| 摘要 |
<p>The invention relates to a substrate for the cultivation of seedling and particularly to substrate blocks, about half of the weight of which is sphagnum peat dried to a moisture content of 25 - 30 per cent by weight. According to the invention, the sphagnum peat is sieved when dry, so that at least half remains on a 1-mm and at least 15 per cent by weight on an over 4-mm sieve, and it contains 5 - 50 per cent by weight of coarse material, for example fibres. The invention also relates to a method for manufacturing substrate blocks from such dried peat, in which the sphagnum peat is sieved after drying and the blocks obtained are covered with a stretchable net, film, or glue membrane.</p> |
