| 摘要 |
<p>The growth medium consists of a homogeneous mixture of short rockwoll fibres, and short vegetable fibres, preferably peat fibres. The rockwool component preferably constitutes more than 50%, and humus material may be added, preferably composted sludge in an amount of less than 50% of the total mixture. To the mixture may also be added fertilizer, and seeds, e.g. grass seeds being bound to said fibres by a rapidly disintegrating binder. The method for producing said growth medium comprises intimately mixing long rockwood fibres, and vegetable fibres, preferably peat fibres, and possibly additional materials in a dry state in a mixer until homogeneous spheres or balls are formed which contain the components in a substantially uniform mixture, and cutting said spheres into short fibres by the aid of beating knives, a hammer mill or the like, and then conveying said medium to the growing site or to a packaging by the aid of an air jet.</p> |
