Organomineral fertilizers effect on Cu and Zn accumulation in spring rapeseed plants

The purpose of research is to study the effect of different doses of chicken manure (CP), zeolite (C), their mixtures and mineral fertilizers on the accumulation of microelements in the vegetative organs of spring rape plants at different stages of development in the Lipetsk Region. The object of the study was the variety of spring rapeseed Rif, bred by the State Scientific Institution All-Russian Research Institute of Rapeseed in cooperation with the State Scientific Institution VNIIMK. The results of the experiment showed that the introduction of the zeolite-containing rock of the Terbunskoye deposit promoted a decrease in such trace elements as Cu and Zn in the vegetative mass of rapeseed throughout the entire period of plant development. On experimental plots using organic-mineral mixtures (organic waste from a poultry farm at doses of 2.5; 5 and 10 t/ha), together with natural zeolite (3 t/ha), active adsorption of the zeolite-containing rock of the Terbunskoye deposit in relation to Zn was revealed, which contributed to a decrease in the element in vegetative mass of rape in the rosette phase at 1.348; 1.901; 1.042 mg/kg dry matter; in the flowering phase – by 1.405; 1.920; 1.287; in the pod phase – by 1.622; 1.994; 1.939; in the harvesting phase – by 1.492; 1.806; 1.594 mg/kg of dry matter, respectively. A decrease in Cu in spring rape plants was also established in these variants relative to the control. A significant decrease in copper was noted in the rosette phase on the variant KP 2.5 t/ha + C 3 t/ha; in relation to the control, a significant decrease in the element was 0.928 mg/kg of dry weight of plants. Consequently, the studies carried out make it possible to recommend the cultivation of spring rapeseed using organic waste as fertilizers together with natural zeolite under the conditions of the Lipetsk Region.