应用灰色系统理论中关联度分析法对７个早熟甘薯品种的６个相关因素与鲜薯产量的关联度分析，结果表明甘薯早熟品种鲜薯产量与其相关因素的关联度排列顺序依次为：上薯率ｒ５，藤叶重ｒ３，一次分枝数ｒ２，烘干率ｒ６，最长蔓长ｒ１，结薯数ｒ４。明确了各因素对鲜薯产量影响的主次关系，为选育早熟高产甘薯品种提供了理论依据。 Correlation analysis of six related factors and fresh potato yield in seven precocious sweet potato cultivars was done using the method of correlation analysis in gray system theory. The results showed that the correlation of fresh yield of sweet potato and its related factors was ranked as follows: Rate r5, vine leaf weight r3, a number of branches r2, drying rate r6, the longest vine length r1, tuber number r4. The primary and secondary relationships of the factors affecting the yield of fresh potato were clarified, which provided the theoretical basis for the selection and breeding of sweetpotato variety with early maturity and high yield.