Granulated composite fertiliser

摘要

The present invention relates to a granulated glass-lined composite fertiliser in the form of multilayered granules. Each layer includes a main nutritive component for plants containing compounds, distinctively, of phosphorus and potassium in a mixture with micro-fertilisers. Each group of layers of phosphorus compounds and potassium compounds requires a one-year period to be dissolved. The number of groups of layers corresponds to the desired number of years during which the entire fertiliser granule should operate.