Novel preparation method of soilless culture medium

Abstract

The invention relates to a novel preparation method of a soilless culture medium, which is characterized by comprising the following steps: mixing 10-30 wt% of 0.5-300 mu m glass powder, 1-15 wt% of cosolvent, 80-25 wt% of ceramic powder and 9-30 wt% of pore increasing agent, and grinding into a uniform powder mixture; and firing the powder mixture at 600-1100 DEG C for 1-4 hours, crushing and screening to obtain the soilless culture medium. The pore increasing agent is one or mixture of coal powder, crop straw fine powder and herbal plant fine powder; the ceramic powder is one or mixture of coal gangue, red mud, polished brick waste and waste ceramic tile powder of which the particle size is 0.5-5 mu m; and the cosolvent is sodium fluosilicate or sodium silicate, or mixture of sodium fluosilicate or sodium silicate in any proportion. The pore size of the soilless culture medium can be controlled at 0.1-0.5mm; the pores are uniformly distributed inside and outside and form interlocking pores; and thus, the soilless culture medium has favorable water retention property.

Description

technical field [0001] The invention relates to a novel preparation method of a soilless culture substrate, which belongs to the technical field of porous ceramic preparation technology. Background technique [0002] Soilless culture substrates are mainly used for biological cultivation and growth. Generally, organic plastics or organic foams are used. Perlite and granite small stones are made in a certain proportion, or waste burnt bricks are used to break into granules. The use of organic plastic or organic foam has the problem of environmental pollution, and the use of perlite and granite small stone rice or the use of waste burnt bricks to break into granules has problems such as poor water retention. Contents of the invention [0003] The purpose of the present invention is to provide a novel preparation method of a soilless culture substrate that can overcome the above-mentioned defects, have uniform distribution inside and outside the aperture, no pollution, no leak...

AI Technical Summary

Problems solved by technology

The use of organic plastic or organic foam has environmental pollution problems, and the use of perlite and granite small stone rice or the use of waste burnt bricks into granules has problems such as poor water retention.