CONTROLLED-RELEASE VITREOUS PRODUCT FOR USE AS A FERTILISER

摘要

The invention relates to a controlled-release vitreous product which is characterised in that it comprises boron oxide (III) and at least one oxide of a transition metal selected from among iron, manganese, zinc, copper, molybdenum and mixtures of same. The method used to obtain said product is characterised in that it comprises the following steps consisting in: mixing the components, melting the mixture at a temperature varying between 800 and 1500°C, cooling the molten mixture such that it solidifies, grinding the solidified molten mixture, and, optionally, incorporating the vitreous product obtained into a support. The release of the components from the vitreous product under the action of water and other factors is controlled by the composition and production method thereof. In this way, the invention is suitable for use as an agricultural fertiliser.