Vermiculite, soilless cultivation, horticulture, vermiculite, the use of coarse?
As a kind of seedling vermiculite, its main function is to increase the aeration and water retention of soil (medium). Because of its fragile, with the use of time to extend, easy to medium dense and lost ventilation and water retention, so coarse vermiculite better than the use of long time, and the effect is good. Therefore, the vermiculite should be chosen as a thicker sheet of vermiculite, even for the seeding medium of small seeds and for the covering of seeding.
Vermiculite is a kind of mica material which is formed when the silicate material is heated at high temperature. In the course of heating, water loses rapidly and expands, and the volume after expansion is equivalent to 8-20 times of the original volume. Thus, the aeration pore and water holding capacity of the substance are increased. 2. the density of vermiculite was 130-180 kg / cubic meter, and it was neutral to alkaline (ph7-9). Vermiculite can absorb up to 500-650 liters of water per cubic meter of water. After steam disinfection, can release the appropriate amount of potassium, calcium, magnesium.
There are two conventional specifications for raising vermiculite: 1-3mm (seedling raising, horticulture, vermiculite), 2-4mm (seedling raising, vermiculite), and various types of seedling vermiculite according to customer requirements. Seedling vermiculite is made of expanded vermiculite specially made.
