Assessment of environmental status of soil steppe agroecosystems on indicators of biological activity

Studied enzymatic and microbiological activity of soils on agrocenoses and shows the integral evaluation of their biological condition in a steppe Trans-Urals Republic of Bashkortostan. The enzymatic activity of soils was studied by the following methods: catalase activity - on A. S. Galstyan (1974); cellulose - by applications, proteolytic - to reduce the weight of nitrogen-containing substances gelatin, urease on account of quantity of ammonia in the decomposition of urea. To assess the ecological state of soil agroecosystems integral indicator of the biological condition of the soil was used (IPBS) (Valkov et al., 2001). The number of major ecological and trophic groups of microorganisms set by planting soil suspension of dilutions on agar nutrient medium meat-peptone agar (MPA), starch-ammonia agar (SAA), an empty agar (GA), agar soil extract (PA). The characterization of the microbial community structure was carried out by the coefficients: immobilization of mineral nitrogen (Kimm) oligotrophicity factor (Kolig)...