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Pearlite, vermiculite and coal cinder are all used as additives in culture soil, which is more conducive to the growth of flowers.

Perlite, vermiculite and coal cinder can be used as an additive to cultivate soil, which can improve the physical properties of the soil, and make the soil more porous, breathable, and water preserving perlite are heated to more than 1000 degrees centigrade, and have a closed porous structure. Light quality, good ventilation, no nutritional components. It is easy to float in the course of use, and the stone is silicate material, which expands at 800-1100 high temperature. The surface numbers of different types of combined culture soil are sold on building materials stores.
It is easy to be crushed and compacted in the culture soil, resulting in poor ventilation and drainage performance. It is best not to be used as a long-term potted plant material. As a matrix for cutting beds, large particles should be selected and the use time should not exceed 1 years. Cinder as a potting medium is best to be crushed and sieved, and the powder and larger blocks below 1 mm are removed. It is best to use 2~5 millimeter pellets and other potted soil for use or separate use. Sphagnum and fern root and sphagnum are bryophytes that grow on damp ground in alpine regions. There are distribution in the northeast and southwest plateau forest areas in China. Sphagnum is very loose and has a very strong water absorption capacity; it is a common cultivated and packaged material in flower gardening; it is one of the best potted substrates for foliage plants, pineapple plants, orchids and insectivorous plants, often with ferns, snakes, bark blocks, and volcanic ash, which are used in ferns to refer to the rhizome of the fern. Root, black brown, about 1 mm in diameter.
It is very resistant to decay, and it is the most commonly used potted substrate for the cultivation of many foliage plants, especially the tropical epiphytic flowers, which are often used in combination with mosses. The resources of the northeast and the southwest of China are very rich. In addition, the stem and root of the tree of the tropical forest also belong to this kind of material, which is often called snake wood. It is broken into block or sawdust to plant tropical epiphytic foliage plants. It is also a very ideal material.
It is often used in conjunction with bryophytes, which is breathable, well drained and has strong moisture retention. Due to the area of tropical rain forest in China, the species has been listed as a national protected plant species and can not be easily harvested. The bark of the tree is mainly oak bark, pine bark, longan bark and other thick and hard bark. It has good physical properties and can replace ferns, moss and peat as the substrate for epiphytic plants. Now it has been widely used as a good potted substrate in many parts of the world, and has been sold as a by-product of forest development. After breaking into 0.2-2.0 centimetre blocks, it is sifted into several sizes according to different diameters. Small particles can be mixed with peat to plant general potted flowers; large sizes are used to plant epiphytic plants and various foliage plants.



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