Foliar fertilizing with multicomponent micro fertilizers effect on the pigment complex and soybean productivity

The purpose of the research is to assess the yield of soybeans when using foliar top dressings with water-soluble microfertilizers Lebozol-Bor and Revitaplant Legumes + NMgS in the soil and climatic conditions of the Lipetsk Region. An experiment to study the effect of water-soluble microfertilizers on soybean crops was carried out in 2019-2021 on the territory of the Lipetsk Region in the conditions of the experimental field of the Yerevan State University named after I.A. Bunin. The scheme of the experiment included: 1 - control (without treatment); 2 - Lebozol-Bor (1 l/ha); 3 - Revitaplant Legumes + NMgS (2 l/ha); 4 - Lebazol-Bor (1 l/ha) + Revitaplant Legumes + NMgS (2 l/ha). Plants were treated with fertilizer solutions in the soybean branching phase and in the budding phase - the beginning of flowering. The greatest effect of foliar dressings on the amount of photosynthetic activity was obtained in the variants where Revitaplant Legumes + NMgS was used in its pure form and mixed with the Lebazol-Bor fertilizer. Foliar feeding with multi-component micronutrient fertilizers had a significant impact on the growth and development of soybean plants. The tallest plants were formed in the Lebazol-Bor + Revitaplant Legumes + NMgS variant, where the average plant height was 105.3 cm, which is 10 cm higher than the control. The highest yields were obtained with a combination of paired application Lebozol-Bor + Revitaplant Legumes + NMgS - 1.26 t/ha. Correlation coefficients (r = 0.99) and determination coefficients (dyx = r2 = 0.98) indicate a strong relationship between soybean yield and pigment content in the studied options. It is assumed that a high effect of fertilizers was obtained by eliminating the deficiency of nutrients during the growing season.