通过盆栽试验研究了沙打旺水肥协同效应对Ｎ、Ｐ、Ｋ吸收的影响，结果表明：Ｎ地上，整体水分平均主效应和交互效应为肥料效应的２．００，２．５７倍；Ｐ地上几乎相等；Ｋ地上分别是２．４４、２．７０倍。就Ｎ∶Ｐ∶Ｋ的比例而言。地上１．００∶１．３０～１．８３∶８．２０～１３．３７；总体１．００∶１．３４～１．６６∶７．３１～８．８８。虽然水肥都有增加Ｎ、Ｐ、Ｋ吸收的效果，但在高水分时均为抛物线型增加。从增加Ｎ、Ｐ、Ｋ的绝对量来说，水分控制在０～１水平较为适宜 The pot experiment was conducted to study the effects of water and fertilizer synergistic effects on the absorption of N, P and K. The results showed that the average main and interaction effects of water and fertilizer on N were 2.00 and 2.57 folds of the fertilizer effect respectively. Almost equal; K floor were 2.44,2.70 times. In terms of the ratio of N: P: K. On the ground 1.00: 1.30 ~ 1.83: 8.20 ~ 13.37; Overall 1.00: 1.34 ~ 1.66: 7.31 ~ 8.88. Although both water and fertilizer have the effect of increasing absorption of N, P and K, they both increase parabolically at high water content. From increasing the absolute amount of N, P, K, it is more appropriate to control moisture at the level of 0 ~ 1