矢量法营养诊断结果表明：未施肥的杨树各组织N、P、K均为缺乏状态，N、P、K是杨树生长的限制性因素。
It is showed from vector analysis: N, P and K are deficient in poplar unfertilized and they are limiting factors to poplar.
在水肥异区交替灌水条件下，灌溉水和肥料养分向未灌水区或未施肥区的运动对于这种水肥空间耦合方式较高产量和水分利用率的形成具有重要意义。
In AIFU, movement of water and fertilizer nutrients to the opposite furrow is very important to get a high yield and water use efficiency for this coupling way.
在水肥异区交替灌水条件下，灌溉水和肥料养分向未灌水区或未施肥区的运动对于这种水肥空间耦合方式较高产量和水分利用率的形成具有重要意义。
In AIFU, movement of water and fertilizer nutrients to the opposite furrow is very important to get a high yield and water use efficiency for this coupling way.
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