In order to understand the effects of nutrient management on winter wheat colony and nutrients contents dynamics, a field experiment was conducted in the middle-south Hebei Province. The results showed the optimized (OPT) treatment significantly increased the spikes number than the conventional (CK) treatment by putting off the topdressing N to shooting stage. The percentage of ear tiller significantly increased from 26.9% of CK to 33.0% of OPT. The plant N content and N uptake for OPT treatment were significantly higher than CK treatment at shooting stage and booting stage,respectively. The plant P content for OPT was lower than that of CK in the whole wheat growth period, while the P uptake was higher from booting stage to harvest. The plant K content increased from regreen stage to booting stage and then drop down from booting to harvest stage. The plant N concentration for OPT treatment was sig-nificantly higher than that of CON at shooting stage, which may suggest the plant N concentration at shooting stage was the key factor which influenc-ing the tiller percentage.%在冀中南中低产农田，采用对比试验设计，以农民习惯养分管理为对照（CK），对农田养分管理模式进行了优化调控（OPT，氮素追施时间后移至拔节期），通过田间养分试验，分析了小麦返青至拔节期的群体数量、籽粒产量以及植株氮磷钾养分浓度的变化规律。结果表明：氮素适当后移至拔节期的养分优化管理模式，最终成穗率达到了生育期最高总茎数的33.0%，明显高于农民习惯养分管理的成穗率（26.9%），从而促进了产量的提高。优化处理的植株氮浓度、氮素吸收量分别在拔节期和孕穗期显著高于农民习惯处理；植株磷浓度在全生育期均低于农民习惯处理，但磷吸收量则从孕穗期开始高于农民习惯处理；植株钾浓度在全生育期呈先上升后下降的变化趋势，农民习惯处理的植株钾浓度均显著高于优化处理。总体来看，优化处理在拔节期植株氮素浓度显著高于农民习惯处理，这可能是促进优化处理群体成穗数提高的关键；而磷钾浓度则无明显影响。
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