THE MODERN CONDITION OF THE DARK SEROZEMS OF THE AKTAU MOUNTAIN NURATA DISTRICT

Abstract

The article presents the morphological, agrochemical, agrophysical indicators of dark gray soils common on the mountain slopes of the Aktau ridge of the Nurata mountains of the Navoi region. Eluvial-deluvial stoned layers formed on the products of destruction of various bedrocks serve as soil-forming beds. In terms of the texture of dark gray soils, dusty fractions prevail. Particularly high content of coarse dust fraction (28.74-46.48 %) Physical clay is 22.58-30.80 %, silt fraction in soils 9.00-10.84 %. Micro-aggregation in the surface horizon is 15.54-16.06 %, down the profile the micro-aggregate increases to 21.80 %. Virgin dark gray soils are characterized by absorption capacity, which, according to the amount of absorbed base, is 8.5-11.37 mg / eq. per 100 g of soil. The absorption capacity depends on the content of organic and mineral colloids, the reaction of the soil solution. These soils are potentially fertile, well supplied with humus. Along the profile, the amount of humus decreases rapidly, but its significant content is also observed in the deep horizons of 0.947-1.010 %. The content of mobile forms of phosphorus varies widely (9.0-23.0) leached. The content of carbonates in the upper horizon is 0.99-1.43 %, down the profile their amount increases to 13.2 %.