INFLUENCE OF OUTSIDE ROOT TOP- DRESSING BY MICROFERTILIZERS ON GREEN MASS AND GRAIN CORN QUALITY

Abstract

The use of trace elements in the foliar application of corn cultivated on sod- podzolic sandy loam soil at different levels of mineral nutrition had no significant effect on the accumulation of crude protein, crude fat, crude fiber, crude ash and nitrogen- free extractive substances in the green mass of corn. Increased nitrogen doses influenced protein content. Increasing the nitrogen dose from 120 to 180 kg/ ha resulted in an increase the protein accumulation in the green mass and corn grain from 8.3 % and 10.3 % (background 1 (manure 50 t/ha + N₁₂₀P₆₀K₁₂₀) to 9.6 % and 11.0 % (background 2 (manure 50 t/ha + N₁₈₀P₉₀K₁₈₀) corresponding. Application of micronutrients reduced the nitrates uptake in corn plants in all studied variants of the experiment and does not exceed the maximum permissible concentration of 500 mg/kg. The nitrate content in the first background was 287 mg/kg, on the second - 383 mg/kg.