Сільське господарство та лісівництво

Tsyhanska Olena,   candidate of agricultural  sciences,  associate  professor,  associate   professor  of the department  of  forestry   and  landscape  management  of  Vinnytsia  National  Agrarian  University . (21008,  Vinnytsia,  Soniachna  Str. 3, e-mail: lenkatsiganskaya@gmail.com. ORCID : https://orcid.org/0000-0002-4046-1034).

Mashenko Vitalii, post  graduate  student of the  department  of   forestry and landscape  management  of   Vinnytsia  National  Agrarian  University (21008,  Vinnytsia,  Soniachna Str. 3, e-mail: mashenkovitalii094@gmail.com. ORCID: https://orcid.org/0009-0004-6914-5184).

According to the  research  results,  the  peculiarities of the influence of the  technology of growing different varieties of  soybean on  the  dynamics of the  formation  of the  number  of  active nodules on the roots of soybean plants were determined and analyzed.  It  was  established  that for both studied varieties of  soybean  Artemida and  Monroe,  the use of  bioinoculant in  combination  with  the  mycorrhizal- forming  biological  preparation  Mycofriend and the  biofertilizer  Groundfix  Extreme  significantly  increases the  number  of  active  nodules on  the  roots  compared  to the  control (Bioinoculant-BTU). The indicators of the  number of  active  nodules  reach a  maximum  when  using the  combined  treatment of  seeds and  soil  Mycofriend ( 1.5 l / t of seeds ) +  Groundfix  Extreme   ( 4 l / ha).  In  particular, in the  Artemida  variety at the  beginning of  the  growing  season − 13.7 pcs / plant,  and in  Monroe −  12.6 pcs. / plant.  All  options  demonstrate  the  dynamics  of the  increase in  the  number of  nodules from the  phase  of the 3rd  trifoliate  leaf to the end of  flowering.  The  highest  value is  observed in the  end of  flowering  phase –  34.2 pcs./  plant in the  Artemida  variety  with  combined use of the  studied  biological  products. All  variants  demonstrate the  dynamics of the  increase in the numbe r of nodules from the  3rd  trifoliate  leaf  phase to  the end of  flowering.  In  addition, in  accordance  with the  research  program,  we  established the  features of the  formation of the  mass of  active  nodules on the  roots of  soybean  plants  depending on  the  pre-sowing  treatment of  seeds and  soil. The  maximum mass of  active  nodules  was  observed in  the  end of  flowering phase in  the variant  of the  experiment  with t he  comple x  use of  biological  products  Bioinokulant-BTU  (3 kg/t of seeds) +  Mikofrend (1.5 l/t of seeds) + Groundfix  Extreme ( 4 l/ha). The results of  the  studies  also  indicate  an  increase in the  indicators  of the  active  symbiotic  potential  with the  combined  use  of the studied  biological product s.  In the initia l  phases of  development (3rd trifoliate leaf)  in the  control  variant  where  inoculation  was carried out  with the drug  Bioinoculant−BTU (3 kg/t of seeds),the  value of the  active  symbiotic  potential  was  recorded  in the  Artemida  variety  of 0.282 thousand  kg day/ha  and in the  Monroe  variety  of 0.369  thousand kg day/ ha.  In the  va riants  with the  addition of the  mycorrhizal- forming  biological  product  Mycofriend,  an  increase in  the indicators to  0.297 and  0.542  was  noted in the  Artemida and  Monroe varieties,  respectively. The  maximum  indicators in  different  phenological  phases of  growth and   development of   soybean  plants  were  observed  when  using  the  combined treatment of  seeds and  soil with the  biological  products  Mycofriend ( 1.5 l/t of  seeds) +  Groundfix  Extreme  (4 l/ha).

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