Abstract
The nitrogen mineralization capacity of soils characterizes the rate of organic nitrogen-containing compounds decomposition and reflects their ability to accumulate mobile mineral nitrogen, an objective indicator of the availability of this major nutrient to plants. We have studied gray forest soil (Luvic Greyzemic Phaeozem), widespread among Siberian crop fields, using laboratory (composting under optimal conditions) and field (fallow under natural conditions) techniques to get new agrochemical data on the quantitative and qualitative changes in soil nitrogen compounds and nitrogen-containing fertilizers. The decomposition kinetics of available nitrogen and its release from plant residues (melilot, rapeseed, winter rye, and straw) during the interaction with gray forest soil are determined. The CO2 emission, nitrogen content in microbial biomass, cellulolytic bacterial activity, and accumulation of mineral nitrogen species have been monitored. The role of plant biomass in maintaining the nitrogen status in field agrocenoses is experimentally shown.
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Gamzikov, G.P., Suleimenov, S.Z. Nitrogen Mineralization Capacity of Gray Forest Soil of the Novosibirsk Ob River Region during Composting and Fallowing of Plant Residues. Eurasian Soil Sc. 54, 729–737 (2021). https://doi.org/10.1134/S1064229321050082
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DOI: https://doi.org/10.1134/S1064229321050082