Planting performances of different vine sections of new sweet potato variety “Longjinshu No.1”

The vine of "Longjinshu No.1" were divided into 5 sections from top to base to study their planting performances. The results showed that Section 1 received the highest yield, 2770.0 kg per 667 m², which was very significant than those of others. The lower yield was observed following with the section was closer to the base of the vine. The yield of Section 2, Section 3 and Section 4 were with no significant differences, but extremely significantly higher than that of Section 5. Therefore, in the productive practice, Section 1 of the vine was best for planting, and Section2, 3, 4 could be suitably used, but Section 5 need to be obsoleted. The main factors affecting on yield included tuberization time, tuber amount per plant, and the ratio of big, middle, and small tubers.