Some biological features of erva wooly seeds

Abstract

Some morphological features and quality of Erva woolly seeds were revealed. The sizes of the seeds of the NBG’s reproduction in 2018 varied within 0.6-0.8 mm, with a mass of 1000 seeds being 0.083-0.086 g. Seeds obtained under the conditions of the Southern Coast of the Crimea are characterized by a long germination period of 22-29 days. Laboratory germination at variable temperatures amounted to 64.3%, field under the condition of surface seeding with rolling 46.7%. Seeds are half-burned according to the I.V. Borisova classification of types of seed germination belong to the second type, a subtype with slow germination and a maximum of germinated seeds in the middle of the germination period. It was established that for the germination of Erva woolly seeds, an air temperature above 20°C is necessary. The lowest seed germination rate was obtained when they were germinated at a constant temperature of 20°C. Dry heating of seeds during the day before sowing had no effect. Seeding of seeds cleared of pericarp to a depth of not more than 1.0 cm results in sparse seedlings in comparison with surface sowing. Sowing seeds with pericarp can provide optimal plant density, both in the conditions of surface sowing and with the incorporation of seeds into the soil.