Abstract
The research was carried out in order to study the effectiveness of mineral fertilizer with microelements of Biochar-Agro Technical grade on spring rape crops on gray forest soils of the Republic of Tatarstan. Field experiments were conducted in 2023 on the basis of Agrobiotechnopark LLC (Narmonka village, Laishevsky Municipal District of the Republic of Tatarstan), laboratory analyses were carried out at the Center for Agroecological Research of the Kazan State Agrarian University. According to the research results, it was found that the application of Biochar-Agro fertilizer of the Technical brand contributed to an increase in the safety of plants for harvesting by 0.8 % compared with the control variant. In addition, the studied complex fertilizer contributed to an increase in the duration of the growing season of spring rapeseed. In the 10.0 kg/ha variant, the growing season was increased by 6 days. The height of the plants increases from 116.6 cm at the control, to 123.4 cm in the last version of the experiment, which is 6.8 centimeters higher than the control. In the variant Background NPK + Biochar-Agro brand: Technical (seed application, 10.0 kg /ha), the number of weeds per 1 m2 was 8.2 pcs., which is less than the control variant by 3.2 w. or 31.7 %. The maximum number of productive branches (5.5 pcs./plant) was formed on the variant of the near-sowing application of Biochar-Agro fertilizer of the Technical brand 10.0 kg/ha. The increase in the actual yield of spring rapeseed from the application of the studied preparation ranged from 0.23 to 0.49 t /ha, depending on the rate of application of Biochar-Agro brand fertilizers: Technical.
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