Radical changes in the climate of planet and the transition of Ukrainian economy to digital format require the use of modern technologies in the field of plant selection. In the conditions of fast-changing ecological and economical situations search and realization of express-methods of creation of varieties of different directions of economic use is recognized as expedient. Establishing the possibility of using the latest IT- technologies in the study of biological processes, including the conformities with the established laws and principles of artificial microevolution due to the accelerated development of these specialized software platforms, is relevant. It is determined that the classical method of analysis of variance, due to its linearity, does not allow to distinguish the component of IGE (interaction “genotype-environment”) from the general system of modification variability. Instead, the reflection of the productive system of competitive strain testing in the form of phase-parametric portraits on time series of test years allows establishing the component of IGE as an important element that determines the epigenetic-adaptive properties of the phenotype. The innovativeness of approaches consists in the transition from additive mathematical models to additive-multiplicative models. The main result of research is the formation of new approaches that will select the breeding numbers with a synergistically optimized combination of adaptive-productive properties identified in the process of ontogenetic development and deep phenotyping of plants. On the platform of the received experimental data new conceptual approaches to change of a paradigm of selection are developed. In particular, the classical methodology, selection scheme and staging of the classical genetic experiment in the system of diallel crosses in order to obtain differentiated variances assume that the actual selection takes place on the basis of splitting generations, that is on a phylogenetic and population basis. In the system of phase-parametric portraits of selection samples in the competitive strain testing of different years in various combinations of interactions “genotype-environment” patterns of trajectories of maximum parameters of productivity of number Hybrid 2 in all years of testing (lim 574-842; xaverage = 713 g/m2) are allocated. In the system of phase portraits of component features, the peculiarities of the interaction of component features according to the type of pattern formation (trajectory thickenings) are highlighted. In particular, the portraits show three types of interactions, including anisotropic robust ejections (for efficient selection by discreteness), bifurcation states (for selection by direction of practical use) and patterns of trajectory concentrations (for selection of stabilized clusters). An innovative method of analysis of the experimental digital matrix of competitive strain testing as an evolutionary dynamic system on the trajectories of development of phase-parametric portraits is proposed. The possibility of differentiation of selection samples on the interpopulation level at identification of valuable genotypes by phenotype in the innovative system of analysis of phase-parametric portraits which will allow purposefully and effectively to use adequate types of selection is proved.

The aim is to study how presowing usage of biologies Mycofriend, Mikovital and Florobacillin influences on biometric indicators of maize, its productivity and soil moisture holding capacity. Using mycorrhizal fungi and nitrogen-fixing bacteria, we have received positive results about their influence on plant growth and development and maize yield forming. Leaf surface area in variants with fungi Trichoderma harzianum Rifai (Mycofriend bio-based product), and Tuber melanosporum Vittad (Mikovital bio-based product) and bacteria Bacillus subtilis Cohn. (Florobacillin bio-based product) was counted on 30th, 60th, 90th and 120th days of vegetation and was estimated by 11.2–90.0% higher compared to the control. Leaf mass and root system mass exceeded control indicators by 24.0–48.9%, respectively. Plants height in these accounted periods was higher by 4.0–31.5% compared to the control. In addition, in these variants, soil moisture holding capacity increased by 7.3–38.1%, share of soil lumps smaller than 0.25 mm decreased by 2.8–7.2%. Grain yield of Maize in variants with mycorrhizal fungi and nitrogen-fixing bacteria was 1.64–2.68 t/ha higher than in the control. It should be noted that presowing usage of fungus Trichoderma harzianum Rifai on plants seeds, provides better efficiency on plants’ growth and development and their productivity.

The case study to determine the peculiarities of Miscanthus giganteus aboveground biomass formation depending on sewage sludge and composts rate carried out in the Precarpathian region of Ivano- Frankivsk province on sod-podzolic soils. The largest area of the leaf surface of miscanthus is formed in the trials where fresh sewage sludge was applied in the rate of 20 - 40 t/ha. The leaf surface area increases from 19 up to 24.0 cm2/plant, and the yield of raw mass of plants at the level of 23.5 - 25.1 t/ha due to increasing rates of sewage sludge application. The highest indicators of net photosynthesis productivity were found in the period of intensive growth, which amounted to 7.78 g/m²/day and in the maturation period of 7.56 g/m²/day in the trial SS - 40 t/ha + N10P14K58. The amount of dry mass of miscanthus plants significantly depends on the height of the shoot and the leaf surface area of the plants. The use of compost based on sewage sludge and straw in a ratio of 3: 1 at a rate of 30 t/ha contributes to the dry weight of miscanthus plants at the level of 15 t/ha.

To ensure the maximum protection of agricultural crops from climatic factors unfavorable for their growth and development, it is necessary to create an optimal number of field protection forest strips. In particular, for the Forest-Steppe zone of Ukraine, less than half of the optimal needs are available, which indicates an urgent need for their additional creation. The expediency of creating fast-growing and multifunctional field forest strips is substantiated, and the productivity of new bioenergy crops during their formation for use in beekeeping and as biofuel is determined. For this purpose, a model of the artificial formation of a forest strip with its possible further exploitation is proposed. The most optimal one is to develop the concept of creating field forest strips with the use of multifunctional tree species, which, in addition to the function of wind, water and dust retention, will also perform other economic tasks. In particular, along with their intended purpose, they can be used as raw materials for biofuel production and as early honey plants. For the accelerated creation of field protection forest strips, it is advisable to use mixed 6–8- row plantings, where the middle 2–3 rows are planted with the involvement of tree species, including the use of species valuable as raw materials for beekeeping. These forest strips are complemented on both sides by planted strips of energy crops, which are important for beekeeping and are a valuable resource for obtaining fuel raw materials. For this purpose, it is advisable to plant 10–12 thousand pieces on one hectare poplar cuttings (Populus sp.), 1250 pieces of paulownia plants (Paulownia tomentosa Steud.) with a row width of 2×4 m and 17–18 thousand pieces cuttings of energy willow (Salix viminalis L.). It is also possible to replace part of the poplar cuttings with cuttings of common robinia (Robinia pseudoacacia L.) and linden (Tilia cordata Mill.). The creation of such plantations near settlements will contribute to their significant use of raw materials and will be quite effective in carrying out their main function of ecological stabilization of agro-landscapes.

Among the significant number of grain cereals used for the production of solid kinds of biofuels in the form of fuel pellets and briquettes as the acceptable raw material is biomass of switch grass, or “virgate millet”. The main purpose of the research was to substantiate a new approach for determination of the optimal seeding rate and calculation of the yield of biomass of switch grass by means of application of morphometric indices of leaf surface area and mass of the aboveground part, determining the statistical relationships between them. It is determined that the leaf surface area and the mass of the aboveground part of the switch grass consist of the sum of the plant area; mathematical calculations based on correlations were used to obtain it. The correlation coefficient between the surface area of the leaves on the shoot and its height is calculated. The maximum leaf area of virgate millet plants can be achieved at a seeding rate of 4.0–4.5 million seeds/ha, which makes it possible to form in the first year of vegetation 70–80 plants per linear meter. The height of the stem and the number of leaves on it has the greatest influence on the leaf surface area and the mass of stems of switch grass plants. The close multiple correlations between the leaf surface area and the mass of the stem and its height and the number of leaves on it make it possible to calculate the leaf surface area and stem mass based on morphometric indices of switch grass plants. The results of determination of the indices of yield formation of switch grass depending on the morphometric data of the leaf surface area and the mass of the ground shoot are presented.