SOME RESULTS OF ADAPTIVE TECHNOLOGY STUDYING OF SUGAR SORGO CULTIVATION IN THE FOREST STEPPE OF THE MIDDLE VOLGA REGION
The article presents the obtained and approved results of three-year studies of sugar sorghum growing in the Western Zakamye region of the Republic of Tatarstan, in a territory with a more arid climate. Sugar sorghum is known to be the most drought-resistant crop. In order to maintain stable cattle breeding over the years, it is necessary to have a stable field fodder production. The research was carried out on leached non-black earth. The seeding rate is 300 thousand pieces / ha of germinating seeds, the depth of seeding is 5-6 cm. Mineral fertilizers were applied after harvesting the previous crop for the main tillage. According to the data of the meteorological station in Chistopol, the vegetation conditions of sugar sorghum during the years of the study were close to the average long-term values. Sowing dates and backgrounds of mineral nutrition influenced both the duration of the growing season and the formation of the yield: N60P60K60. The duration of the growing season averaged 113 days over three years, which is 9 days more than in the control. The variant of the mineral background with N80P80K80 increased the growing season by 15 days in comparison with the unfertilized variant of the experiment. The creation of the background of mineral nutrition N60P60K60 in the second period of sowing sorghum made it possible to obtain an increase in the yield of fodder mass from 6.6 to 8.0 t / ha. The application of mineral fertilizers in a dose of N80P80K80 provided an increase in yield from 10.8 to 15.4 t / ha.