Abstract: Compared with Shanyou 63, the characters of antioxidation system in a new-developed rice hybrid Liangyoupeijiu seedlings under dry raising conditions was studied. The results showed that activities of SOD, POD and CAT in Liangyoupeijiu seedlings under dry raising conditions were higher than those of seedlings under water raising conditions. In terms of MDA content and producing rate of O₂^· in seedling, there were not notable differences between dry and water raising conditions. Proline content was accumulated more in seedlings under dry raising conditions than seedlings under water raising conditions. Which enhanced ability of rice at repelling dry, at the same time, made material bases for dominance growthing in field. The study suggested Liangyoupeijiu displayed its potentiality of light energy inversion better under the high activity of antioxidation system, which was one of the physiologic bases on high yield. And study suggested it was good that the time raising seedling was thirty days or can' t get good seedling.

Key words: high yield hybrid rice, Liangyoupeijiu, antioxidation system, dry raising