[Efficiency of potassium and nitrogen fetilizers under spring wheat on sod-podzolic loam sandy soil contaminated with 37CS and 90Sr radionuclides]
2006
Tavrykina, O.M.,The National Academy of Sciences, Minsk (Belarus). Institute for Soil Science and Agrochemistry
In field experimentation on sod-podzolic loamy sand with increased content of mobile potassium the radiological and cost efficiency of potassium and nitrogen fertilizers doses on spring wheat Rassvet are established. Effective method of decrease in radionuclides transition in a spring wheat on sod-podzolic sandy soil with the optimum mobile potassium content is application of potash fertilizer of 120-180 kg/ha. Entering K120-180 on background N70P60 promoted decrease in 137Cs accumulation on 20 %, 90Sr on 39-40 % in comparison with a control variant. Increase of a doze of nitrogen fertilizer up to 110 kg/ha led to increase of 137Cs and 90Sr accumulation by grain of spring wheat on the average in 1,3 times. However it does not reduce the importance of their application on polluted territories by radionuclides as on a variant with joint entering the raised dozes of potash fertilizer - 180 kg/ha the greatest increase of productivity - 22,8 c/ha has been received, the greatest net profit from sale of fodder grain-511380 Br/ha and a level of profitability - 79 % was formed. At cultivation of spring wheat on territories polluted by radionuclides efficiency of protective actions essentially increases on soils with the density of pollution which is not exceeding 11 kBk/square m as in this case due to manufacture of the food raw material corresponding specifications, the net profit and profitability raise in 2,1 times in comparison with manufacture of fodder raw material
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