Field trials of the effectiveness of foliar feeding systems with ECOORGANIC special fertilizers were carried out in Mohyliv-Podilskyi district at the Zolotyi Kolos farm, Vendychany village. The soil is gray forest. For sowing rapeseed the farm used the following nutrition system:

- 150 kg/ha of nitroammophoska before sowing;

- 90 kg/ha of a sulfur-containing fertilizer mixture at sowing;

- 150 kg/ha of ammonium sulfate + 200 l/ha of UAN on frozen-thawed soil;

- 200 l/ha of UAN after the resumption of vegetation.

Foliar feedings were carried out only in spring after the resumption of vegetation. The schemes for using foliar feeding fertilizers are given in table 2.

During plant growth and development, phenological observations were carried out and the main parameters of the future yield were determined. The assessment results are given in table 1.

Table 1. Results of interim assessment of winter rapeseed plants in 2018 at Zolotyi Kolos farm as of 24.05.2018.
Variants Plant height, cm Root collar, cm Plant weight, green mass, g. Root weight, g. Average number of branches per plant, pcs Average number of pods per plant, pcs
Control 140 1,4 142 15 7 139

Variant 1

Scheme from ECOORGANIC LLC

 148 1,6 219 25 9 146

Variant 2

Scheme from ECOORGANIC LLC

 150 1,7 252 23 10 163

Results of Foliar Feeding of Winter Rapeseed, 2018 Harvest, Vinnytsia Region

With unbalanced plant nutrition with microelements, and in our case a clear predominance of nitrogen over other nutrients is evident, foliar feedings even with small doses of phosphorus and potassium are important, which promote better nitrogen uptake by plants and raise their resistance to disease. This showed as taller plants with a thicker root collar, and greater mass of the aboveground part and roots compared with the control. Accordingly, plants in the foliar feeding variants formed two to three more flowering branches with a higher number of pods compared with the control variant. This tendency persisted until full ripening, as confirmed by yield assessment results at harvest (table 2).

Table 2. Effect of foliar feeding of winter rapeseed on seed yield at Zolotyi Kolos farm
Plant development stage Control

Variant 1

Scheme from ECOORGANIC LLC

Variant 2

Scheme from ECOORGANIC LLC
8–12 leaves, spring ECOLINE Phosphite (K) 1.5 l/ha ECOLINE Phosphite (K) 1 l/ha + Gros Amino Magnesium 1 l/ha
Budding ECOLINE Boron (Premium) 1 l/ha ECOLINE Boron (Premium) 1 l/ha + GROS Health 1 l/ha
Start of pod formation ECOLINE Oilseed (Chelates) 1 l/ha + GROS Quicelium 1 l/ha ECOLINE Oilseed (Chelates) 1 l/ha + GROS Quicelium 1.5 l/ha
Yield, c/ha 35,4 37,2 39,8
Gain, c/ha 1,8 4,4
Gain, % 6,4 15,6

As we expected, the more productive was the intensive foliar feeding system, which included phosphorus in the form of phosphite (ECOLINE Phosphite (K) combined with magnesium and amino acids (GROS Amino-Mg) at the start of intensive biomass growth, boron with amino acids (ECOLINE Boron (Premium) and a phytohormone complex (GROS Health) at the start of budding, which ensured better pollination of flowers. After flowering, to improve pod fill, the last feeding was done with the complex ECOLINE Oilseed (Chelates) and GROS Quicelium. The seed yield gain compared with the control was 4.4 c/ha, or 15.6%.