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The influence of improvement of natural forage lands on the intensity of accumulation of PB, Cd, Zn and Cu in cereal and legume grasses for application of organic fertilizers and defects to the soil has been studied.It has been proved that the high efficiency of reduction of lead and cadmium in legume-forbs plants for improving the condition of natural forage lands in the area of their local pollution was followed by the introduction of organic matter and defects into the soil. It was also found that with the increase of vegetation years of forbs and legumes of natural fodder lands for the introduction of organic fertilizers and defects, the concentration of lead, cadmium, zinc and copper in it decreased.As a result of theoretical analysis and experimental research, the level of heavy metal contamination of plant biodiversity of natural forage lands at different man-made loads was studied. The intensity of pollution of plant biodiversity of absolute land, normal land and land of excessive moisture of dry lowland meadows of Vinnytsia Pb, Cd, Zn and Cu in the conditions of different technogenic loading is estimated. It was found that with a radical improvement of natural forage lands of dry lowland meadows compared to the surface in the conditions of local pollution, a lower intensity of grass accumulation of heavy metals was observed already in the 1st year of vegetation. The analysis of the obtained results allows us to conclude that the vegetation of natural forage lands in the conditions of local pollution of Vinnytsia region can accumulate above the allowable level of cadmium, which is characteristic of dry moisture, relatively lower content of heavy metals. Under the agrochemical impact on natural forage lands there is a certain pollution of their heavy metals, the accumulation of which in the vegetation depended on the system of tillage with the use of organic matter, relatively higher than mineral fertilization with surface tillage.Key words: lead, cadmium, zinc, copper, grass and legumes, natural forage lands.

INFLUENCE OF BIOLOGIZED FERTILIZER SYSTEMS ON THE INTENSITY OF ACCUMULATION OF HEAVY METALS IN LEGUME-FORBS PLANTS