关键词: 农民纯收入, 农民纯收入, 预测, 灰色GM(1, 1)模型, 多元线性计量经济模型

Abstract: In order to scientifically evaluate the meat used old Cucurbita moschata varieties, the authors studied the diversity, correlation and the cluster analysis of major botanical characters of 41 exhibitors varieties, including the traits of flowering, the first section, the length of the fruit lower part, fruit length, stem diameter, internode length, the maximum leaf diameter and longitudinal diameter, fruit weight, flesh thickness, soluble solids content and so on. The results showed that the variations of the length of the fruit lower part, fruit weight, fruit length and flesh thickness were larger, the variation of flowering trait was smaller; there were significant or highly significant correlations between the traits. Cluster analysis showed that 41 old Cucurbita moschata varieties could be divided into 3 groups, multiple traits of the first group was better than that of the other two groups, and higher similarities were found among groups and varieties within each group. This research provided the basis for selecting excellent breeding traits and the parents for hybrids.