Cellulose-decomposing activity of soil biota in field crop rotations

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The article presents the results of long-term experiments to study the biological activity of sod-podzolic soil in field crop rotations. It is established that the greatest activity of cellulose-destroying microorganisms on the natural background of fertility is observed in the II fruit-bearing crop rotation, with the introduction of manure for potatoes -54.7 %. The lowest biological activity of the soil for 90 days was observed in the grain-grass crop rotation (83% of cereals) – 43.4 %. The application of mineral fertilizers at a dose of N60P60K60 for pre-sowing cultivation significantly increases the biological activity of the soil in relation to the non – wind background, and a fairly high rate of decomposition of flax was observed in the second fruit - bearing crop rotation – 24.9% for the first 45 days, 56.8% for 90 days. The correlation analysis (1998-2019) between the average decomposition of linen under crops for the entire growing season and the value of the hydrothermal coefficient (GTC) showed a close direct relationship, which in the first period of exposure (45 days) was 0.87… 0.90, in the second period of exposure – 0.86 … 0.89.