Development of artificial soil by advanced materials for the greening of artificial ground.

摘要

A new process was developed for manufacturing porous glass to be used as a domestic Korean substitute for expensive moss peat and coir. The study also aimed to develop an artificial soil that will be suitable as a substitute for perlite in landscapeplantings. The porous glass was produced by mixing waste fine-grained glass powder with foaming agent and pigment, and heating at a temperature from 750 to 850℃. The physical and chemical properties of the crushed porous glass are compared with those of fresh and aged bark, moss peat and coir. The bulk density of the crushed porous glass was 0.43 g cm-1. The saturated hydraulic conductivity was high, but the water holding capacity, cation exchange capacity (CEC), and the nutrient contents were low. The bulk density of bark was 0.30-0.39 g cm-3. The saturated hydraulic conductivity, water holding capacity, CEC, and nutrient contents were high. The physicochemical properties of bark remained satisfactory after an 11-month incubation period. Crushed porous glass was mixed with bark in volumetric basis of 8:2, 7:3, 6:4, and 5:5 to determine the optimum ratio for the artificial soil. The mixtures were compared to mineral soil, perlite small grain, and perlite large grain, in terms of physical and chemical properties and growth (leaf fresh weight, leaf length, total leaf number, total leaf weight, shoot length and weight, and stem and root weight) of Ligustrum obtusifolium and Syringa vulgaris. As a result, 6:4 ratio of crushed porous glass to bark was thought to be optimum ratio, which is superior to mineral soil, perlite small grain, and perlite large grain. This mixture might be available and be a cost-effective substitute for perlite as an artificial soil for greening artificial ground.