The creation of optimum plant nutrition plays a significant role in increasing farming efficiency. Fertilisers are one of the fastest ways to intensify the cultivation technology of all crops. The application of organic fertilisers derived from chicken manure changes the soil’s nutrient regime and nitrification capacity, its biological activity and improves physical properties. The study aims to identify the comparative evaluation of organic fertilisers based on chicken manure and establish their effect on the productivity of fodder crops (soybean and oats) and soil biological activity. The authors also determined the effectiveness of using poultry manure as an organic fertiliser to preserve soil bioresources. New organic fertilisers based on chicken manure were tested in work, obtained using a cavitation-vortex heat generator by processing semi-dry manure. Their influence on growth, development and biometric indicators of oat and soybean plants, phytosanitary state of crops, yield and grain quality has been revealed. The effect of organic fertilisers from chicken manure on microbiological indicators of soil has been determined. The increase of the oat grain yield was from 0.4 to 0.63 tons/ hectare, or 17% of the control. The output of soybean grain increased significantly by 0.18 to 0.22 t/ha. There was a slight increase in the protein content of seeds (by 1.2-2.6%). It was found that the fertilisers improved the structural indicators of oat and soybean plants. Thus, the weight of grains in oats increased by 18-23%; the number of grains in the panicle also increased by 13%. As for soybean, the number of beans on a plant grown by 14-23%; the weight of grains per plant increased by 16-19%; safety of plants for harvesting increased by 5-7%. Fertilisers based on chicken manure help improve the soil’s microbiological characteristics, which grows the availability of nutrients to plants.

The results of studying the effect of preparations based on chicken manure on the growth and development of oats are presented. Chicken manure contains valuable substances that are easily used by plants, but because of the large number of pathogens, its use can lead to pollution of the environment. Currently, a promising direction is the use of poultry manure after additional treatment. Recycled chicken manure was used in the research using a cavitation-vortex heat generator by distilling dry manure as a 10% solution in water and obtaining various fertilizer samples. The manure was treated at different thermal regimes - 60 and 75 °C, with or without ozone. The effect of organic fertilizers based on chicken manure on soil biological activity and productivity of oats was studied. Numbers of the main groups of microorganisms were established by the conventional method of seeding on nutrient dense media. Soil phytotoxicity was determined according to the test-object recommendations. Oat growth and development were studied during the vegetation period, evaluating the onset of phenological phases, biometric indicators and elements of yield structure. A negative effect of chicken manure on the microflora (the appearance of conditionally phytopathogenic fungi) and phytotoxicity of soil, as well as on the condition of cultivated plants was revealed. The manure processed by distillation into organic fertilizer improves the environmental situation. A positive effect of organic fertilizers based on poultry manure on the phytosanitary state of the soil and nitrogen-fixing activity of the soil was found. An increase in productivity of oats was noted on the background of the application of organic fertilizers. There was a significant increase in green mass and dry matter in the flowering phase of oats by 6.0-6.2 and 1.1-1.7 tons/ha, respectively. Oat grain yield was higher by 0.7-0.8 t/ha, or 20%, compared to the control.

Organic fertilizers based on chicken manure have a diverse composition of basic nutrients and microelements, which is their advantage over mineral fertilizers. The introduction of organic fertilizers obtained based on chicken manure improves the biological activity of the soil. The study aims to determine the effectiveness of using bird droppings as an organic fertilizer to conserve soil bioresources and increase soybean productivity. In the course of the work, the authors tested new organic fertilizers based on chicken manure obtained using a cavitationvortex heat generator by processing semi-dry manure. Their influence on soil microbiological indicators, growth, development, and biometric characteristics of soybean plants, phytosanitary condition of crops, productivity, and product quality was revealed. The authors also found that fertilizers based on chicken manure help to improve the microbiological characteristics of the soil, which increases the availability of nutrients for plants. The authors note a change in the number of mycomycetes at the beginning of the growing season: a decrease of 68% with the use of Preparation 1 and an increase of 35.6% with the use of nitrogen fertilizers. Pre-sowing introduction of preparations into the soil and processing during the growing season activate the vegetative development of plants and contribute to an increase in the yield of green mass and grain. The greatest effect was obtained when preparation 2 was applied under soybean. The increase in soybean grain yield was 0.2–0.3 t/ha or 8–14% of the control. The authors also found that treatment with drugs improves the structural parameters of soybean plants: the number of beans per plant increases by 6–8%; by 18–23% - the mass of grains from one plant; the safety of plants for harvesting increases by 2–4%.