PROSPECTS FOR THE USE OF ORGANOMINERAL FERTILIZERS ON RAPESEED CROPS
The aim of the study was to assess the effect of organic and mineral fertilizers on the degree of development of spring rape plants in the first period of ontogenesis. Plant development was studied when applying: chicken manure (2.5 t/ha); chicken manure (2.5 t/ha) with zeolite (3 t/ha); mineral fertilizer (N60:P60:K60) separately and together with zeolite (3 t/ha); pure application of zeolite (3 t/ha). The control was carried out without applying any fertilizer. The introduction of these fertilizers led to intensive growth of plants at the first stages of development, an increase in the vegetative mass of plants, the root system and the development of the leaf surface. This, in turn, had a positive effect on photosynthetic parameters. The most active photosynthetic activity was observed in plants on the variant with the introduction of chicken manure (2.5 t/ha) in pure form and together with zeolite (3 t/ha). All biometric indicators of rapeseed plants in the initial stages of plant formation were increased in comparison with the control. The introduction of zeolite in its pure form was at the level of control for the studied indicators, and when it was applied together with fertilizers, it provided a significant increase. The study of the microelement composition of plants allowed us to establish that zeolite exhibits sorption capacity in relation to heavy metals, as a result of which the vegetative part of plants accumulates them in smaller quantities