Assessment of ecological state of Rostov zoo soil

A comparative study of ecological and biological parameters soils the Rostov-on-Don Zoo was carried out in 2017-2020. Monitoring sites were studied areas various purpose: aviaries with different animals, recreation area, park area. The control plot a relatively undisturbed section territory zoo. Different revealed heterogeneity conditions soil properties. most significant difference physical properties soils. Density, penetration resistance, structure degraded large animals: rhinos, zebras, deer. Using methods bioindication, degree change determined compared plot. abundance nitrogen-fixing bacteria Azotobacter genus reduced rams, rhinos giraffe due to artificial addition sand for purpose improvement its activity enzymes (urease dehydrogenases) significantly increased their contamination animal excretory products. particularly high increase urease (up 7.4 times relative soil). main problems topsoil zoo are overconsolidation, structural degradation, organic pollution, activity. depends on size aviaries, animals amelioration aimed at regulating soil.