Foliar fertilization of asparagus
Among the vegetable varieties the asparagus as multi-annual culture has a special status. For a economically successful asparagus cultivation it is important, that the farmer ensures that the plants recover optimally after cutting. A healthy and well nourished foliage is the presupposition. So it is guaranteed that the used reserve carbohydrates are reformed. Therefore a regular and sufficient water supply is necessary.
Asparagus plants store substantial amounts of nutrients in their extensive system of reservoir roots. So that this system can be formed already from the moment of plantation, all required nutrients should be available for the plant in the complete root space. So it is necessary that no soil compressions or waterloggings impair the root growth.
Even if the soil is supplied optimally with nutrients, the need-based care of the asparagus plant with major-, secondary- and trace elements is not always safed. Many factors limit the availability and admission from the soil, e.g. high pH values with trace elements and low pH values with major- and secondary elements, aridity, cold weather, soil compressions and / or waterloggings and antagonisms (reciprocal effects) between the elements (e.g. a too much of potassium limits the availability and admission of magnesium).
The continuous supply of the asparagus plant with magnesium, manganese and boron is particularly important throughout the season. With a deficiency of these elements the asparagus reacts quickly with decrease of the assimilation performance (magnesium, manganese) or with the deterioration of the bar quality (boron).
Resistance and vitality with phosphonates
As in many other cultures the application of potassium phosphonates has proved itself in practice since many years. Multiple applications of Lebosol®-Kalium-Plus or Lebosol®-Magnesium-Plus support the plant defence promoter and keep the leaf quality and –health. By an increased formation of phytoalexins, a cell wall thickening and a stimulated enzyme synthesis the plant becomes less susceptible for a fungal infestation.
Foliar fertilization of asparagus
To compensate nutrient deficits, the foliar fertilization is a suitable agent. Particularly on sandy, light acid soils, on which asparagus is mainly cultivated, and on soils with a high potassium content, as well as with cold and wet, a magnesium deficiency occurs. A magnesium lack appears with yellow phylloclades, which wither and die back. Here the foliar applications with the fluid, particularly compatible Lebosol®-Magnesium 400 SC will prevent. As an undersupply with sulphur can occur also at the same time, the combined application of magnesium + sulphur in form of Lebosol®-MagSOFT SC presents itself.
A boron deficiency in asparagus leads to hollow bars. In certain years, this means a failure of up to 20 % in the area of marketable goods, Therefore, please guarantee a sufficient boron supply. 2 – 3 applications with 2 - 3 l/ha Lebosol®-Bor is enough to cover the need. As calcium is a quality defining element as well, you can complete this application also with Lebosol®-Robustus SC (100 gs B/l + 215 gs Ca/l).
Magnesium-deficiency on Phyllokladien
Replantations and hair game
Aminosol® is gained out of animal protein from the food production. This protein is altered on a enzymic basis into amino acids This creates the typical Aminosol® -smell. Hair game perceives this smell far more intensely and feels much more unpleasant than human beings.