CHEMICAL-COMPOSITION OF PLANTS IN THE AFRO-ASIAN DESERT PROVINCE IN THE COURSE OF SUCCESSION

Stores of phytomass and chemical elements are compared in phytocenoses of different parts of the Afro-Asian desert province and in adjacent regions according to the author's data in North Africa, the Karakum, t he central part of the Kyzylkum and Karnab (in southern Uzbekisian), t he Northwestern Caspian region, in steppe and Gobi parts of Mongolia, and also in Cuba, and according to published data on Syria (Rodin et a l., 1973), the Aral region (Bykov et al, 1974; Anapiev, 1974), and the Taukum (Osmanova et al, 1974) in Kazakhstan. Within the bounds of a r egion, phytocenoses are in different stages of primary and secondary s uccessions in the course of digression and demutation.