Abstract
To increase the production volume of planting material for ornamental plants in the conditions of Central Kazakhstan, the selection of pre-sowing treatment methods for seed material becomes relevant. The use of safe and effective germination activators accelerates the biological processes of plant growth. The aim of the research was to study the impact of physical methods on the germination of Catalpa speciosa seeds as relatively safe methods of seed material activation. The seed treatment was carried out in three ways: the effect of laser irradiation, magnetic fields for 24, 72 hours, and twenty-four-hour aeration. A different response of seedlings to physical factors of influence was noted. The effect of the magnetic field allowed to increase germination by an average of 10 % compared to the control group. The impact of laser irradiation for 1‒4 minutes on the growth of Catalpa speciosa seedlings was less significant. Aeration had a positive effect on the energy of seed germination. Thus, to increase the germination of seedlings during early sowings of Catalpa speciosa seeds, it is promising to use the influence of the magnetic field and aeration.