МИКРОМОРФОЛОГИЧЕСКАЯ ХАРАКТЕРИСТИКА БУРЫХ И СЕРО-БУРЫХ ПУСТЫННЫХ ПОЧВ ЮГО-ВОСТОКА КАЗАХСТАНА

Abstract

The characteristic of micromorphological properties of two desert soils - brown and gray-brown have given. It has shown that brown desert soils have fragile structure of aggregates, the compact microtexture and high content of primary minerals and fragments of dense rocks. Stages of transformation of the plant residues and pronounced biological activity in a middle part of a profile have noted that it have explained by more favorable habitat of conditions: temperature and moist regime. The special attention have paid to accumulation of carbonates, its various forms and the sizes. Micromorphological researches of gray-brown soils have shown that in the top part of the horizon A existence of a bubbly (vesicular) pores of the different sizes characteristic of desert pedogenesis, the compact microtexture of a middle part of a profile connected with accumulation of fine clay material in the form of coatings (kutana) and infilling in voids and also iron compounds.