Efficiency of phosphorus fertilization in the cultivation of fiber flax on sandy loam soil

Abstract

The paper presents the results of a study on the effect of phosphorus fertilization on the fiber content in the trust and the yield of products when cultivating flax on sod-podzolic sandy loam soil. With the content of mobile phosphates in the arable layer of 160–165 mg/kg of soil, the optimal dose of phosphorus fertilizer was set at 30 kg/ha, which ensured seed yield 7,0 c/ha, trusts – 45,6, fiber – 13,8, including long – 8,2 c/ha, profitability of production – 43 %. In the total removal of phosphorus by the flax crop, the proportion of phosphorus fertilizer is 5–6 %, and 94–95 % of phosphorus is consumed by flax from the soil.