The productivity of spring wheat and the content of certain groups of microorganisms in the soil depend on nanopreparations

Relevance.  An important factor in reducing the dependence of crop productivity on various limiting factors is  the  use  of  fertilizers  and  biological  products,  which  include  nano-preparations.  The  work  studied  the effect of nano-preparations on the productivity of spring wheat and individual microbiological indicators of sod-podzolic light loamy soil when regulating the water-air regime.

Methods. The  research  was  carried  out  at  the  Gubino  agro-testing  site  (Tver  region)  on  soddy-podzolic light loamy drained soil. When the humidity in the 0–50 cm layer decreased below 70% of the PPV, the water regime was regulated by irrigation. Nanopreparations fulvohumate “Ivan Ovsinsky” and n-BoGum were used by spraying spring wheat plants of the Irgina variety. Nanopreparations were studied both separately and against the background of organic fertilizer — multi-purpose compost at a dose of 10 t/ha. Determination of  individual  groups  of  microorganisms  in  the  soil  was  carried  out  using  generally  accepted  methods  in microbiology.

Results.  During  the  three-year  experiment,  a  significant  increase  (significance  of  differences  p  <  0.05) in  the  yield  of  spring  wheat  was  obtained  in  the  variants  with  nanopreparations  relative  to  the  control. Their  use  against  the  background  of  multi-purpose  compost  when  regulating  the  water-air  regime  gave the  highest  wheat  productivity  in  all  years  of  research.  The  effect  of  both  nanopreparations  was  almost the same. The yield increase from nanopreparations relative to multi-purpose compost over an average of three  years  was  18–20%  for  irrigation  and  11–13%  for  non-irrigation  options  and  amounted  to  3.58  t/ha and 2.83 t/ha respectively. When regulating the water regime, the content of ammonifying and phosphate-mobilizing microorganisms increased, associated with optimal hydration for their vital functions. This was especially  evident  during  the  dry  period,  when  irrigation  was  carried  out.  The  largest  number  of  studied microorganisms was observed in the variants of multi-purpose compost + nanopreparations and with the addition of only multi-purpose compost. At the same time, a high connection with productivity was noted.

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