PECULIARITIES OF SWITCHGRASS SEEDS LABORATORY SIMILARITY DETERMINATION (PANICUM VIRGATUM L.)

• Main Author: Doronin V. A.
• Format: Article
• Language: English
• Published: Uman National University of Horticulture 2019-06-01
• Series: Вісник Уманського національного університету садівництва
• Subjects: bed wetting; cooling time; vegetation; germination
• Online Access: http://visnyk-unaus.udau.edu.ua/assets/files/articles/2019/2/5.pdf
• ISSN: 2310-046X; 2310-0478

The article deals with the peculiarities of switchgrass seeds germination, which ensure a decrease in the state of its biological rest and, accordingly, a laboratory similarity increase. The insufficient and excessive moistening of the bed for switchgrass seeds germination affected on the intensity of its germination, but was not decisive for a significant decrease in its dormancy and increase in the number of sprouted seeds was found. Significant influence of germination temperature on the germination intensity of switchgrass seeds was established. At the same time, when the seeds germinate at a constant temperature, it germinated more intensively than at a variable temperature. If, on the seventh day, 12 seedlings were obtained at a constant germination temperature of 20 °C without first cooling, then no seedlings were observed at the variable germination temperature for that day, as well as for 10th day (germination energy). Seeds pre-cooling reduced temperature of 10 °C for 14 days and subsequent germination at a constant temperature of 20 °C provided a reduction of the resting state of the seed and increase the intensity of its germination on the 10th day from 15 to 61%, but with this method of reducing the biological Seed germination of seeds can be obtained in 34 days. Therefore, research was conducted with the switchgrass seeds of different years of culture sowing to improve the existing method of germination. It was found that the germination energy and seeds similarity depended more on the years of sowing of the switchgrass than on the term of seeds cooling before germination. An average of 24 experiments did not reveal a significant difference from the number of switchgrass germinated seeds for cooling it for 7 days and germination at 20 °C, compared to control - cooling for 14 days.