СЪСТОЯНИЕ НА ПОЧВИ В ГОРСКИ ЕКОСИСТЕМИ, ПОВЛИ- ЯНИ ОТ МИННОДОБИВНИТЕ ДЕЙНОСТИ В РАЙОНА НА ПИРДОП

Despite of the introduced normative requirements, the control, the efforts made, the planned and implemented measures for environmental protection, the three large enterprises from the mining and concentrating industry contribute to the significant heavy metal pollution of forest ecosystems in the region of State Forest Enterprise Pirdop. Contamination with heavy metals leads to deterioration of soil properties, and hence to deterioration of the growth and productivity of the aboveground forest plantations. The present study aims to assess the condition of forest soils on the territory of SFE „Pirdop" by determining and interpreting a number of samples of forest floor and soil analyzed by the following parameters: pH, C% and N%, content of heavy metals Cu, Zn, Pb. Based on the obtained results the presence of acidification processes in soils was established, which creates a risk of deterioration of their forest vegetation properties and therefore worse conditions for growth and development of forest-tree vegetation. The detected pollution with heavy metals Cu, Zn, Pb in some of the studied sites is extremely high, both in the soil and in the forest floor, which indicates the need for monitoring in order to define urgent measures to reduce the risk of deterioration of the soil condition and the state of ecosystems. [ABSTRACT FROM AUTHOR]