from 01.01.2018 to 01.01.2019
Mytischi, Moscow, Russian Federation
Mytischi, Moscow, Russian Federation
Russian Federation
UDK 630 Лесное хозяйство. Лесоводство
We have improved the method of flotation of Siberian larch seeds. Larch is a promising breed for cultivation in the center of the European part of Russia, while its seeds are characterized by low seed fullness. The research process consisted in clarifying the bulk and true density of seeds, then we prepared alcohol solutions with a density close to or slightly less than the initial true density of seeds – they turned out to be ethyl and isopropyl alcohol (the change in alcohol density over 24 hours at a temperature of 20 ° C was taken into account). Next, it was necessary to find the optimal concentration of these alcohols, for this we calculated the relationship between the density of solutions and their volume concentration. Soaking was carried out for a different period of time, after which the percentage of surfaced and sunken seeds was determined. All seeds (both surfaced and sunken) it was determined for seed fullness by the method of cutting. According to the results of the study, it was possible to identify the optimal concentration satisfying the separation of seeds in ethyl and isopropyl alcohols, equal to 75%. The soaking time is recommended not to exceed 0.5 hours. In alcohols with a concentration of less than 75%, it is necessary to increase the soaking time of the seeds. Under equal conditions (concentration and soaking time), the seeds sink in isopropyl alcohol in greater quantities than in ethyl alcohol, since the latter has a lower density.
Larix sibirica Ledeb., Siberian larch, seeds, flotation, seed fullness, ethyl alcohol, isopropyl alcohol
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