Current condition of agroecosystems of the Central Tuvinian steppe and dry steppe district

Abstract

Purpose. Assessment of the current state of agroecosystems of Central Tuva. Methods. The objects of research - the chestnut shallow soils, plant communities and agroecosystems of the Central Tuva steppe and steppe districts of the South of the Tuva-Khangai basin-mountain province of the steppe zone. The study of chestnut soils of natural ecosystems and agroecosystems was carried out on the remaining areas of the Central Tuva basin. Results. The general consequence of the agricultural development of the initial dry-steppe ecosystems of the Central Tuva basin is a violation of the combined energy turnover, a decrease in the productivity of transformed agroecosystems, an increase in the degree of the earth's surface exposure and, as a consequence, the general manifestations of land degradation. Summary. The main difference between the fallow phytocenoses and the communities of the initial indigenous steppes is the structure of phytomass: on the deposits above-ground and below-ground phytomass reserves. The structure of the plant substance is the last to reach the terminal level of all the considered parameters. Currently, due to the short duration of agricultural use of the territory of Tuva, abandoned arable land is in the process of restoration. The fallow succession of agroecosystems is unidirectional, deterministic, passes certain stages and leads to plant communities that existed before the plowing of virgin lands.