The assimilation surface of winter wheat under the effect of seed treatment with biological preparations

Purpose. To establish the peculiarities of winter wheat assimilation apparatus development under effect seed treatment with biological preparations.
 Methods. Research was conducted using field, laboratory and mathematical methods in 2019–2022 stationary crop rotation Department Crop Production National Academy Sciences Ukraine on typical podzolized chernozems Right Bank Forest Steppe Ukraine. The formation area application preparations for were studied use following preparations: Binok Zerno, Rizomax, Trichodermin, Planoriz, Urozhai Start. N32P32K32 fertilizer complex granular DuraSOP actibition applied seedbed preparation. leaf glumes calculated Petiole Pro program. stem determined by formula external cylinder.
 Results. flag is quite important a high yield wheat, since its loss or damage significantly reduces flow photosynthetic assimilates into plant. In particular, earing phase (BBCH 57), average 7.68 thousand m2/ha good indicators treatments Zerno Harvest Start, both separately combination. next – flowering 65) patterns preserved, although combination Start better 9.24 m2/ha. A decrease total observed as result gradual dying off leaves lower tiers, reduction possibility photosynthesis ear involved assimilation. according to experiment, 51.9 m2/ha; 51.8 milk grain ripeness 75) 29.3 surface 57) largest combined preparation 61.7 future, phases 75), obtained preserved best By end vegetation season, concentration main photopigments decreased content chlorophyll 11.01 mg/g b 3.93 mg/g. However, at earlier stages ontogenesis, increased, while per gram dry matter decreased. It established that 11.6 during 4.09 mg/ha. 65), their 11,4 4.14 mg/ha, respectively. + together Actibion ensured higher chlorophylls 16.3; 16.0 15.4 matter, respectively.
 Conclusions. seeds contributes significant increase plants throughout particular components, such leaves, blumes stems, well pigments. Established regularities plant growth are factors optimizing cultivation technology conditions