Abstract: This study examined the effect of irrigation amount on potato growth at the two key stages of tuber formation and tuber growth.The relationship between potato moisture absorption and yield was theoretically verified,and the optimal irrigation system to achieve water saving and high yield was determined.Main results were that during the two key periods of growth potato plant height and stem diameter were positively correlated with the amount of irrigation water applied,and potato yield also increased as the amount of irrigation water increased.When the soil water content reached more than 60% of the soil water holding capacity,the potato yield was significantly increased.In the tuber growth period,the correlation between potato yield and plant height was small,however potato yield was related to stem diameter.

Key words: Potato;Irrigation amount;Yield