1 .8　施氮时期对小麦子粒蛋白质含量的影响不同时期追施相同氮肥 ,对子粒蛋白质含量的影响也不尽相同。一般情况下 ,随追氮时期的后移 ,子粒蛋白质含量有逐渐提高的趋势。据试验在返青、起身、拔节、孕穗、扬花、灌浆 6个时期分别进行相同数量的施氮处理 ,其子粒蛋白质含量逐 1.8 Effects of nitrogen application on grain protein content of wheat The effects of topdressing the same nitrogen fertilizer on grain protein content in different periods are also different. Under normal circumstances, with the late shift of nitrogen, grain protein content has gradually increased. According to the experiment, the same amount of nitrogen application was applied to the rejuvenation, the rose, the jointing, the booting, the flowering and the grouting respectively. The protein content of the grain