Journal of Bio-Environment Control (생물환경조절학회지)
- Volume 9 Issue 1
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- Pages.20-26
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- 2000
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- 1229-4675(pISSN)
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- 2765-3641(eISSN)
Analysis of Physical and Chemical Properties of Perlite Substrate
펄라이트 배지의 물리성과 화학성 분석
Abstract
This study aims at analyzing physical and chemical properties of perlite substrate. Particles of substrate were divided into five categories In size: gravel, very-coarse, coarse, medium and fine grade. Particles of very-coarse and greater grades in perlite substrate occupied 98.5% of total particles. The air phase of total particles was distributed between 76.8% and 87.7% with especially showing that of very-coarse grade was lower than that of coarse or smaller one. However, the liquid and solid phases were vice versa. The cation exchange capacity (CEC) measured was highest in the fine grade. In drainage experiments, the water being drained from the substrate increased with the ratio of drain area, and the 65~70% of total water reduced within five minutes after irrigation. The drained volume was proportional to the depth of the substrate, which contained about 2mL.cm
본 실험은 펄라이트의 물리성, 화학성 및 배수 특성을 구명하고 이를 근거로 배지내 적정 수분관리를 시도해 보고자 수행하였다. 입자 분포를 5단계로 분류하였고, very-coarse 이상의 입자들이 98.5%를 점유하였다. 물리적인 특성은 very-coarse 이상의 입자들이 coarse 이하의 입자들보다 기상 비율은 각각 76.7%와 87.5%로 낮았지만, 고상 비율은 각각 13.2%와 7.0%, 액상 비율은 각각 10.2%와 5.5%로 높았다 양이온치환용량은 fine 입자가 1.867 me.100g