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通过对氮肥不同追肥时期及比例对小麦籽粒灌浆特性影响的研究表明 ,不同追肥时期及比例对小麦粒重的影响 ,主要是通过影响平均灌浆速率 ,特别是最大灌浆速率及缓增期灌浆强度来实现的。追肥量的 2 / 3于拔节期 ,1 / 3于孕穗期施用 ,可以提高平均灌浆速率 ,适当延长缓增期持续天数 ,提高缓增期灌浆速率 ,达到提高粒重的目的。
The effects of different top-dressing period and proportion of nitrogen fertilizer on the grain filling characteristics of wheat showed that the effects of different top-dressing dates and proportion on the grain weight of wheat mainly affected the average grain filling rate, especially the maximum grain filling rate and the grain filling intensity Achieve. Applying 2/3 of the topdressing fertilizer at the jointing stage and 1/3 at the booting stage can increase the average filling rate, prolong the duration of the slow growth period and increase the filling rate during the slow growth period, so as to increase the grain weight.