[Changes in quantity and species composition of streptomycetes associations in soil polluted by heavy metals]

High content of Cu, Fe, Cd, Zn, Ni mobile forms in industrial platform technozems of ore-concentrating factory causes a 1.5-6.3-fold decrease of microorganisms total quantity and 3-4 fold decrease of streptomycetes amount. The obtained results are confirmed by the model experience information, in accordance to which the streptomycetes amount decreases 1.8-2.4 times on the 1st and 10th days when CdSO4, Fe2(SO4)3, Ni(NO3)2, CuSO4, ZnSO4, (CH3COO)2Pb.Pb(OH) are brought in chernozem at the maximal concentration of heavy metals. The renewal of common chernozem microbiocenosis quantity under the effect of maximum possible concentration of heavy metals salts (MPC) is observed already on the 30th day of research, while at 5 MPC it is observed--after 90 days, and at 15 MPC--the cenosis homeostasis is violated irreversibly. The dominants of technozems streptomycetes association are S. albocrustosus, S. sporostellatus, S. sporoherbeus, S aerionidulus and S. violobrunneus. The influence of heavy metals blend in the industrial platform technozem results in the decline of streptomycetes variety in the association.