Seed treatment before sowing is the basis for increasing sowing qualities, stable development and resistance of seeds to harmful organisms. Greening of production processes of forestry makes it necessary to find new methods of pre-planting treatment, which include electric impact on planting material. For the first time, materials are presented on the study of the effect of an electric field of high voltage alternating current on Robinia pseudoacacia L. seeds with the identification of optimal exposure modes that increase the sowing and growth properties of seeds.

In maintaining the material and energy balance of dry-steppe and semi-desert ecosystems, the main active component is forest-reclamation complexes of various purposes. In addition to environmental stabilization and other economic functions, protective plantings are also reserves of regional biodiversity. Research was carried out on permanent test sites in dendrological collections and protective forest stands of the Federal Research Center of Agroecology of RAS, as well as in recreational and landscaping plantings using route and stationary methods in different types of forest plantations that differ in condition, level of anthropogenic impact and maintenance regime. The assessment of the forest pathology status of stands was carried out using standard methods and in accordance with the current guidelines for forest pathology survey of plantings and forest pathology monitoring. It was found that in the spectrum of the examined plants, the most prosperous state of the dendroflora is distinguished by arboretums and forest belts. Urban plantings are dominated by severely weakened and shrinking trees (up to 80.0%). The main pathologies in them were shrunken tops and skeletal branches, xylophages, diseases of foliage, wood and trunks. The least pronounced anomalies of woody plants in forest belts (10.7-22.0% lower than in other types of plantings).

The use of planting material with a root-balled tree system is one of the promising directions for creating artificial plantations. It is associated with radical changes in the cultivation of planting material and significant changes in the forest crops production technology [1]. The technology of widespread, woody plants year-round cultivation in the artificial environment can be implemented by using small-sized forms of cultivation structures - irradiation chambers and cabinet units, grow boxes, phytotrons, etc. In this case, the main technological operation is the light regime necessary for plants: with the radiation spectrum necessary for their development and growth, with the required intensity and irradiation regime. The results of photobiological studies on the qualitative indicators of woody plants grown in phytotron conditions under irradiation by radiation with different proportions in the blue-red and blue-green-red ranges of the photosynthetically active radiation zones are presented. The photosynthetically active radiation spectral variants, providing the highest or extremely close to it productivity of the indicated crops, were established. The complex and ambiguous nature of the photosynthetically active radiation main spectral ranges influence on the photoenergy and photoregulatory processes in plants, which ensure their productivity, is indicated, which makes it impossible to determine the general unified requirements for the artificial irradiation optimal parameters for growing plants.

The work contains the results of research carried out in 2015…2017, the seeds pre-sowing treatment methods influence in the alternating voltage electric field with the intensity of 8 kV/cm with an exposure of 60 seconds, by a Zerebra Agro growth regulator with an aqueous solution of 100 ml/1 liter of water. The decrease in the period from sowing to germination by 1 day, the decrease in the duration of the germination phase - basket formation by 3…5 days in the NK Neoma hybrid, by 1 day in the LG 5550 hybrid, by 2 days in the EU Petunia hybrid was established. The duration of the basket formation phase - flowering in the NK Neoma hybrid increased significantly in the EU Petunia hybrid by 6…7 days, not significantly in the LG 5550 hybrid by 1 day. The flowering-maturation phase lasted 51…56 days for the NK Neoma hybrid, 49…52 days for the LG 5550 hybrid, and 42…46 days for the EU Petunia hybrid. The duration of the germination-maturation phase in the NK Neoma hybrid increased by 2…3 days, in the LG 5550 hybrid by 2…3 days.

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