早稻套种田菁,具有花工少,成本低,以田养田,提高地力等好处,生产实践证明,这是一项自力更生解决晚稻基肥的有效措施。近年来,我省已推广相当大的面积,受到群众的欢迎。但因在套种条件下,田菁有相当时间处于水淹状态,根据形态观察,田菁水淹部分均形成海绵状组织,并开口于水面上,估计具有通气作用,但 Early-rice intercropping Sesbania has the advantages of less floriculture, lower cost, field cultivation and improved soil fertility. Production practice has proved that this is an effective measure to solve the problem of late rice basal fertilizer. In recent years, our province has promoted a considerable area, welcomed by the masses. However, under the conditions of intercropping, Sesbania has a considerable time in the state of flooding. According to the morphological observation, some parts of the floras of Sesbania form sponge-like tissues and are open to the surface of the water, which is estimated to have aeration effect. However,