PRODUCTIVITY OF COMB SHANDRA DEPENDING ON THE TIME OF SOWING
Problem and goal. The purpose of this study is to study biometric indicators and indicators of seed and nectar productivity at different sowing dates of Shandra combata (Elsholzia cristata) in the conditions of the Central part of Russia, namely, the Ryazan region. Methodology. To achieve the goal of the study and answer the research questions on the study of Elsholzia cristata (Shandra combata) was laid in October 2018 on an experimental collection plot of GNU FNTS "Beekeeping" method of systematic repetition in accordance with the methodology of experimental work in crop production. The seeding rate of comb shandra is 6 million pieces. germinating seeds per hectare with a wide-row method of sowing - 45 cm. The soil is gray forest, heavily loamy, the humus content is 4.26 %. Conducting field experiments was accompanied by appropriate observations, records, measurements and analyses according to the experimental case methodology. The area of the accounting plots is 10 m2, the repetition is fourfold. Studies on the determination of sugar productivity were carried out in the laboratory of the direction of rational use of honey-bearing resources and nature management. Statistical processing in the experiments was carried out according to the method of B. A. Dospekhov Results. The results of the present study showed that when harvesting the seeds of Shandra combata, the plants were mowed in the phase of waxy ripeness, followed by maturation of the seeds. At a later harvest of plants, the process of shedding was observed. The growing season of the crop was 115-136 days. The average yield of shandra seeds was 27.1-84 kg /ha. Sugar productivity varied from 11.93 to 50.40 kg /ha. Conclusion. As a result of the study, it was found that the maximum seed yield was obtained with early spring sowing and is 84 kg / ha, and the highest nectar productivity was obtained with late spring sowing. It is 50.4 kg / ha. The early spring sowing period is optimal. Shandra crested proved to be a valuable honey plant in the second half of summer, with a long flowering period from the beginning of August to the second decade of September