{"id":6279,"date":"2020-06-19T09:39:53","date_gmt":"2020-06-19T06:39:53","guid":{"rendered":"https:\/\/visnyk.mnau.edu.ua\/?p=6279"},"modified":"2020-07-20T13:00:17","modified_gmt":"2020-07-20T10:00:17","slug":"n105v1r2020antipova","status":"publish","type":"post","link":"https:\/\/visnyk.mnau.edu.ua\/en\/n105v1r2020antipova\/","title":{"rendered":"L. Antipova. Hay yield of alfalfa varieties depending on weather conditions and the application of the growth-regulating drug Emistim C"},"content":{"rendered":"UDC <\/strong>633.311: 631.8<\/p>\n

 <\/p>\n

L. Antipova\u00a0<\/strong><\/p>\n

 <\/p>\n

The purpose of the research<\/strong> is to determine the influence of the plant growth regulator Emistim C on the hay yield of alfalfa varieties in the dry Black Sea Steppe zone.<\/em>
\nMaterials and methods of research.<\/strong> The studies were conducted during 2014-2016 at the Mykolayiv National Agrarian University. The following varieties of alfalfa were sown in early spring without applying coverless varieties: Nadezhda (control), Vinnichanka, Regina, Sinyukha. The counts and observations in the experiments were carried out according to generally accepted methods.<\/em>
\nResearch results. <\/strong>It was established that the duration of the sowing-seedling period was 25-26 days when sowing with untreated seeds, and when treating seeds with Emistim C it decreased to 22-24 days. The duration of interphase periods of plant growth and development was adjusted both by the use of Emistim C and by weather conditions. Field germination also varied depending on the alfalfa variety and the seed treatment with Emistim C. In the control variant (Nadezhda), this indicator was 49.5%, while in the Regina variety, compared to other varieties under study, it was the highest (50.9%). Significant improvement in field germination was observed in crops treated with Emistim C: 58.9-60.8% of plants sprouted. With regard to the reaction of the varieties to the indicated drug, the indicator for the Nadezhda variety increased against the control (the corresponding variety without seed treatment) by 19.0%, Sinyukha by 17.5%, Regina by 18.7%, and Vinnichanka by 20.6%. Alfalfa productivity in the first year of life, on average across varieties, increased as a result of the use of Emistim C for seed treatment from 2.29 to 2.56 t \/ ha, or by 11.8%. There was no significant difference between the studied varieties in terms of hay yield. Thanks to seed treatment with Emistim C, this indicator increased by 0.27 t \/ ha, or 11.8% against the control (cultivar Nadezhda), by 9.5% in the cultivar Vinnichanka, and by 14.8% in the cultivar Regina. Among the varieties, the increase in hay yield ranged from 2.23 to 2.50 t \/ ha for Vinnichanka, from 2.36 to 2.62 t \/ ha for Regina, and from 2.30 to 2.55 t \/ ha for Sinyukha.<\/em>
\nConclusions.<\/strong> Weather conditions and seed treatment with Emistim C significantly affect the formation of alfalfa productivity in hay. There was no significant difference in yield between the studied varieties. The duration of the sowing-seedling period during seed treatment with Emistim C, depending on the variety, decreased by 2-3 days. At the same time, stress for alfalfa plants of high temperatures decreased, which extended the growing season by 1-3 days. The field germination of alfalfa varieties increased from 17.5% (Sinyukha) to 20.6% (Vinnichanka). When sowing with untreated seeds, the yield of hay of the grade Nadezhda (control) was 2.28 t \/ ha. Thanks to seed treatment, this indicator increased by 11.8%. In relation to varieties, the increase in the yield of hay from Vinnichanka was 12.1%, Regina 11.0%, and Sinyukha 10.9%.<\/em><\/p>\n

Key words: <\/em><\/strong>alfalfa, hay, weather conditions, plant growth-regulator Emistim C, variety, yield.<\/em><\/p>\n

References:<\/strong><\/p>\n

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