ASSESSMENT OF BIOLOGICAL CONDITION OF GYPSIFEROUS SOILS BY DEHYDROGENASE ACTIVITY

Abdullaeva Kh.; Makhkamova D.; Iskhakova Sh.; Pulatov B.

Authors

Abdullaeva Kh. Researcher Department of Soil, National University of Uzbekistan named after Mirzo Ulugbek, Tashkent, Uzbekistan
Makhkamova D. Dsc., Associate Professor, Department of Soil, National University of Uzbekistan named after Mirzo Ulugbek, Tashkent, Uzbekistan
Iskhakova Sh. PhD., Associate Professor, Department of Soil, National University of Uzbekistan named after Mirzo Ulugbek, Tashkent, Uzbekistan
Pulatov B. Associate researcher, Institute of General and Inorganic Chemistry, Academy of Sciences, Tashkent, Uzbekistan

Keywords:

Dehydrogenase activity, gypsiferous soil, soil biological activity, enzymatic activity,soil microorganisms, bioindication of degradation, ecological soil assessment, oxidoreductase enzymes, agroecosystems, soil salinization and gypsum content.

Abstract

The article deals with enzymatic activity of gypsum-bearing soils of Jizzak region, characterised by high content of gypsum (20-30 %) and diversity of its morphological forms - from fine crystalline in auxiliary horizons to coarse crystalline in groundwater zone. These soils occupy significant areas of terrace complexes of the region. It was found that enzymatic activity, in particular the activity of dehydrogenase, a sensitive intracellular enzyme, is closely correlated with the level of hypsification and type of agrocenosis. Dehydrogenase serves as an informative bioindicator reflecting the general biological state of soils and intensity of microbiological processes, especially in conditions of gypsum and saline ecosystems.