СВОЙСТВА И ОСОБЕННОСТИ ОСТАТОЧНЫХ ПРИБРЕЖНЫХ АВТОМОРФНЫХ СОЛОНЧАКОВ ОБСОХШЕГО ДНА АРАЛЬСКОГО МОРЯ

Abstract

The article presents new information obtained about the properties of residual coastal automorphic salt marshes, widespread on the dried bottom of the Aral Sea. Data on the mechanical composition are presented, as well as the results of agrochemical analyzes of residual coastal automorphic salt marshes. One of the important results obtained is that alluvial deposits consist mainly of particles of heavy and medium loamy mechanical composition, and the number of physical clay particles (<0.01 mm) in clays is 60.6-68.6%, in heavy loams - 56-59.2%, and in medium loams - 31.4-43.6%, in some areas sandy loam and sandy horizons are also found. The article also presents the degree of salinity and the composition of absorbed cations of residual coastal automorphic solonchaks of the dried bottom of the Aral Sea, from which it is clear that the amount of absorbed bases (absorption capacity) in the upper layer of residual coastal automorphic solonchaks is 10.75-34.80 mEq per 100 grams of soil, and in the lower layers - 16.57-16.80 mEq. In the composition of the absorbed cations of automorphic solonchaks of the dried bottom of the Aral Sea, magnesium and sodium cations predominate, and the amount of calcium in the total composition is 11.49-31.63%, magnesium - 1.09-3.53%, sodium - 20.18-54 .65%, and mainly consist of soils with varying degrees of salinity (<10% mg/kg).