By additionally injecting fine and granulated fertilizers, nutrient gaps in organic fertilizers can be closed, e.g. by adding:
- ESTA® Kieserite fine (magnesium + sulphur)
- Nitrogen fertilizers such as urea
- Potassium fertilizers
- Fertilizers with micronutrients
- Phosphorus fertilizers
Particularly positive effects are achieved when correctly placed fertilizer deposits are created in root crops.
The container can be lowered to the ground for easy filling. The container filling quantity corresponds to a Kieserit BigPack with a standard weight of 600 kg.
The aim here is to use the magnesium from kieserite and the ammonium and phosphorus from the slurry to grow struvite crystals in the slurry belt.
Struvite has a sand-like structure with a typical nutrient composition of 5%N, 23%P2O2 and 12%MgO. Struvite is a magnesium ammonium phosphate (MAP), which has the efficiency-improving advantage that part of the nitrogen from the slurry is bound as ammonium in struvite and is protected from nitrification and leaching losses. Furthermore, the phosphate from the liquid manure in the new Struvit compound has very good citric acid solubility and thus plant availability via root exudates, on a par with triple superphosphate.
The phosphate is thus protected against ageing and remains readily available to plants. Due to its relatively high weight (bulk density 1,380 kg/m³), Kieserit fine is difficult to mix homogeneously into a 20 m³ slurry tanker, for example. The "just-in-time" introduction of Kieserit fine into the distribution head has the advantage that an exact mixture can be produced and that crystallization only begins in the soil and no sand-like deposits can occur in the spreading vehicle. The media can no longer segregate until they enter the soil.
CONCLUSIONS:
- Close nutrient gaps in organic fertilizers for Mg and S
- Improve N and P efficiency through the struvite effect
- More root growth, more vital plants and better grain filling