The influence of physical factors on the germination of seeds and the development of three-year-old seedlings of broad-scaled larch (Larix × eurolepis Henry.)

This article presents information on the influence of pre-sowing treatment of Larix × eurolepis Henry. seeds by physical factors, such as atmospheric pressure dielectric barrier discharge plasma (DBD), low-pressure high-frequency discharge plasma (HF), high-frequency electromagnetic field (HF EMF), and placing seeds in a vacuum environment on seed germination and the morphometric parameters of 3-year-old seedlings.

A stimulatory effect on the germination of Larix × eurolepis seeds was observed, which depends on the specific treatment factor and the duration of exposure.

Treating the seeds with physical factors affected the growth and development of seedlings. Treating the seeds with atmospheric pressure dielectric barrier discharge plasma (DBD) for three minutes was observed to have the most significant impact on growth, crown diameter, needle length, and plant height, which reduced those parameters by more than fourfold. This seed treatment can be utilized for breeding purposes to obtain dwarf plants.

It was found that there is considerable variation in needle color among seedlings, particularly evident when seeds are placed in a vacuum environment for 15 minutes. In addition to typical light green needles, seedlings with various combinations of green, white, gray, and blue colors in their needle coloration were observed.

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