The efect of bio products and fertilizers on yield structure elements and productivity of winter wheat varieties grown in the Don area

Abstract

The current  paper  has  presented  the  data  on  the efect of bio products  “Extrasol”,  “Rostok”,  “Aquamix”  and water-soluble “Aquarin 5” and  “Aquarin 9” on productivity and yield structure elements of  the  intensive winter wheat variety  “Niva Stavropoliya” and the half-intensive variety “Viktoriya” sown after oilseed fax on the fertilized felds. There has been established that the largest yields of  the variety  “Niva Stavropoliya”  (5.59  t/ha) and of  the variety  “Viktoriya”  (3.7  t/ha) were  formed under  the compound use of  fertilizers and bio products as follow: Р60К40  before sowing  (in a weedfree  fallow) and N60Р60К40  (sown after oilseed fax) + N30 in the tillering phase + N30 in the phase of head formation + “Aquamix” (0.1 l/t in seed treatment) + “Aquarin 5” (2 l/ha in the tillering phase) + “Aquarin 9” (2 l/ha in the phase of head formation). There has been identifed that the main yield structure elements of the studied varieties showed their largest values under the compound use of the bio products “Aquamix” and water-soluble “Aquarin 5” and “Aquarin 9” on  the  fertilized felds. On average  for 3 years  the variety “Niva Stavropoliya” showed  the  increase of ‘number of ears’  from 413 pcs per m2  in  the control variant, and  to 432–467 pcs per m2 in the treated variants.  the variety  “Victoria 11” had 357 pcs per m2 in the control variant and 379–415 pcs per m2 in the treated variants. In addition, in comparison with the control variants, there has been identifed an increase of other yield structure elements, namely “number of grains per head”, “grain weight per head” and “1000-grain weight”.