[Accumulation of selenium in green mass of maize and millet at different forms of selenic fertilizers]
2007
Kovalevich, Z.S. | Golovatyj, S.E., National Academy of Sciences. Scientific and Practical Center for Arable Farming (Belarus). Institute for Soil Science and Agrochemistry
The accumulation of selenium in green mass of maize and millet was studied in green-house experiment on sod - podzol loam sandy soil. Selenium was introduced in soil in doses 20-320 mg/kg-1in different chemical forms - selenate and selenit of sodium. Millet was found to accumulate selenium in a grater degree compared maize. Both studied crops more actively accumulated selenium when sodium selenate was introduced in soil. Independently on selenium doses its content in green mass of maize and millet not exceed permitted level when sodium selenit was applied. Introduction of 320 mg/kg-1 of sodium selenate resulted in the excess of permitted selenium content in maize, as well as introduction of 160 mg/kg-1 of sodium selenate caused the excess of permitted selenium content in millet. Factors of biological absorption of selenium on these crops on the background variant differed in 3 times and have made accordingly: 0,103 - for maize and 0,306-for millet. At the maximum dose of selenium 320 mkg/kg in the form of selenit in green mass of millet selenium has been collected in 11,9 times more than in green mass of maize. Application of selenium into soil in doses of 20-320 mkg/kg has promoted enrichment of green mass of maize and millet by selenium (up to 7,4 - 29,2 and 19,2 - 348,6 mkg/kg – at sodium selenit application, to 69 - 1310 and 236,9 - 2537,6 mkg/kg - at sodium selenate application)
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