INTENSITY OF ACCUMULATION OF RV IN SHEET MASS AND SEEDS OF MILY SPOTULA (SILYBUM MARIANUM)

The article is devoted to the study of the intensity of lead accumulation in the leaf mass and seeds of the milk thistle due to its fertilizers with various minerals. The medicinal properties of milk thistle and the risks that may occur when lead enters the human body are shown. The rate of accumulation and absorption of lead by the leaf mass and seeds of milk thistle was studied for the use of various fertilizer schemes: ammonia, phosphorus, potassium fertilizers, their mixtures and without the use of fertilizers. The obtained indicators are listed to establish the accumulation and hazard factors taking into account the maximum permissible concentrations. It is proved that with the use of fertilizers, less lead is accumulated by the plants of milk thistle using a mixture of ammonium nitrate, superphosphate simple and potassium chloride. The greatest accumulation of lead by seeds is observed when fertilizing milk thistle with spotted ammonium nitrate, and by leaf mass – when fertilizing with potassium chloride. The results of the research revealed intensive absorption and accumulation of leaf mass and seeds of thistle spotted lead in quantities that are significantly higher than the maximum permissible levels and puts the requirements for improving the cultivation of this crop in modern field crop rotation. It was found that the least amount of lead is accumulated in the leaf mass and the seeds of milk thistle in the absence of any fertilization of its crops. At application of fertilizers the least lead accumulates by plants of thistle spotted at application of a mixture of fertilizers of ammonium nitrate, simple phosphate and potassium chloride in application rate N – 60 kg / ha, P – 60 kg / ha, K – 60 kg / ha. The greatest accumulation of lead by seeds is observed in the fertilization of thistle spotted ammonium nitrate, and the leaf mass – in the fertilization of potassium chloride.