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本文研究了山西省晋中盆地麦收后直播特早熟夏玉米冀承单 3号 ,不同时期追肥对氮、磷、钾三要素吸收与分配的影响。结果表明 ,三要素的吸收数量和平均吸收强度均以大喇叭口期追肥为高 ;追肥时期不影响三要素的吸收趋势 ,氮、磷的吸收趋势均符合Logistic曲线 ,钾的吸收均符合一元三次曲线 ,且吸收强度均出现两个高峰 ,但大口期追肥处理则使氮、磷的第二个吸收高峰推迟出现。成熟期 ,氮多集中于籽粒中 ,钾多分布于秸秆中。特早熟夏玉米每生产百千克籽粒需吸收氮 3 2 6～ 3 33 ,五氧化二磷 1 84～ 2 33 ,氧化钾 5 1 8～ 5 1 9 。
In this paper, we studied the effects of topdressing summer maize Jizheng Dan 3 on the absorption and distribution of nitrogen, phosphorus and potassium in different periods in the Jinzhong basin of Shanxi Province. The results showed that the absorption quantity and the average absorption intensity of the three factors were topdressing in the big bell mouth stage. The top dressing did not affect the absorption tendency of the three elements. The absorption trends of nitrogen and phosphorus were in line with the Logistic curve, Curve, and absorption intensity showed two peaks, but the big mouth of the top dressing treatment nitrogen, phosphorus, the second absorption peak postponed. At maturity, nitrogen is more concentrated in the grain, potassium is more distributed in the straw. Special precocity of summer corn per kilogram of grain to be produced to absorb nitrogen 3 2 6 ~ 3 33, phosphorus pentoxide 1 84 ~ 2 33, potassium 5 1 8 ~ 5 1 9.