SOME TECHNOLOGICAL ASPECTS OF SUDAN GRASS CULTIVATION FOR SEEDS IN A DRY-STEPPE AREA OF BURYATIA
The results of research on the development of some elements of the technology of cultivation of Sudan grass for seeds are shown. The research work was carried out on the experimental plot of the Buryat station on grasses in the soil and climatic conditions typical for the dry-steppe zone of Buryatia. The following elements of Sudan grass cultivation technology were studied: varieties, sowing dates and seeding rates. Field germination significantly increased at a later time of sowing. The germination of crops on May 30 and June 10 increased by 1.5-2.0 times as compared with the sowing on May 20. As the seeding rate increased from 1.0 to 2.0 and 3.0 million units / ha for all studied varieties of field germination is slightly reduced (by 2-4%), which is within the error of experience. Mathematical processing showed that the difference in field germination was significant both in terms of sowing - 19-22, and in seeding standards - 18-25 pcs. per 1 m2, depending on the variety. The highest tillering energy was recorded at a seeding rate of 1.0 million pcs. seed germination per 1 ha and sowing time on May 30. Productive tillering was higher at the earliest sowing - May 20 and slightly decreased when sown on May 30. Regardless of the variety, a significant increase in seed productivity was observed with an increase in the seeding rate from 1.0 to 3.0 million pcs / ha. The optimal sowing time for the studied varieties is May 30. The highest yield of seeds was obtained with a sowing period of May 30 and a seeding rate of 3.0 million units per hectare from crops of the Kamyshinskaya 51, 9.1 centners per hectare and Kinelskaya 100- 7.8 centners per hectare. As a result of the research, the main elements of the technology of cultivating Sudan grass for seeds for the soil and climatic conditions of the dry-steppe zone of the Republic of Buryatia have been developed.