One of the most critical periods of corn nutrition is the phase of 4-6 leaves. At this time, the plants first of all need sufficient supply of zinc. In addition, in the season of 2021, it is necessary to pay attention to phosphorus nutrition, which is absorbed more slowly due to insufficient heat, especially on carbonate soils.
The role of zinc in the nutrition of corn is multifaceted, but the most crucial functions at the early stages of development are:
- stimulating the synthesis of growth hormones - auxins;
- release of spare nutrients from seeds;
- influence on the formation of elements of cob productivity.
To prevent or eliminate zinc deficiency in the phase of 4-6 leaves, we recommend foliar fertilization of corn with ECOLINE Zinc (Chelate) special fertilizer at a dose of 1.0 l / ha (can be applied simultaneously with post-emergence herbicides).
If phosphorus and zinc deficiency are noticeable at the same time, it is recommended to use ECOLINE Phosphite (K-Zn) 1.5–2.0 l / ha. This special composition containing phosphorus in the form of phosphite is designed to eliminate the deficiency of phosphorus, potassium and zinc and enhance the growth of the root system.
In the case of a strong manifestation of phosphorus deficiency, in particular during the cold season, or weak development of the root system, we recommend to use a combination of fertilizers for foliar nutrition ECOLINE Phosphite (K) 1.0-1.5 l / ha and ECOLINE Zinc (Chelate) 0.5–1.0 l / ha. This approach will not only help the plant to overcome phosphorus and zinc starvation and stimulate the development of the secondary root system, but also significantly strengthen the immune system of corn plants and their resistance to fungal infections. It should be noted that, according to independent studies, phosphites in the recommended doses do not lead to inhibition of vitality, but, on the contrary, contributed to the better development of agronomically valuable groups of microorganisms in the soil.
At the fields damaged by hail, it is necessary to wait for the restoration of vegetation of plants in which the growth point has been preserved, and to carry out foliar fertilization with the tank mixture of GROS Health 1.0 l / ha + ECOLINE Zinc (Chelate) 1.0 l / ha.
Manifestation of zinc deficiency
Manifestation of phosphorus deficiency on carbonate soils