Influence of plant density and biological products on the formation of seed yield of maize lines under irrigation conditions

Treatment with biological products resulted in an increase in the area of the assimilation apparatus by 1.7 to 2.4 thousand m²/ha.The application of Bio-gel led to an increase in leaf surface by 1.7 thousand m 2 /ha or 5.3%, and the treatment with Helafit combi by 2.4 thousand m 2 /ha or 7.5%. The treatment with biological products contributed to an increase in photosynthetic potential by 5.1% compared to the treatment with Bio- gel and by 7.2% compared to the treatment with Helafit combi. It was found that the treatment of parental lines with Bio-gel and Helafit combi caused an increase in laboratory germination of seeds. When using Bio-gel, the laboratory germination rate increased by an average of 1.5%. The treatment with Helafit combi was more effective, as the germination rate in this experimental variant increased by 2.4%. The increase in laboratory germination was observed due to a decrease in the infection of seeds of the lines by Fusarium moniliforme Scheld. The maximum seed yield in the early maturing line - the parent component of DK 281 was recorded at a density of 90 thousand plants/ha and treatment with Helafit combi - 3.65 t/ha. The maximum yield in the line - the parent component of DK 247 was observed at a density of 80 thousand plants/ha and treatment with Helafit combi - 4.89 t/ha. The medium-late line - the parent component DK 411 showed the highest yield at a density of 70 thousand plants/ha and treatment with Helafit combi - 4.65 t/ha. The maximum yield in the experiment was observed in the line

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