PRODUCTIVITY IN TOMATO PRODUCTIVITY WITH APPLICATION OF MICROELEMENTS AND BIOLOGICALLY ACTIVE SUBSTANCES

The modern technologies for production of high yield in vegetable crops in agroindustrial complexes provide the development of optimal conditions for plant nutrition including the application of microelements and biologically active substances (BAS). The study of productivity in tomato with application of microelements and biologically active substances were carried out in unstable moisturization in Stavropol region at the facilities of Educational and Experimental Station FSBEI HE Stavropol SAU in 2015-2016. The aim was to study productivity in tomato with application of microelements and biologically active substances on the basis of calculated norms of fertilizers. The objects of the study were tomato hybrid ‘Premium F1’, Agromix, and different BAS. Calculated dose of fertilizers on predicted tomato yield of 80 t/ha according to experimental protocol was N130Р150К170, where this norm was regarded as a control. Mineral fertilizers were added to basic fertilizer and included as extra feeding supplied through drip irrigation system. Agromix was applied as part of foliar dressing through drip irrigation, while BAS was used only as foliar dressing. The data on development of vegetative and generative plant organs, biochemical composition and yield characteristics of tomato fruit were analyzed. As a result of the study, it was shown that experimental tomato plants significantly differed from control ones not only by yield capacity and quality, but also the morphological characteristics. With application Agromix and BAS the area of leaf surface, stem diameter, degree of fruit formation, average fruit weight increased by 0.004-0.04 m2, 0.2-0.3 cm., 39%, and 8-16 g., per plant respectively. With application of N130Р150К170, Agromix, amino acids and epibrassinolide in different combinations, the dry matter content in fruit, sugar content, sugar and acid index and vitamin C content were increased as compared with control by 0.07-0.15%, 0.12-0.26%, 1.21.7 and 0.6-1.3 mg %, respectively, while nitrate content was decreased by 14.0-17.5 mg/kg. Application of microelements and BAS in the system of tomato plant nutrition increased tomato yield by 0.6-4.3 t/ha as compared with control variant. The highest yield was obtained in the experiment with combined application of N130Р150К170, Agromix, amino acids and epibrassinolide in plant feeding system. As a result of study, it was shown that highest productivity in tomato was obtained with combined feeding with microelements and BAS on the basis calculated norms of fertilizers.