The article examines the peculiarities of the DOMINANT GREENSHELL egg-laying poultry, in particular, the indicator of laying capacity in floor-level growing. Environmental factors affecting the viability and productivity of chickens have beenanalyzed. Data of the experiment has been given and such shortcomings of keeping as loss and high specific weight of dirty and broken eggs have been revealed. The components of the cost price and the change in the cost price of finished products in different periods of poultry breeding have been highlighted. On the basis of the conducted experiment, an explanation has been made regarding the impact of production costs on the cost price of eggs, in particular compound feed. The profitability of the production of eggs with a colored shell for floor-level growing has been analyzed and the necessity of selling them in the premium segment has been proved.

Features of development of corn root system of hybrid Dniprovskyi 181 CB under the influence ofthe microbial preparation Polimiksobakteryn (biological agent os which Paenibacillus polymyxa KB is anactive producer of physiologically active substances) were investigated in a vegetation experiment. It hasbeen established that the use of Polimiksobakteryn for pre-sowing bacterization of deeds and surfacetreatment of the vegetative plants in a phase of 3-5 or 7-9 leaflets induces increase in the size of the rootsystem and its adsorption surface. It was shown that the bacteria Paenibacillus polymyxa KB is aproducer of phytohormone substances of auxin nature, which explains the ability of the microbialpreparation Polimiksobakteryn to positively influence the processes of growth and development of the rootsystem.

The study investigates the effects of immobilizing the fungi on the straw's performance as an oil sorbent. The buoyancy of the straw with fungi was found to be unaffected by the immobilization process. Even when sorbed with oil, the straw floated on the water’s surface throughout the 14-day test period. The sorption kinetics of the oil appeared similar in straw with and without immobilized fungi, regardless of beaker shaking. However, the fraction of non-extractable oil was higher in the straw with fungi and shaking compared to the straw without shaking. This observation suggests the potential initiation of oil mining. Based on these results, it is suggested that instead of leaving the straw with fungi and oil in the water, removing it may be beneficial and allow for oil degradation and straw decomposition on land.

Currently, the introduction of new techniques for corn growing technology, which involves the use of microbial drugs – growth stimulators and the study of their effects on the process of photosynthesis is relevant. In the conditions of field experiment on black soil, the effect of microbial preparation Polimiksobakteryn – a growth stimulator of plants on various methods of its application on the formation and productivity of the photosynthetic apparatus of maize plants of hybrid Dniprovsky 181 SV was studied. It was determined that the bacterialisation of seeds with subsequent surface treatment of vegetable corn plants with Polymiksobacteryn in the phase of 3–5 or 7–9 leaves – agroprimus, which provides activation of the process of photosynthesis. In particular, for the combination of bacteritisation and surface treatment of vegetative plants, the area of the leaf surface increases to 5315 cm2/plant in the flowering phase, which is 40.0% more relative to the control variant, this indicates an improvement in the conditions of growth and development of maize due to the growth-stimulating properties of the microbial preparation. The index of chlorophyll content (a + b) increases, and among all the experimental variants, the highest value of 146.7 mg/100 g of leaves installed with the combined use of Polimyksobacteryn – the bacteritisation of seeds and surface treatment by vegetation, which is 36.2% higher than the benchmark 107.7 mg/100 g of leaves. The increase in area of the leaf surface was accompanied by raising in the net photosynthesis efficiency of 6.34 g/m2 per day in the control version to 10.39 g/m2 per day (or 63.8%) as a result of bacteritisation and surface treatment of corn vegetable plants, indicating about formation of the optimum structure and productivity of the paper machine. It should be noted that according to the data, the method of using microbial preparation, which included seeding bacteria and superficial treatment of vegetative plants, better than taking bacteria or seed treatment separately. Therefore, in the cultivation of maize, the use of the microbial preparation Polymiksobacteryn, the growth stimulator of plants, by bacterialization of seeds in combination with surface treatment of plants in vegetation, increases the quantitative and improves qualitative parameters of photosynthetic activity of plants, which is essentially of practical importance for increasing the productivity of this culture.

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