Abstract: The cxperiment was carried out to study the effects of various light qualities on morpllological and physiological changes of rice seedling．Seeds of the rice variety "ZHI XUAN NO.0090"（Oryza sativa L.bubsp　Keng）were sown in the fertile soil with nealy optimum supply of water in the early growing stage．The seedlings were grown for 12 days under 10 hours continuous illumination of Red（R），Blue（B），Yellow（Y），and Colorless（L）light at the average temperature of 25—28℃．

Key words: various, qualities, rice seedlings