Изучения влияния применения биопрепаратов и стимуляторов роста на полезную микрофлору и продуктивность картофеля

Abstract

In field experiments (2016-2017), pre-sowing treatment of potato tubers with complex preparations based on associative rhizobacteria, growth stimulants and micronutrients was studied. The average yield increase amounted to 5.1-8.0 tons per hectare with a decrease in tuber infection with fungal diseases. The effectiveness of biologics varied over the years depending on the activity of nitrogen-fixing microorganisms and the external conditions. The number of microorganisms assimilating nitrogen in the mineral form increased in the variants with preparations Gumi 20 and Mival-Agro by 71-100%, oligonitrophils - by 2-3 times relative to the control. Significantly compared with the control when making drugs, the number of soil fungi increased by 1.5-6.5 times. Processing of tubers with biologics increases the number of seed tubers in the crop, a higher reproduction rate of 1: 8 was obtained on variants with Rizoagrin and Mival –Agro. The greatest effect was obtained from the use of humic fertilizers and silicon organic biostimulator Mival-Agro. Marketability of tubers increased by 1.5-6.5%. Under the influence of bio-fertilizers, an increase in the number of microorganisms in the rhizosphere of potatoes was observed by 42-92% relative to the control.