[Accumulation of copper and zinc in farm crops at different levels of their content in a soil]
1999
Rak, M.V. | Kovalevich, Z.S. | Safranovskaya, G.M. | Tikhanovich, Z.N. (Belarus Research Inst. for Soil Science and Agrochemistry, Minsk (Belarus))
In researches on a sod-podzolic loamy sand is established that the copper and zinc accumulation in plants is determined not only by the level of the contents of the mobile microelement forms in a soil, but also by biological features of a cultivated crop. On coefficient of biological copper absorption from a soil the studied crops have made the following decreasing line: meadow clovertimothycornbarley. At high levels of mobile copper content in soil its accumulation in plants of studied crops did not exceed threshold values for forages. The corn can be attributed to crops, which are more steady to superfluous copper content in a soil. The zinc content in clover hay higher than admitted concentrations was registered at the supply levels of soil with mobile zinc 6,7 mg/kg and more, and in corn green mass - 26,7 mg/kg and higher
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