(Krasnoyarsk State Agrarian University, Krasnoyarsk, RUSSIA).
Disciplinary: Agriculture Science.
Keywords: Organic farming; Agrochernozem soil; Spring wheat; Soil humus; Mobile humus compounds; Clay illuvial; Organic farming system.
The results of a field experiment to assess the structure and reserves of humus substances in clay illuvial typical agrochernozem of the forest-steppe of Central Siberia during the transition to an organic farming system are presented. Spring wheat was cultivated on an intensive background with the use of ammonium nitrate and chemical protective agents as per clean fallow as the predecessor with the conditions of an organic farming system - on a treated turf bed of 27 years of age. It was shown that in the spring period, the treatment of the long-fallow ecosystem led to an increase of water-soluble humus by 20% and alkali-hydrolyzable humus substances by 49% in the 0-20 cm layer of agrochernozem. The processes of plant residues' transformation of the long-fallow ecosystem during the growing season significantly replenished the content of humus substances and their alkaline hydrolyzable fraction in the soil. The increase in Chumus compared to the spring period was 283 mgC/100, CNaOH 559 mgC/100g. The structure of humus substances in agrochernozem after wheat cultivation with a long-fallow precursor showed an increase in the mobile humus part by 11%. In the conditions of fallow precursor, stable humus compounds accounted for 86% of the Chums reserves in the 0-20 cm arable layer. For long-fallow, they were reduced to 75%. It was found that during the cultivation of spring wheat on the treated long-fallow, replenishment of humus stocks up to 125 tC/ha, and the mobile part of humus 31 tC/ha was noted.
Paper ID: 13A4U
Cite this article:
Kurachenko, N.L., Bopp, V.L., Kolesnik, A.A. (2022). Reserves of Humus Substances in Agrochernozem in Organic Farming Conditions. International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies, 13(4), 13A4U, 1-07. http://TUENGR.COM/V13/13A4U.pdf DOI: 10.14456/ITJEMAST.2022.84