Abstract
Goal. To study the dynamics of labile organic compounds of light gray forest surface gleyed soil in the process of spring barley vegetation depending on the long-term application of different fertilizer systems and periodic liming. Methods. Field research, physicochemical and comparative analytical. Results. The content of labile humus in the arable layer of acidic light gray forest soil is insignificant and does not exceed 0.73%. Mineral fertilizer systems with long-term use cause the lowest content of labile humus compounds, which does not exceed 0.50% during the growing season. Application of organomineral fertilizer systems with application per 1 ha of crop rotation area of one norm of mineral fertilizers (N65P68K68), 10 t/ha as manure on the background of liming with a dose of CaCO3, calculated on hydrolytic acidity and acid-based buffering provides during the growing season almost the same contents of labile (0.49 – 0.60%) and water-soluble organic (0.025 – 0.042%) matters. The lack of fertilizer during the spring barley vegetation caused the lowest indicators of water-soluble organic matter (0.013–0.02%) in the control variant. Conclusions. The supply of light gray forest surface gleyed soils with labile forms of organic matter under conditions of long-term agrogenic exposure varies depending on the fertilizer systems and their use.
Highlights
Soil organic matter and its component humus ensure stability of soil system and is among the most important diagnostic features of soil functioning [1]
The study of the content dynamics of labile and water-soluble humus during the growing season of agricultural crops is of great importance and allows, based on the established patterns of its change, to adjust the level of fertilization, improve existing agricultural practices to ensure the appropriate level of soil fertility and health [10, 11]
To study dynamics of labile organic compounds of light gray forest surface-gleyed soil during vegetation of spring barley depending on long-term application of different fertilizer systems and periodic liming
Summary
Soil organic matter and its component humus ensure stability of soil system and is among the most important diagnostic features of soil functioning [1]. Despite low absolute content (1–5% of the total organic carbon content), it determines soil microbial activity, actively participates in soil processes, is the most accessible substrate and source material for the formation of all groups of stable humic substances, activates the mobilization of nutrients and enhances their migration ability [4,5,6]. Due to their structure labile components of organic matter are primarily affected by natural and anthropogenic factors. The study of the content dynamics of labile and water-soluble humus during the growing season of agricultural crops is of great importance and allows, based on the established patterns of its change, to adjust the level of fertilization, improve existing agricultural practices to ensure the appropriate level of soil fertility and health [10, 11]
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