Foliar fertilization in fruit-growing
The foliar fertilization with micro-nutrients (e.g. manganese, iron, boron, magnesium) is well established since many years. Foliar fertilizers can be used preventive as integrated part of the fertilizer strategy or if it comes to an undersupply with nutrients and visible symptoms.
The leaf analysis can help to analyze and recognize the availability for each element.
Many parameters in the soil can limit the availability of nutrients – high pH-values can block micro-nutrients, low pH-values can block macro-nutrients. But also dry and cold weather conditions, soil texture and some nutrient antagonism (e.g. oversupply with potassium vs. magnesium and calcium) can lead to a deficiency of nutrients.
Specific requirements for soft fruits
Cultivation of soft fruits has strongly grown over the last few years. All bush berries, especially currants, are very sensitive to chloride. Blueberries are requesting a low pH value of soil. The problem is, that the soil pH value is influencing the nutrient availability – low pH values can lead to macro nutrient deficiency and high pH-values can limit the availability for micro nutrients. Especially a deficiency with iron and / or manganese will cause yellowing of the leaves (chloroses).
Calcium-deficiency in blueberries
Fruit quality and shelf life
Lebosol®-Calcium-Forte SC, free of chloride, will improve the calcium concentration in the fruit and enhance quality and shelf life. Besides that, Lebosol®-Calcium-Forte SC is containing the micro nutrients manganese and zinc as well.
Soft fruits are susceptible to iron chloroses. An iron deficiency will be visible by yellowness of the youngest leaves with dark veins. Different paramters, e.g. soil structure, moisture and pH value will influence the iron availability. The foliar fertilizer Lebosol®-Eisen-Citrat GOLD – containing iron and manganese - will enhance the iron and manganese supply and availability. For better spreading and uptake, the product is containing amino acids as well.
Iron-deficiency in goosberries
Boron-deficiency in blueberries
Flowering, fruit setting & yield
The application of Aminosol® before the flowering will enhance fruit setting and fruit growth because of the combination of amino acids and the auxine effect.
Boron in combination with calcium (Lebosol®-Robustus SC) and zinc (Lebosol®-Zinc 700 SC) are crucial for the pollen tube growth, flowering and the fruit setting. These products should be applied before the flowering.