[目的]研究叶绿素仪在东北春播玉米营养诊断施肥中的应用.[方法]测定了叶片SPAD值,叶片全氮、全磷和全钾,及玉米相对产量.[结果]玉米SPAD值与玉米叶片全氮含量、施氮肥数量、玉米产量之间存在极显著的线性相关性.[结论]通过测量玉米SPAD来分析玉米氮素营养、预测东北春播玉米产量具有可行性.%[Objective] To research the application of chlorophyll meter in nutrient diagnosis and fertilization of spring maize in northeast China.[Method] We detected the leaf SPAD value,leaf total nitrogen,total phosphorus,total potassium,and maize relative yield.[Result] Maize SPAD had extremely significant linear correlation with leaf total nitrogen content,nitrogen application dosage and maize yield.[Conclusion] It was feasible to forecast the yield of spring maize in northeast China by measuring the SPAD and analyzing the maize nitrogen nutrition.
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