lisälannoituksina

Lisälannoitus, often translated as supplementary fertilization or top dressing, refers to the application of fertilizers to growing crops after their initial planting. This practice is distinct from basal fertilization, which is incorporated into the soil before or at the time of planting. The primary purpose of lisälannoitus is to supply nutrients that are needed by the crop during its active growth stages, especially when soil reserves become depleted or when crop demands exceed the nutrient supply from the initial fertilization.

This method is particularly common for crops with high nutrient requirements during specific periods of their development, such as cereals during tillering or grain filling, or leafy vegetables during rapid foliage growth. Lisälannoitus can be applied in various forms, including granular, liquid, or foliar sprays. Granular fertilizers are typically spread over the soil surface, while liquid fertilizers can be applied through irrigation systems or as sprays. Foliar application involves spraying nutrient solutions directly onto the leaves, allowing for rapid absorption.

The timing and type of lisälannoitus are crucial for its effectiveness. Farmers consider factors such as the crop's growth stage, nutrient deficiencies identified through soil or plant tissue analysis, and environmental conditions like rainfall. Applying nutrients at the right time ensures they are available to the plant when it needs them most, leading to improved yield and quality. However, improper timing or excessive application can lead to nutrient losses through leaching or runoff, potentially causing environmental pollution. It is a key strategy in modern agriculture to optimize crop performance and nutrient use efficiency.