Influence of the layland development technology on the water-physical and agrochemical properties of the soil of Central Siberia

Abstract

Relevance. The disadvantages of steppe nature management include soil degradation, deficiency of mineral nutrition elements and other adverse phenomena. Similar processes are taking place in Siberia. Currently, the re-development of laylands is beginning and soil degradation is again manifested in the steppe regions of Khakassia. For the effective use of land resources, it is necessary to develop a technology for processing soil deposits in the arid steppe zone of the south of Central Siberia.Methods. The study of the effectiveness of soil treatment technologies of the erosive agroecological group of laylands was carried out in the arid steppe agrolandscape region of the Republic of Khakassia, located in the south of Central Siberia. The research was carried out for four years in the feed crop rotation link: a long-term (20-25 years) grain-grass layland — oats (corn) for green mass by the method of field experience of B.A. Dospekhov. Methods of water-physical and agrochemical studies were used in the performance of the work.Results. It is established that on long-term laylands (20-25 years) soil compaction, low moisture content and mineral nutrition elements are noted. The influence of the complex application of continuous herbicides (Tornado 500, Sprut Extra) and processing technology on the water-physical and agrochemical properties of the soil has been revealed. During summer tillage of a long-term layland and introduction of herbicide, there is an accumulation of moisture, nitrate nitrogen. In the arid steppe zone, the technology with tillage of a long-term layland to a depth of 18-20 cm increases the productivity of the feed crop rotation link by an average of 25.5-32.7% compared to technological operations involving small-scale processing (12-14 cm and 14-16 cm).