Опустыненные полынно-дерновиннозлаковые степи Центрального Казахстана

Abstract

The considerable vegetation researches of the Kazakhstan steppes were realized in 1957–1959, 1964–1968. The vast materials with relevés of desert steppes’ communities were collected in according to the generally accepted methods of geobotanical investigations either with assistance of detailed field routes or at the scientific stations (Kratkoe…, 1952; Polevaya… 1964). Some data about foremost northern types of Kazakhstan steppes (Isachenko, Rachkovskaya, 1961) and desert steppes of one region only (i. e. south-west part of the Central Kazakhstan Melkosopochnik) were published earlier (Biokompleksnye …, 1969). This article is an effort to complete the missing information about desert sagebrush–bunchgrass steppe of Central Kazakhstan through its full characteristics and classification. The desert sagebrush-feather grass steppe is the foremost southern type of steppes confined to light chestnut soils; its southern border coincides to the border between steppes and deserts (it’s about 48° N for Kazakhstan). Melkosopochnik (hilly, ridgy, and rocky) with relative elevations from 20–50 to 100–150 m is a dominating type of relief in the Central Kazakhstan. The hills are composed of the different rocks: granites, acidic and basic effusive rocks, sandstones and shales.