| 摘要 |
The invention relates to the field of crop substrates or supports to be mixed with soil or to be used as a development medium for crops out of soil. Pelleted expanded blast furnace slag with a particle size of between 0 and 15 mm and containing at least 30 % of total porosity is employed. An acidic material such as, for example, peat may be added to the slag to buffer the pH at 7. The slag granulate is advantageously mixed with inorganic fibres including metallurgical slag fibres, for example of a composition modified to have a basicity value (B = CaO + MgO/SiO2 + AlO3) of between 0.4 and 0.8. Application to all crops in situ or out of soil. |
