陶粒（也称为 hydroton、LECA - 轻质膨胀粘土骨料或粘土球）是通过在回转窑中烧制粘土制成的小而多孔的球。它们是一种流行的惰性水培生长介质，可为植物根系提供出色的排水、通气和物理支撑。
关键事实
- Inert, pH-neutral, and chemically stable — do not break down over time
- Excellent drainage prevents waterlogging; high porosity supports root oxygenation
- Reusable after sterilisation — wash, soak in diluted hydrogen peroxide, and reuse
- Used in net pots for NFT, DWC, Kratky, and media-bed systems
- Lightweight relative to soil or gravel — ideal for stacked or vertical systems
- Rinse thoroughly before first use to remove clay dust that can clog pumps