Evaluarea conținutului nutrienților în orizonturile solului nou-format de pe suprafața haldelor de steril în procesul de restabilire naturală a ecosistemului petrofit din cariera de calcar ,,Lafarge ciment”

It has been established that the content of heavy metals in tailings dumps of different ages does not exceed the alert threshold for any component. The content of K2O in the 0-20 cm layer is higher than in the 20-40 cm, which is explained by biogeochemical (phytocenotic) processes. It is demonstrated that the total nitrogen content on the surface of tailings dumps of different ages depends on their age. The highest nitrogen content is contained in the newly formed soil layer on the surface of the 25 year old waste heap in the 0-20 cm layer. This is explained by the fact that the largest number of plant species (63 units) that have produced the largest amount of organic substance (humus) from the mass of biodiversity are growing on this dump.