Leaf fertilizing in the technology of cultivation of seed hemp in the conditions of the Middle Volga Region

Abstract

The research was carried out in order to study the influence of seeding rates and foliar treatment of cannabis plants in the Penza region. The scheme of the experiment included the following factors: seeding rates (factor A) - 2.0 million/ha, 2.5 million/ha, 3.0 million/ha and foliar fertilization of plants (factor B) - control (without treatment), Izagri Nitrogen (3 l/ha), Izagri Phosphorus (3 l/ha) were studied, Izagri Vita (1 l/ha), Humate +7 (1 l/ha). The soil of the experimental site is represented by leached, heavy loamy chernozem with a humus content of 4.6%. The treatment of vegetative plants with Izagri Nitrogen and Izagri Phosphorus preparations had a positive effect on the processes of growth, development and morphological signs. The height and technical length of the stem increased in comparison with the control, the length of the inflorescence was the greatest in the variants with the treatment of Izagri Nitrogen (84 cm) and Izagri Phosphorus (78 cm). The use of foliar spraying of cannabis crops with liquid fertilizers Izagri Nitrogen and Izagri Vita increased the yield of stems by 0.78-0.9 t/ha (5.3-6.1%), the total yield of fiber increased to 4.79-4.95 t/ha, and its content to 33.2-33.5% at 32.6% and 4.6 t/ha under control. Foliar spraying of cannabis Humate+7 crops at a rate of consumption of 1 l/ha provides a high seed yield of 1.08 t/ha at 0.90 t/ha under control.