Abstract
In the Novgorod region, the effectiveness of the integrated use of new microbiological preparations of Azotovit, Phosphatovit and mineral fertilizers has been investigated. The purpose of the experiment was to increase the yield of green mass of oatmeal mixture. Field experiment took place in 2017-2019 on sod-podzolic light loamy, clay-laden soil. Of the varieties recommended for cultivation in the North-West region, the following objects of research were used: spring vetch Lyudmila and oats of spring variety Borrus. Three methods of applying micronutrient fertilizers were tested: presowing treatment of seeds; foliar treatment in the phase of branching the wiki and tillering of oats; seed treatment presowing + foliar in the phase of branching the vetch and tillering of oats on two backgrounds of mineral nutrition - background 1 – N82P105К70 and background 2 – N41P53К35. The highest yield of green mass of oatmeal mixture (on average over 3 years) – 42.4 t/ha (6.8 t. units/ha) and digestible protein of 0.85 t/ha were obtained with a dose of mineral fertilizers per calculated yield N82P105K70 during seed treatment before sowing with microbiological fertilizers (Azotovit, Phosphotovit), as well as spraying the ground vegetative part of the vetch (in the branching phase) and oats (in the tillering phase). Doses: Azotovit –1.0 l/ha + Phosphotovit – 1.0 l/ha. At the same time, the energy intensity of production of one ton of feed units in this embodiment was 2.2 GJ. In addition, energy efficiency was 4.7 units, and the increase in soil energy potential was 15 GJ/ha.
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