Demand of cereals on micronutrient supply
Our types of cereals, including wheat, barley, rye, triticale and oat have a strong demand in a micronutrient supply compared to the main nutrient’s nitrogen, phosphorus, potassium and sulphur. Based on an average yield of 80 dt/ha, the nutrient removal of manganese will be 600 to 1000 g/ha, copper around 50 to 150 g/ha, zinc roughly 250 to 350 g/ha and boron around 50 to 100 g/ha. When viewing the extracted amount, these micronutrient removals seems to be low.
Even with a sufficient level in the soil and an application of manure - analysis of many field crops show symptoms for undersupply with nutrients, which is confirmed by many plant analyses of cereals done in the last years in Germany. There are many different reasons for the undersupply with main and micro-nutrients. Most important will be the nutrient availability in the soil solution
Soil-pH-value and weather conditions
Micro-nutrients, except molybdenum, are less plant-available especially with high pH values in the soil. But also dryness, warm weather conditions, soil wetness or cold temperatures can reduce the availability and the uptake of nutrients. The application from micro-nutrients via the soil will be less effective. The foliar application with micro-elements, e.g. manganese, will be the most efficient way and is already established in agriculture. To save time and work, foliar fertilizer can be used and applied in combination with crop protection products. This will make the application of micro-elements in autumn and spring as simple as possible.
Combination of manganese, copper and zinc in cereals
As already mentioned, manganese, copper and zinc are the most important micro-nutrients in cereals. Due to the synergism of these three elements, a so-called „sleigh effect“ has shown, which means that the uptake of one of these nutrients will be much higher due to the application of the other micro-nutrients. A combination of these three nutrients can be achieved with the application of Lebosol®-Triple SC or Lebosol®-QuadroS SC. Best efficacy will be achieved with an autumn and spring application. Under specific circumstances and soil conditions (high humus content, pH-values higher than 6,5) could be a separate and additional application with manganese (Mangan 500, Mangan Gold) necessary.
Improving resistance against diseases
There are no registered fungicides for an autumn application in cereals available. As an alternative, the foliar application with VITALoSol® GOLD SC will strengthen the plants against unfavourable weather conditions and diseases. The combination of sulphur, copper and manganese in VITALoSol® GOLD SC will have a positive effect on winter hardiness, stress and disease tolerance.
Crop sensitive and salt-free ear treatment
The formulation Lebosol®-MagSOFT SC has been developed especially for late application. This suspension is much more sensitive to the leafs compared to granulated magnesium sulphate products. Field tests have shown a much higher nutrient efficiency compared to unformulated magnesium sulphate products.
To enhance protein with magnesium and sulphur
Leaf analysis have shown an increase of undersupply of sulphur in winter cereals. This is caused by the decline of sulphur entry from the atmosphere and strong leaching by heavy rain falls. In spring time the undersupply will be visible on young leaves with a light-yellow discoloration.
Not to confuse it with an undersupply of nitrogen – this will be visible on older leaves.
To a sufficient fertilization with sulphur containing granulars via the soil additional foliar application with Lebosol®-Schwefel 800 SC or Lebosol®-MagSOFT SC in EC 31/32 will enhance yield and quality.
An optimal sulphur supply will enhance the N-utilisation, increasing yield and reduce the nitrogen surplus. The very late application of magnesium and sulphur in wheat to the ear treatment will enhance the proteain containt.
Formulated suspensions will have economically and agronomically advantage for the farmer.