THE EFFECTIVENESS OF THE USE OF NEW TYPES OF ORGANIC FERTILIZERS AND BIOLOGICAL PRODUCTS ON POTATO PLANTINGS IN THE CONDITIONS OF THE SOUTH-EAST OF KAZAKHSTAN

The scientific article was prepared based on the results of research that was carried out within the framework of the project "Organic production of potatoes and root crops (carrot and beet) based on the use of adaptive eco-friendly varieties and biologization of agricultural technology of crops in the conditions of south-east Kazakhstan". The research was carried out according to the methods generally accepted in vegetable growing and agrochemistry. In the conditions of dark chestnut soils of the foothill zone of the south-east of Kazakhstan, the effectiveness of new types of organic fertilizers and biological products on potato was studied. The importance of various bio-organic fertilizers in the production of organic potatoes was evaluated. In field experiments with potatoes, the effect of organic fertilizers, biofertilizers and biostimulants produced in Kazakhstan and foreign countries on the yield and quality of tubers was revealed. The scientific article presents experimental data for 2021-2022. It is established that the studied biofertilizers have a positive effect on the growth processes of plants. Intensive development and formation of a powerful biomass of potato plants is noted. There was an improvement in the quality of products due to a decrease in the content of nitrates. Bioorganic fertilizers and biologics increased potato yields by 12.50-88.09% (2021) and by 17.39-87.50% (2022). The nitrate content in potato tubers fluctuated markedly depending on the types of fertilizers used. Minimum levels of nitrates (60-84 mg/kg) were observed in crops grown with the use of new biofertilizers - StresStop, Wormi, MEGAVit and BioZZ. The lowest nitrate content in potatoes (49 mg/kg) according to experience was on the variant where 100% organic fertilizer Terra Sorb foliar was used at a rate of 3 l/ha (3-fold).