本文通过盆栽研究了沙打旺水肥协同效应.结果表明,肥料的增产效应皆随水分量的提高而增加;在低水分时,肥料增加到一定水平出现负效应,在高水分还末出现负效应;在水肥协同效应中,水分效应大于肥料效应。二年生(三茬)沙打旺水肥协同效应中,土壤营养元素的降低率氮<钾<磷;在低肥时,氮、磷降低率大,钾则小;在高肥时,氮的降低率小. In this paper, the synergistic effects of water and fertilizer were studied by potted plants. The results showed that the yield-increasing effect of fertilizers all increased with the increasing of water content. At low water, the fertilizers increased to a certain level with negative effects, In the water and fertilizer synergistic effect, the water effect is greater than the fertilizer effect. In the synergistic effect of water and fertilizer of two years (three cropping), the reduction rate of nutrient element in soil was nitrogen