Recommendations on winter crop application during growing season in autumn
The main task of an agronomist in autumn is to obtain even and uniform seedlings of winter crops. Unfavorable weather conditions, such as sudden temperature fluctuations and frosts above ground during the autumn vegetation period worsen nutrient intake by the root system, lead to deficiency of nutrients and inhibition of physiological processes in plants. As a result, at the end of the vegetation period we get crops in the phase of "pip – 3 leaves" (ВВСН 10-13), which does not correspond to the criteria of the optimally developed plant before entering the winter season (3-4 shoots, well developed root system, the amount of soluble carbohydrates in the tillering nodes is more than 40%).
To activate the growth processes of winter crops in the autumn growing season and increase the adaptability of plants to a complex of harmful factors in the winter period, the scientists of the DOLINA Group recommend using plant growth stimulator VIMPEL® (application rate 0.5 L/ha) and complex microfertilizer ORAKUL® multicomplex (application rate 1.0 L/ha) during foliar feeding.
The plant growth stimulator VIMPEL® contains polyhydric alcohols, humic and carboxylic acids. Each of the components of the formulation performs an appropriate function, which in conjunction have an effect aimed at enhancing the adaptation of winter crops to unfavorable weather conditions of wintering.
The microfertilizer ORAKUL® multicomplex contains a balanced set of macro- and microelements in accessible to plant forms, which ensures a rapid elimination of the nutrient shortage even under unfavorable weather conditions (fall of temperature), when their availability in the soil is sharply reduced.
The tank mixture of formulations VIMPEL® + ORAKUL® multicomplex activates growth processes in plants, which leads to an increase in the area of the photosynthetic surface and tillering ratio in cereals, activation of growth and development of the root system, thickening of the root neck of rapeseed. Plants manage to accumulate a larger amount of reserve substances, due to which the concentration of cell sap increases and plants are less damaged by the influence of low temperatures.
The treatment of spiked cereals with such a tank mixture can be conducted as early as at the beginning of tillering (after formation of the 4th leaf). On winter rapeseed crops – after the formation of 2nd – 3rd pair of leaves.
In comparison to other crops rapeseed plants require a lot of boron for growth and development. 25% of the total amount of this microelement rapeseed absorbs in autumn, the rest – in the phase of bud differentiation.
Due to the treatment of rapeseed crops with boron fertilizers during the autumn vegetation, an elasticity of the tissues increases, thus protecting stems and root necks of the plant from cracking during frosts and intensive growth period. This in turn contributes to reducing plant damage by diseases (necrosis of the root collar, vercilicosis, etc.). In addition, boron affects the development of root system, contributes to a better recovery of spring vegetation. To eliminate the boron deficiency we recommend adding ORAKUL® colofermine of boron (application rate 1.0 L/ha) to the tank mixture VIMPEL® + ORAKUL® multicomplex. The preparation also includes cryoprotectants, which provide plants with additional protection from low temperatures.
Wintering of winter crops is one of the most important agronomic problems in the production of grain, which must always be taken into account and we should find means to minimize its harmful effects. In autumn, at temperatures of 8-15 °C, the productivity of photosynthesis is still very high. This time should be used as efficiently as possible to form optimally developed plants and create conditions for successful wintering. Because plant damage caused by low temperatures is the main cause of poor plant density, and in some years even complete freezing of crops on considerable areas, which leads to additional costs for replacement of lost seed material, re-cultivation of fields, re-sowing: replacing dead crops with spring ones and the like.
In addition, under such conditions sowing season plans are violated, which leads to a delay in the spring crop sowing and decrease in their productivity.