准确标记好水稻主茎叶片的序次,是掌握水稻生长进度,搞好栽培测报的一个重要方法,特别是杂交水稻制种、繁殖更需用到叶龄法来安排父母本的合理播差期,以及通过叶龄观察及时调整花期。过去一般科技工作者常用点红漆的办法标记叶序,为了简便多采取隔叶标记,但做起来仍然比较麻烦。1980—1982年,我们试用字码在叶片上盖 Accurately mark the order of the main stem leaves of rice is an important method to master the progress of rice growth and improve cultivation and reporting. In particular, hybrid rice seed production and propagation require the use of the leaf age method to arrange the rational sowing of parents Period, and through the leaf age observation timely adjustment of flowering. In the past, scientists generally used red lacquer to mark the leaf sequence. For the sake of convenience, more leaf-cut marks were used, but it was still troublesome to do so. 1980-1982, we try the code on the leaf cover