生产上采用的甘薯繁殖方法通常有二种。一为薯块育苗,一为莖蔓育苗。在晋江专区的惠安、南安、仙遊、莆田、晋江、安溪等县以及泉州市,群众有采用甘薯莖蔓培育过冬苗的习慣。一般認为薯块育苗薯苗质量較好,而莖蔓育苗則繁殖系数較高。为了探討莖蔓育苗在甘薯良种繁育中的作用及其能否引起品种退化現象和防止退化的办法,特据試驗調查材料初步获得的結果整理报导如下。 一 茎蔓育苗的意义和作用 There are usually two types of sweet potato breeding methods used in production. One for potato nursery, one for the stems and nursery. In the Jinjiang area of ​​Huian, Nanan, Xianyou, Putian, Jinjiang, Anxi and Quanzhou, the masses have used sweet potato stems and cranks to cultivate the habit of winter seedlings. Generally considered potato seedling seedling quality is better, while the stem and shoot nursery breeding coefficient is higher. In order to investigate the role of stem-and-shoot nursery in sweet potato breeding and whether it can cause the degradation of varieties and prevent the degradation, the preliminary results obtained from the experimental investigation materials are summarized as follows. The meaning and role of a stem-growing seedlings