Role of microbiological fertilizer and siderates in increase productivity and quality of potato
<em><strong>Results of researches on management of potatoes productivity by means of siderat, the mineral and bacterial fertilizers received in three short-term experiences from 2010 for 2017 are presented. Purpose of researches: to increase productivity and quality of potatoes at simultaneous decrease in anthropogenous loading on agrocenosis due to complex use of binary siderat, the lowered doses of mineral fertilizers in a combination microbiological medicines. In stationary field experiment (2010-2012) the maximum potatoes productivity (32,2-35,5 t/ha) was received from using mineral fertilizers N<sub>45-90</sub>P<sub>60-120</sub>K<sub>60-120</sub> in a crop rotation link [(radish olive + vika) - potatoes], at the same time efficiency of prelanding processing of tubers bacterial medicines was 9,2-15,0%. In experiences on the sod-podsolic soil an increase of potatoes productivity (variety Udacha) from microbiological medicine (Agrinos) in 2015 made 12,4%, at simultaneous increase in starch and vitamin C in production; in rather damp 2016 and 2017 an increase of efficiency of middle-early variety Gala reached 8,5 t/ha or 24,5% to the level of mineral background (N<sub>90</sub>P<sub>90</sub>K<sub>90</sub>). In option with the dose of NPK lowered by 30% and Agrinos application [N<sub>60</sub>P<sub>60</sub>K<sub>60</sub> + Agrinos A + B (5 + 2,5 l/ha)]: level of productivity was on 5,8 t/ha (16,7%) above full dose of NPK, along with it are noted: high content of starch and vitamin C, excellent culinary qualities, low level of nitrates; the conditional income for 69,5 thousand rub/ha above NPK background, low prime cost (4,33 rub/kg), high payback (5,55) and profitability of production of 131%.</strong></em> <p><em><strong> </strong></em>