THE ROLE OF LEGUME PREDECESSORS IN THE ACTIVATION OF BIOLOGICAL ACTIVITY OF GRAY FOREST SOIL
2019
Gurin, A. G. | Chadaev, I. M.
The article presents the results of studies to determine the biological activity of gray forest soil on winter wheat crops after legume predecessors: peas, lupine, vetch+oats grown for grain and green manure. As a control, pure fallow was taken, into which 20 t/ha of cattle manure was introduced. Predecessors influenced the activity of decomposition of linen cloth. The smallest amount of decomposed tissue was in the control variant after clean fallow-27.6%. After leguminous predecessors microbial activity was higher. The percentage of decomposition in the soil layer of 0-10 cm was 32.4-44.6%. The lowest indicators of biological activity of the soil were in variants with legumes plantings for grain. The degree of decomposition of linen tissue in the soil layer 0-10 cm was 22.4-28.8 %. Ploughing in of green manure of different types of legumes had a slight effect on the activity of urease-0.16-0.22 mg NH3, relative to the control variant. After growing legumes for grain, urease activity was below the control value of 0.14-0.16 mg NH3. In variants with the ploughing in of legumes for green manure, catalase activity increased relative to the control variant by 1.33-1.60 times, in variants with the cultivation of legumes for grain by 1.28- 1.40 times. There is a tendency to increase the activity of invertase in variants with the cultivation of legumes for green manure
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