Abstract:

Shandong province is the main sweetpotato production area in China. How to bring the superiority of sweetpotato into full play and strengthen sweetpotato competitiveness, became the first subject in sweetpotato studied. According to the present situation of sweetpotato product, sixteen different sweetpotato varieties were used for experiment, which varieties were on extension in north. The fresh root yield, drying material rate, dry root yield, dry root starch rate, crude fiber content and related coefficient before them were determined. The results showed: The highest fresh root yield was ‘Nanshu8’, which was 74253.25 kg/hm2. The highest drying material rate was ‘Shangshu025-6’, which was 39.19%. The highest dry root yield was ‘Nanshu8’, which was 25857.6 kg/hm2. The highest dry root starch rate was ‘Shangshu025-6’,which was 73.03%. The lowest crude fiber content was ‘Shangshu025-6’, which was 1.8%. In the same ecological environment, the fresh root yield and dry root yield of edible-type ‘Nanshu8’ were highest. ‘Lushu8’, ‘Qining031’, ‘Beijing553’, ‘Nanshu8’, ‘Taizhong6’ could be used as edible-type and starch industrial-type varieties. Crude fiber content of all varieties was lower. Positive correlation between the fresh root yield and dry root yield was very significant, and positive correlation between the drying material rate and dry root starch rate was significant. The correlation between taste global impression and dry root starch rate was not significant.