Potatoes soaked in water have low calories, and the calories of boiled potatoes per 100g account for about 2% of the total calories recommended by China Nutrition Society for ordinary adults to keep healthy every day. The expansion of potato tubers and the formation of berries are contradictory in nutrient distribution, because the growth of berries and the expansion of tubers are basically carried out at the same time.

The more berries on the plant, the greater the influence on tuber yield, generally reducing 5%- 10% and more than 20%. Therefore, if it is not for harvesting seeds, for those varieties with more fruits, flowers and buds should be picked in time to avoid berries and tubers competing for nutrition. The transpiration coefficient of potatoes is between 400 and 600. If the total rainfall is between 400-500mm and is evenly distributed in the growing season, the water demand of potatoes can be met.