INFLUENCE OF MINERAL FERTILIZERS ON THE MICROBIOLOGICAL ACTIVITY OF THE SOIL AND WINTER WHEAT YIELD
2020
Turusov, V.I. | Piskareva, L.A. | Bocharnikova, E.G.
The article presents the results of three-year observations in the conditions of the South-East of the cdz for the influence of various doses of mineral fertilizers on the biological activity and productivity of winter wheat. Increasing the level of fertilization of winter wheat contributes to increasing the biological activity of the soil. The increase in the total number of soil micro-organisms was observed mainly due to an increase in the group of bacteria that accumulate organic nitrogen compounds (MPA) and an increase in the number of ammonifiers and bacteria that assimilate mineral nitrogen (KKA). Against an increased background of fertilization, the growth of the number of bacteria growing on MPA was 16.8 and 30.1% for the phases of development of winter wheat plants, and the number of bacteria growing on KKA was 18.7 and 12.2%, respectively. In General, a significant number of proteolytic and amylolytic microflora (MPA + KAA) may indicate a fairly high level of soil fertility. The increase in fertilizer application rates contributed to a significant increase in yield. The average increase in all fertilization backgrounds was from 0.20 to 0.51 t / ha. The highest productivity was registered at the increased level of fertilizer N50P50K50+N30-0.51 t / ha. Further increase in fertilizer rates led to a decrease in yield.
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