千年桐为雌雄异株植物,林地上只需保留少量雄株作为授粉树。但用实生苗造林,通常雄株达50％左右,且植株进入开花期后才能区别雌雄,此时需将大部分雄株伐去,从而影响株行距的合理配置和桐油产量。因此,千年桐雌雄植株的早期鉴定,在生产上具有重要的意义。国内曾报道过千年桐雌雄株叶部组织氧化还原能力有一定的差异,但以酶活性的强弱作为雌雄植株早期鉴定指标,尚未见报道。本试验通过测定已知性别的成年树和未知性别幼苗的叶部组织过氧化氢酶和过氧化物酶的活性。初步证 Millenia Tong is a dioecious plant, only a small amount of male plants remain on the woodland as pollinators. However, with seedling afforestation, usually about 50% of male plants, and the plants into the flowering period to distinguish between male and female, at this time most of the male plant should be removed, thus affecting the line spacing reasonable allocation and production of tung oil. Therefore, the early identification of millet Tongxiong plants in the production of great significance. It has been reported in China that there are certain differences in the redox capacity of the leaves between the male and female plants of Milicicus, but it has not been reported yet that the enzyme activity is an indicator of the early identification of the male and female plants. In this study, the activities of catalase and peroxidase in the leaves of adult tree and unknown seedlings of known sex were determined. Preliminary card