Seed planting of potato seed can promote the exchange of oxygen inside and outside the tuber, break dormancy, early germination and emergence. However, diseases can be easily transmitted through the cutting knife when cutting, causing bad seeds, lack of seedlings or increased incidence in the field, and accelerating the degradation of varieties. The cuttings are too large and the amount of seed is large, generally cut into 20-30 grams is appropriate. Dicing when cutting, so that each cutting has a bud with the top edge. Cut out the diseased potato when cutting, and cut the utensils to be strictly disinfected to prevent transmission of disease. Small whole-potato seeds can avoid diseases caused by cutting knife, and the small whole potatoes have strong vigor and drought resistance, and they emerged early and neatly after sowing. The number of buds in each hole, the number of main stems and the number of tubers increased. Therefore, about 25 grams of robust and small potatoes are used as seeds, which has significant effect on disease prevention and yield increase. However, the sweet potato generally has a short growing period, low maturity, long dormancy, and often premature aging. The cultivation needs to grasp the appropriate density, good germination treatment, increase potassium fertilizer, and with the corresponding nitrogen and phosphorus fertilizers, in order to play the production potential of small potatoes. Germination is an important measure for preventing disease and producing high yields in potato cultivation. Germination before sowing can promote early maturity and increase yield. At the same time, during the germination process, diseased rotten potatoes can be eliminated, and the rate of diseased plants in the field or lack of seedlings after planting can be reduced, which is beneficial to seedlings and seedlings. Germination method: The seed potato and sand are layered and placed in layers, and the thickness is about 3-4 layers. Under the optimum temperature and constant humidity of about 20°C, seed potatoes can germinate after about 10 days. When germination, seed germination with 0.1% -0.2% potassium permanganate solution soaked for 10-15 minutes or 2% thiourea soaking for 20 minutes, can increase the germination effect. Household Cleaner,Grease Cleaner Kitchen,Household Carpet Cleaner,Cleaning Spray Wuxi Keni Daily Cosmetics Co.,Ltd , https://www.kenidailycosmetics.com