Features of the formation of the grain corn yield using foliar feeding with organomineral fertilizers

The article presents the results of studies on the effectiveness of foliar feeding with organomineral fertilizers of the "Batr" group - Batr 40 Azot and Batr Zinc on corn grown for grain. The studies were conducted in the Predkama zone of the Republic of Tatarstan. The objectives of the studies included assessing the effect of foliar feeding with the studied fertilizers on the formation of the yield and grain quality in various corn hybrids. The objects of the studies were early-ripening hybrids DKS 3006 and KVS Lionel. Fertilizers Batr 40 Azot (nitrogen-containing liquid organomineral fertilizer with microelements, humates and hydroxycarboxylic acids) and Batr Zinc (liquid organomineral fertilizer with a zinc content of 5%) were used for processing. The studied variants included top dressing with only Batr 40 Nitrogen (rate of 4 l/ha) and tank mixture of Batr 40 Nitrogen (4 l/ha) + Batr Zinc (1 l/ha). Plants were treated in the phase of six leaves of the crop, with a working fluid consumption of 200 l/ha. Field experiments were carried out in 2022-2023, on medium loamy gray forest soil with low zinc content. In 2022, during the growing season, moisture conditions for the growth and development of corn were favorable, and in 2023, dry periods were observed. Foliar top dressing with Batr 40 Nitrogen, on average over the years of research, contributed to an increase in grain yield by 0.4 t/ha on the DKS 3006 hybrid and 0.3 t/ha on the KVS Lionel hybrid. The use of the tank mixture Batr 40 Nitrogen + Batr Zinc resulted in a yield increase of 1.0 t/ha for the DKS 3006 hybrid and 0.8 t/ha for the KVS Lionel hybrid. The absolutely dry biomass of corn plants before harvesting with the use of the Batr 40 Nitrogen fertilizer increased to the control values by 0.8 t/ha for the first hybrid and for the second hybrid, while with the use of the Batr 40 Nitrogen + Batr Zinc mixture the increase was 1.3 and 1.2 t/ha, respectively. Foliar feeding with the Batr 40 Nitrogen + Batr Zinc mixture resulted in an increase in the protein content for both hybrids. On the DKS 3006 hybrid, the protein content in dry matter of grain increased by 0.3%, and on the KVS Lionel hybrid – by 0.2%. The most significant positive effect of feeding on protein content was in the drier conditions of 2023. As a result of the studies, it was found that the best indicators for productivity and grain quality in both corn hybrids were obtained when using foliar feeding with a mixture of Batr 40 Nitrogen + Batr Zinc.