Effectiveness of using the new organic growth substance "Grivlag" on the productivity and morphological indicators of technical hemp varieties in the Krasnodar region

The article briefly describes the results of field experiments studying different doses of mineral fertilizers and a new organic growth substance of natural origin on sexual differentiation, leaf apparatus development, some morphological indicators and yield of three varieties of industrial hemp Cannabis Sativa L (dioecious variety «Ekaterininskaya», standard; dioecious variety «Victoria», fiber type; monoecious variety «Omegadar-1», oilseed type) in the soil and climatic conditions of the Krasnodar Territory during 2024-2025 in experimental fields belonging to the P.P. Lukyanenko Grain Center. The experiments established that the new growth substance (the preparation «Grivlag») is a promising means of regulating plant sex and increasing the productivity of industrial hemp, however, its application requires consideration of the varietal characteristics of the plants and the target direction of cultivation of zoned hemp varieties. In particular, experiments have shown that when applying complete mineral fertilizers N150P120K150 and the preparation «Grivlag» at a dose of 100 ml/ha, the variety «Ekaterininskaya» showed a stem yield of 20.3 t/ha, with a yield in the control plot (without fertilizers) of 13.0 t/ha; the seed yield in the experimental plot was 3.5 q/ha, and in the control plot (without fertilizers) 2.4 q/ha. The «Victoria» variety in the control plot (without fertilizers) showed a stem yield of 15.1 t/ha, and a seed yield of 3.5 q/ha, while in the experimental plots where the complete mineral fertilizer N150P120K150 was used, the stem yield was 23.2 t/ha and the seed yield was 4.7 q/ha, and where the «Grivlag» preparation was used at a dose of 100 ml/ha, the stem yield was 23.6 t/ha, and the seed yield was 3.3 q/ha. The «Omegadar-1» variety in the control plot (without fertilizers) showed a stem yield of 7.2 t/ha, and a seed yield of 6.4 q/ha; In the experimental plot where the complete mineral fertilizer N150P120K150 was used, the obtained stem yield was 8.6 t/ha, and the seed yield was 12.2 q/ha; in the experimental plot where the preparation «Grivlag» was used at a dose of 100 ml/ha, the obtained stem yield was 7.6 t/ha, and the seed yield was 12.5 q/ha; at a dose of 200 ml/ha, the obtained stem yield was 8.6 t/ha, and the seed yield was 15.6 t/ha; the study of the preparation «Grivlag» for industrial hemp requires taking into account varietal characteristics and precise dosing.