Foliar feeding of sunflower from the 6–8 leaf pair stage to the «star» stage in 2022
The 6–8 leaf pair stage is extremely important in sunflower ontogeny. At this time the main yield element of the crop, the head, is actively forming. Therefore a shortage of key mineral nutrients and stresses of various kinds adversely affect the future yield. Balanced mineral nutrition combined with integrated plant protection can ensure fuller use of the genetic potential of hybrids and so give a higher yield of proper quality.
Weather conditions at the start of summer are usually marked by many anomalies: part of the areas in the south and centre suffer from drought, while in the west and north there is partial flooding. In this year's conditions it is not always possible to carry out the planned crop care operations on time. We therefore recommend «ECOORGANIC» fertilizers that can be applied flexibly from the 6–8 leaf pair stage of sunflower to the «star» formation stage:
For the 6–8 leaf pair stage the composition ECOLINE Boron (Premium) is the best fit. Besides 140 g/l of organic boron, this fertilizer contains 10 g/l of L-α-amino acids, which help sunflower plants overcome stress quickly. The rate for one application is 0.5–1.0 l/ha.
An important role in the mineral nutrition of the crop belongs to phosphorus and potassium, which promote the formation of healthy plants. So in this phase too we recommend the universal phosphite fertilizer from ECOORGANIC - ECOLINE Phosphite (K) at a dose of 1.0 l/ha.
On soils with low content and low availability of zinc, feeding with GROS Amino-Zn (20 g/l zinc and 100 g/l L-α-amino acids) is effective. The recommended dose of this fertilizer is 1.0 l/ha. GROS Amino-Zn can be applied separately or with the addition of ECOLINE Phosphite (K) 1.0 l/ha.
Stress factors adversely affect the active development of young sunflower plants. Every stress reduces the potential yield by 5–15%! To overcome it we recommend the microfertilizer ECOLINE Phosphite (K-Amino) at 1.5–2.0 l/ha, which contains 70 g/l of L-α-amino acids that plants absorb quickly and that bring them out of stress.
