IMPROVEMENT OF TECHNOLOGY ELEMENTS FOR CULTIVATION OF EARLY POTATO VARIETIES IN IRRIGATED CONDITIONS OF THE TERSKO-SULAK SUB-PROVINCE OF THE REPUBLIC OF DAGESTAN
The article presents the results of studies on the study of the adaptive potential of early potato varieties, against the background of the introduction of biohumus and treatment with growth regulators. The experiments were carried out in 2018-2020 on light chestnut soils of the peasant farm "Umagadzhiev Imalmakhsud Magomedovich", located in the Babayurtovsky district of the Republic of Dagestan. In the course of the conducted research, the following was established. Compared with the control variant, on average for varieties, the leaf surface area when treated with the Zircon growth regulator increased by 10.4%, and against the background of the Extrasol regulator - by 8.0%. The introduction of vermicompost with a rate of 7.5 t / ha contributed to an increase in this indicator by 14.5%. The greatest increase in leaf area was noted with the combined use of biohumus and the growth regulator Zircon, the excess in this case was 19.1%. A sufficient significant increase in this indicator, at the level of 17.1%, was also noted in the variant with the use of vermicompost and the growth regulator Extrasol. Among the studied varieties, the largest leaf area was formed by the Zhukovsky Early variety; rather high data were also observed in the Predgorny variety. The studied varieties the highest yield, at the level of 34.8 t / ha, was provided on the variant with the introduction of vermicompost and treatment with the growth regulator Zircon. Sufficiently high and approximately the same yield data (30.6-32.3 t / ha) were also observed on plots with the introduction of only vermicompost with a rate of 7.5 t / ha and the combined use of vermicompost and the growth regulator Extrasol, which is higher than the control data, respectively, by 18 , 1 and 24.7%. Among the studied varieties, the Zhukovsky Early variety provided the highest tuber yield. Quite high data were also recorded for the Predgorny variety.