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All greenhouse phyto-irradiators implement a constant regime of plant irradiation. For example, phyto-irradiators turn on at 6 am and turn off at 10 pm. The article contains the results of a study of the influence of pulsed (flashing) light on the growth and development of meristemic plants of garden strawberry varieties ‘Brighton’ and ‘Korona’ in vitro. The ability to use flashing light is based on the features of photosynthesis, which includes light-dependent and light-independent (dark) reactions. A flashing LED phyto-irradiator and a continuously operating fluorescent irradiator (control sample) were compared. Experiments have shown that the use of flashing LED phyto-irradiator increased the rooting rate of strawberry micro-cuttings by 5-10%, depending on the varieties. For the variety ‘Korona’ there was an increase in the number of fully developed leaves to 7.2 pieces (6.0 pieces in the control sample) and, as a consequence, an increase in the leaf surface area of microplants from 262.2 mm2 to 348.0 mm2. For the ‘Brighton’ variety, everything was the other way around: under the flashing LED phyto-irradiator, the number of fully developed leaves decreased to 4.5 pieces (5.6 pieces in the control sample). The use of a flashing LED phyto-irradiator prevented the elongation of microplants in both varieties. At the end of the experiment, all strawberry microplants were rooted and met the standard requirements for rosette height, number of fully developed leaves, and root length.

The paper provides research and practice rationale for feasibility of using the complex probiotic preparations A2 and Immunoflor in the pig production and growing technology with the aim of improving reproductive qualities of sows through increasing nonspecific resistance of the organism. The probiotic preparations were given with the feed twice, at the beginning of pregnancy and 14 days before farrow, A2 in the amount of 1.62 g per animal in Experimental Group 1 and “Immunoflor” in the amount of 0.05 g per animal in Experimental Group 2. It was established that pig production from sows of both Experimental Groups 1 and 2 was 7.2 and 10.3 % higher, comparing that in the Control Group. At that, the number of healthy and viable pigs obtained from sows of the given experimental groups was reliably 8.5 and 12.5 % greater than in the Control Group (P < 0.01). The new complex probiotic agents A2 and Immunoflor, having significant antagonistic activity against putrefactive bacteria, decreased the mortinatality of pigs 1.4 and 2.1 times, respectively, increased litter size by 11.4 and 3.6 % and the milkability of sows by 4.2 kg and 4.7 kg.