甘薯空株(群众俗称“变公”)是影响甘薯不能稳产高产的原因之一。我县现有的甘薯品种新种花和假芋薯,一般空株率达2～8％,严重的甚至达30～40％。所以找出甘薯发生空株原因,探索克服办法,对提高甘薯产量有一定的意义。甘薯空株因素分析造成甘薯空株的原因是多方面的,概括起来,不外三个因素:(一)种苗因素:主要是品种基因遗传性状和薯苗素质;(二)环境因素:主要是土壤水分温度、土壤理化性状和 Sweet potato empty strains (commonly known as the “public change”) is one of the reasons that affect the sweet potato can not be stable and high yield. The existing sweet potato varieties in our county flower and pseudo potato, the average empty rate of 2 to 8%, even as severe as 30 to 40%. So to find out the reasons for the occurrence of sweet potato, explore ways to overcome, to improve sweet potato production has some significance. Analysis of the causes of sweet potato empty space and sweet potato empty factor analysis is due to many reasons. To sum up, there are only three factors: (I) seedling factors: the genetic characters of the main varieties and the quality of potato seedlings; (II) Environmental factors: Is the soil moisture temperature, soil physical and chemical properties and