Changes in the parameters of photosynthetic maize activity with applying micronutrient fertilizers

Abstract

The most important factor that determines the yield of agricultural crops is mineral nutrition. It is important to supply the plants in the required amount and the optimal ratio of basic nutrients and microelements. Foliar treatment is the most rational way to apply micronutrient fertilizers. The current research aimed at examining the species (Azosol 36 Extra, 3.0 l/ha; Aquarin 5, 3.0 l/ha) and the terms of application (5 maize leaves; 8 maize leaves; 5 leaves + 8 maize leaves) of micronutrient fertilizers, depending on the early ripening of the hybrid, providing the formation of the best indicators of photosynthetic activity, was carried out on leached heavy loamy chernozem. When foliar treatment of an early ripe hybrid with Azosol 36 Extra solution, the increase in the total leaf surface of sowing in relation to options with water on a natural agro background was 3.0%, and from Aquarin 5-9.1%, and for the mid-early, the increase was 4.3 and 6.9%, respectively. Against the background of N110P70K40, the gains varied from 4.0 to 5.9%, but no significant advantage, both types of micronutrient fertilizers and in terms of foliar treatment, was not revealed. The use of Azosol 36 Extra on the natural agro background promoted an increase in the total photosynthetic potential by 2.7-4.1% compared to the treatment with water, the effect of Aquarin 5 was more effective, the increase was 6.9-8.9%. With the improvement of root nutrition conditions, the increase from Azosol 36 Extra was obtained a bit more - 4.1 -5.8%, and from Aquarin 5, on the contrary, less (3.7-5.6%). Variants with foliar treatment with Azosol 36 Extra in the phase of eight leaves and double application, the increase varied from 7.5-7, 9% on a natural agricultural background to 13.2% on an improved one. Aquarin 5 had a better effect on plants during foliar treatment in the phase of five leaves of maize, but the increase was 2.7-8.5%.