在生产和试验中经常见到,凡是长得好的地瓜,都表现为结瓜部位浅,瓜块较集中;反之,结瓜部位相对较深,瓜块分散,蔓叶旺盛。为了摸清结瓜部位与产量的关系及影响结瓜部位的有关因素,自1979年以来,结合大田生产和小区试验进行了考察,根据结瓜部位深浅和瓜块分布程度,将瓜株分作两种类型:凡是单株最大瓜块在瓜拐上的着生位置至地面那段瓜拐的长度和瓜蒂把长度均不超过7厘米者为门瓜株,有一项超过7厘 Often seen in the production and testing, those who grow good sweet potatoes, are manifested as Guazal part of the shallow, more concentrated melon; the other hand, Guazui relatively deep parts, pieces of scattered melon, vine leaves strong. In order to find out the relationship between the fruiting parts and the yield and the related factors that affect the part of the fruiting parts, the author studied the field production and plot test since 1979, and classified them as There are two types: those with the largest single piece of melon in Guagua on the position of students to the ground that Guaigua length and Guadie length of not more than 7 cm for the door melon strains, there is a more than 7%