Unverified85% confidenceTradeoffTime unknown
珍珠岩粒径越大透气排水越强但保水保肥越差，两者不可兼得；耐旱多肉选粗粒(4-6mm)偏干爽，喜湿观叶植物选细粒(2-4mm)保水更好
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Unverified园艺种植用珍珠岩优选3-6mm粒径，粒径过细(<2mm)易随浇水粉化板结、失去透气性；粒径过粗(>8mm)保水保肥能力差、幼苗易缺水86% similarUnverified蛭石保水能力越强（大颗粒、高膨胀）越适合怕旱植物，但透气性相对下降；喜干燥或多肉植物应减少蛭石用量或改用珍珠岩替代83% similarUnverified粒径越大透气排水越强但保水保肥越差，多肉/兰花等怕涝植物用大颗粒(4-6mm)，喜湿植物或穴盘育苗需搭配蛭石提高保水83% similarUnverified颗粒越大排水透气越强但保水性越差，多肉和怕涝植物选中大颗粒，喜湿植物或育苗需搭配蛭石/泥炭平衡保水80% similarUnverified纯腐叶土保水强但透气差，长期单用易板结沤根；建议按腐叶土:园土:珍珠岩(或粗砂)=5:3:2配比使用，喜湿植物可提高腐叶土比例至6成79% similar
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