At present,many studies which are on the activeness of sweet potatoes at home and abroad,mainly use the earthnuts or the caudexes and tendril as objects,but the studies on sweet potato roots neck are rarely seen although they are the other passel of sweet potato production.

Primary study on brewing technology of wine fermented from sweet potato tips;

This paper focuses on nutritional characteristics,food quality of the stem-apex of sweet potato in different growing period and the effect of farming production in different farming quantity and time and the nutritional content of products and the exploitation of the series of production.

The paper investgates the effect of extracting temperature, extracting time,and material-medium-rade on extraction of polysaccharides from stem of sweet potato with orthogonal design.

Study on sweet potato vine cutting ratio and interval;

The extraction of general flavonoids from sweet potato stem with ethanol was investigated.