To the assessment of ecological condition of meadow-brown soils of Primorye

The results of researches of microelement struc-ture, physical and chemical indicators of the mead-ow-brown bleached and meadow-brown chernozy-omic soils created in various hydrothermal provinc-es of the region are given in article. As a part of the soil absorbing complex in the studied soils ions of Sa2 + and Mg2 + prevail. The meadow-brown bleached soils differed from meadow-brown cher-nozyomic in smaller exponents of the saturation the bases and the maintenance of mobile forms of po-tassium and phosphorus. Distinctions in the maintenance of humus and its stocks were estab-lished. For the meadow-brown bleached and meadow-brown chernozyomic soils of Prikhan-kaysky GTP higher maintenance of humus and its stocks, in comparison with meadow-brown cherno- zyomic gleen soils of Upper-Razdolnensky GTP was characteristic. Meadow-brown chernozyomic soils of the studied provinces differed in intra profile nature of distribution of humus. In Prikhankaysky GTP gradually decreasing nature of distribution of humus was peculiar to soils. Saturation degree was investigated by a catalase of the soil to group of soils with poor catalase activity. In the arable hori-zons of meadow-brown chernozyomic soils con-centration of Cr and Cu throughout all soil profile exceeded regional Clark values. In the meadow-brown bleached soils the maintenance of Cu in ar-able layer was in Clark's limits and sharply in-creased in the underlying horizon. Close connec-tion between catalase activity of the meadow-brown bleached soils and the maintenance of Cr and Co was revealed. In the meadow-brown bleached soils of Cr and Co negatively correlate with catalase en-zyme (r =-0,9) was observed. In meadow-brown chernozyomic soils reliable correlation between change of catalase activity and the maintenance of Zn (r = +0,8) and Cu was established (r = +0,9).