The substrate of the plug seedling is mainly mixes of the light substrate, such as peat,perlite and vermiculite. Substrate that has different ratio has different physical and chemicalproperties, which have a strong impact on the root development and seedling growth. In the study,ten treatments that have different ratio of substrate and two commercial plug substrate mixes whichintroduced from abroad had designed to test the influence to the plug seedling. The main physicaland chemical properties such as EC, PH, and porosity are tested. The results indicate that treatmentof 10% of peat, 80% of perlite and 10% of vermiculite and two commercial plug substrate mixeswhich introduced from abroad are better than others. Seedlings have good shape, the root growthwell.
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