THE EFFECTIVENESS APPLICATION OF SYSTEMS OF FERTILIZERS IN THE CULTIVATION OF RED CLOVER ON SOD-PODZOLIC LIGHT LOAMY SOIL

Abstract

On sod-podzolic light loamy soil the application N₉P₄₀K₆₀ and N₁₆P₆₀K₉₀ in top dressing in the spring and after the harvesting the cover crop (barley) was equivalent and increased the yield of green mass at the dose of N₉P₄₀K₆₀ 69 and 87 kg/ha and the dose of N₁₆P₆₀K₉₀ - on 171 and 181 kg/ha, respectively. The return of 1 kg of NPK kg of green mass of clover of application in the spring of N₁₆P₆₀K₉₀ was 103,0 kg and after harvesting the cover crope 109,0 kg. Non-root dressing in spring with boron and molybdenum on the background of N₁₆P₆₀K₉₀ to the increase in the yield of green clover mass by 60 c/ha (from 835 to 895 c/ha), the provision of feed unit with digestible protein by 9,9 g ( from 146 to 155,9 g). The use of N₁₆P₆₀K₉₀ in top dressing in the spring and after the harvesting the cover crop provided a higher net income (131,9 and 153,5 USD/ha) with a profitability of 44.6 and 51,3 %, respectively.