Agroecological monitoring of the state of the chernozem forest-steppe zone of the Krasnoyarsk krai

Abstract

In the last century, irrigated agriculture was used on the territory of the Krasnoyarsk krai on an area of more than 25 thousand hectares and was located mainly in the southern regions of the krai and in the suburban zone. During this period, large closed and open irrigation systems of the engineering type were operating, using  medium-jet and  long-jet sprinklers and  aggregates,  such as «Frigate», «Volzhanka», DDN-70 DDA – 100, etc. On many irrigation systems, watering was carried out in violation of scientifically based irrigation regimes, which led to a violation of the ecological balance in the «water – soil – plant» system, an increase  in the groundwater level on the lower elements of the relief, the occurrence  of the secondary salinization, alkalinization. Currently, irrigated agriculture is episodic,  irrigation systems are taken  out of order, irrigated areas are transferred to a deposit or used in rain-fed agriculture. Monitoring studies were conducted to study the state of humus and the structural and aggregate composition of post-irrigation lands.