The content and distribution of heavy metals in gray forest soil and the specificity of their receipt in plants
The content and distribution of copper, cobalt and zinc were studied in the system plant - soil of long-term trial established at grey forest soil in the forest steppe belt of Western Siberia. The mineral fertilizers (nitrogenous, phosphoric and potassic) which were yearly applied in the agrocenosis in the course of a quarter of century served as a permanent source of heavy metals (HM). The conducted studies showed that optimization on of mineral nutrition of plants not only ensured of full value productional process but also reduced the content of HM in soil and plants. More over, the conducted studies confirmed general regularity of limitation of HM entry into reproductive and storage organs (seeds, fruits, tubers) and their heightened accumulation in generative organs (leaves, stems). Long-term use of scientifically grounded doses of fertilizers did not lead to accumulation of HM in soil and plants in meaningful amounts as concerns of active sanitary and hygienic guidelines. At the same time, contemporary level of chemicalization of farming requires the monitoring of HM under study in order to reveal their excess and lack.