Effect of potassium fertilizers on 137Cs transfer from sandy soddy-podzolic soil to plants | Влияние калийных удобрений на транслокацию 137Cs в растения из дерново-подзолистой песчаной почвы
2009
Belova, N.V. | Sanzharova, N.I. | Shishulina, M.V., All-Russia Research and Development Inst. of Agricultural Radiology and Agroecology, Kaluga Region (Russian Federation) | Moiseenko, F.V. | Vorob'eva, L.A., The D.N. Pryanishnikov All-Russia Research and Development Inst. of Agrochemistry, Bryansk Region (Russian Federation). Novozybkov State Agricultural Experimental Station
The purpose of the work is to study the behavior of potassium in sandy soddy podzolic soil and its influence on the availability of 137 Cs to plants of winter rye and lupine when applying various doses of potassium fertilizers (PF) and turf-manure compost (TMC). A many-years stationary experiment was established in the Bryansk region in 1986-1988 on soddy podzolic soil contaminated by the accident at the Chernobyl Power Station. The influence of fertilizer was studied in 4-field crop rotation in an experimental plot: seeded fallow (lupine, bird's-foot) – winter rye – potato – spring grains. Potassium and mineral fertilizers were applied. It was shown that the application of potassium fertilizers (from 0 to 180 kg/ha) increased the content of exchangeable potassium in the soil by 1.7-2-7 times and its mobility by 2.5-4.0 times which resulted in a decrease of 137Cs transfer to plants by 5.8-14 times. The inverse proportional relationship was found between the potassium mobility and the content of its mobile form and the accumulation coefficient of 137Cs by lupine and wheat rye plants. A linear relationship was reveled between the accumulation coefficient of 137Cs and the content of exchangeable radionuclide.
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