The Influence of Bisolbifit as a Fertilizer Modifier on the Oat Productivity

Abstract

The purpose of the research was to study the effect of mineral fertilizers and biological product Bisolbi-fit as a modifier on the oat productivity. The studies were carried out on the experimental field of Ulyanovsk Research Institute of Agriculture, branch of Sam SC RAS. The soil was leached, heavy-clayey chernozem. The experiment was carried out in a 3-fold repetition by the method of split plots with a systematic arrangement of options. The total area of one plot was 145 m2 (5.8×25), the accounting area was 100 m2 (4×25). The experiment scheme was as follows: 1. Control; 2. Presowing seed treatment with BisolbiFit in a dose of 400–600 g/t; 3. N15P15K15 in a dose of 15 kg ai/ha; 4. N15P15K15m in a dose of 15 kg ai/ha; 5.½ N15P15K15m in a dose of 7.5 kg a.i./ha. The effectiveness of the fertilizers was assessed during the cultivation of crops for three backgrounds: 1) zero – without fertilization; 2) NH4NO3m – treated with BisolbiFit in the dose of 40 kg a.i./ha; 3) NH4NO3 – in a dose of 40 kg ai/ha. It was established that the use of the microbiological preparation based on the Bacillus subtilis strain Ch-13, intended both for inoculation of seeds and use as a biomodifier of mineral fertilizers, had a positive effect on the crop structure, yield and grain quality. The most effective option was the one with Azofoska applied in a dose of 15 kg and modified with BisolbiFit at the rate of 4 kg per one ton of fertilizers on all the backgrounds. The use of BisolbiFit both for the pre-sowing seed treatment and treatment of mineral granules, increased the NPK payback by the yield gain.