The influence of biological products on economically valuable indicators in the production of tomatoes of domestic selection in open ground conditions of the Republic of Dagestan

Relevance. Tomato occupies a special place among vegetable crops in the world, including in the Republic of Dagestan. The article presents the results of research on the use of biostimulators of growth on the productivity of tomato plants in open ground conditions of the Tersk-Sulak subprovincion of Dagestan. The purpose of the study was to evaluate the effectiveness of the use of the biological product Relict R and Humate+7 on economically valuable indicators in the production of tomatoes of domestic selection in open ground conditions. Tomatoes were grown using conventional technology in open ground conditions.   Material and methodology. The research was carried out on the basis of the Tersko-Sulak subprovince of the Federal Agricultural Research Center of the Republic of Dagestan of the Kizlyar district. The soil of the experimental site is alluvial-meadow, medium-saline, medium loamy in mechanical composition. Agricultural technology is generally accepted in the Republic of Dagestan for tomato culture. The objects of research were tomatoes of the Voskhod VNIISSOKa variety, Relict R, Humate+7.   Results. The use of humic preparations accelerated the duration of the interphase period of germination-maturation, the difference in variants ranged from 6 to 11 days. The yield of tomatoes has shown that the use of biostimulants of growth gives a significant increase. Relict P turned out to be the most effective – the increase was 4.1 t/ha. The effectiveness of Humate+7 also exceeded the control yield and amounted to 2.3 t/ha, respectively. The use of the biopreparation stimulated the accumulation of dry substances in tomato fruits from 5.9 % in the control to 6.4-6.9 % in the experimental versions, the sugar content increased by 0.2 %. The studied preparations had a positive effect on the yield and quality indicators of tomatoes. According to the research results, it is recommended to use the Relict R – liquid humic preparation on tomato to increase yields and quality indicators in the conditions of the south of the country.