DYNAMICS OF SHEET SURFACE AREA OF PEAS DEPENDENCE DEPENDING ON VARIETY FEATURES, SOIL LIMITATION AND NUTRITIONAL SYSTEM

The article presents the results of research on the influence of varietal characteristics, soil liming, fertilizers on the formation of the leaf surface area. The use of microfertilizers Vuxal Extra CoMo for pre-sowing seed treatment, foliar fertilization with microfertilizers Vuxal Microplant during vegetative growth and Vuxal Calcium, Boron during budding provided against the background of control of increasing leaf area by increasing vegetative growth and surface growth rate -37% depending on the stage of plant development in vegetable varieties Skinado and Somerwood. Limeing also helped to increase the leaf surface area of plants from 2.5 to 7.8% depending on the phase of development, in our opinion due to the indirect effect on the reaction of soil solution and improving nitrogen fixation processes in the soil. The highest index of leaf surface of vegetable pea varieties was observed in the experimental variants, where against the background of control pre-sowing treatment of seeds with microfertilizer Vuxal Extra CoMo, foliar fertilization with microfertilizers Vuxal Microplant during vegetative growth and Vuxal Calcium, Boron, which changed from budding 1.15 to 1.17 in the Skinado variety and from 1.19 to 1.22 in the Somerwood variety. This was subsequently reflected in the indicators of the leaf index in the phase of flowering and bean formation. Leaf index in the phase of flowering and bean formation varied in Skinado variety from 1.58 to 1.59 and from 1.60 to 1.64.In the Somerwood variety in these phases, the leaf surface index was higher and varied from 1.64 to 1.68 in the flowering phase, and in the bean formation phase from 1.67 to 1.73. The content of chlorophyll in the leaves of vegetable peas largely depended on the phase of plant development, as well as the action of trace elements during seed treatment, foliar fertilization, and liming.