinc. From the agrochemical point of view the soil could be classified as a soil with neutral soil reaction, low content of phosphorus, middle content of potassium and total of nitrogen and with high content of magnesium and calcium. The influence of NPK-fertilization on the zinc bioavailability by cultivated plants in comparison with the non-fertilized control was evaluated on three nutrition and fertilization treatment (the minimum, traditional and high dosage). The content of zinc in soil and in plants was not influenced with the dosage of NPK-nutrients. It's content in the economical product - the corn, was over limit in both plants. Except the content of zinc in the straw of oats, where it was over the limit in spite of relatively high content (from 133 to 214 mg/kg of dry matter) was in the tissues of the straw of other monitored plants under the given hygienic limit. From the point of cumulation of zinc into the tissues of plants, the highest proportion was discovered in the straw of oats (69% from its content in soil) and the lowest in the straw of rye (20%). Total uptake of zinc by the yield from the unit of the area was in the order: silage maize 2459 g rye 1850 g oats 1524 g/ha
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