EVALUATION OF THE EFFECT OF COMPLEX GROWTH STIMULATORS ON SOME PHYSIOLOGICAL INDICES AND PRODUCTIVITY OF WHITE LUPIN

The article presents the test results for the study of the effect of complex growth stimulators Vitazim, Phytactive Vita, Zerebra Agro on dry matter synthesis, pigmentation system and productivity of white lupin (Lupinus albus L.) varieties under soil-and-climatic conditions in the South-West part of the Non-Chernozem zone in 2020-2022. In the field experiment the effect of leaves treatment on plants’ productivity development at the stages of three true leaves and of the bud formation was studied. As research objects the varieties Pilgrim and Alyi parus were used. The common used methods were used to determine the studied characteristics. The growth stimulators had positive action on dry mass accumulation of plants organs. The average three-year data suggested the maximal increase of dry mass of leaves, stems and root system at the dove-brilliant stage if Zerebra Agro and Phytactiv Vita have been applied. The positive correlations (r=0.72; p=0.000; r=0.92; p=0.000) between the accumulation of dry leaves’ and root system’s mass of tested varieties were revealed. The stimulating effect of the tested chemicals was expressed in the activation of photosynthetic pigments’ biosynthesis in leaves. The increasing of the total content of chlorophyll a+b of the var. Pilgrim made 26.2 ….27.8% and 27.6…34.5% of the var. Alyi parus compared to the standard. Phytactive Vita provided the maximal increase of the mentioned character for both varieties. The chemical Zerebra Agro had the effect on the increase of carotenoids’ content for both varieties most of all. The increase made 29.4% and 27.1% for the var. Pilgrim and for the var. Alyi parus respectively compared to the standard. The results demonstrated that Phytactive Vita was the most effective for development of the highest grain productivity regardless of the variety. Its use increased plants’ productivity of the var. Pilgrim by 13.6% and of the var. Alyi parus – by 21.3% compared to the standard.