设计基肥、分蘖肥、促花肥、保花肥、粒肥等 7个施氮期处理 ,研究其对“扬稻 6号”谷壳生长、谷粒充实及粒重的影响。结果表明 :与不施肥相比 ,施用基肥有利于扬稻 6号谷壳增大 ;施用粒肥有利于谷粒充实 ;施用分蘖肥既可促进谷壳增大 ,又可促进谷粒充实 ,从而使粒重显著增加 ;施用促花肥、保花肥或在基肥的基础上过多施用穗粒肥 ,虽可增加籽粒的充实度 ,但使谷壳明显变短变窄 ,粒重比对照显著降低 ;粒重与谷壳的长度、宽度和投影面积均呈极显著正相关 ,相关系数依次为 0 9396 、0 94 86 和 0 9894 ;粒重高低主要取决于谷壳的大小 Seven basal fertilizer treatments such as basal fertilizer, tillering fertilizer, flower-promoting fertilizer, flower-preserving fertilizer and grain fertilizer were applied to study the effects of nitrogen fertilizer on the growth, grain enrichment and grain weight of chamaejasme maize in “Yangdao 6”. The results showed that compared with no fertilization, the application of basal fertilizer was beneficial to the increase of graininess of Yangdao 6; the application of grain fertilizer was conducive to the enrichment of grain; the application of tillering fertilizer could not only increase the growth of grain but also promote the grain filling, Grain weight increased significantly; the application of fertilizer to promote flower, flower fertilizer or fertilizer on the basis of excessive excessive grain ear fertilizer, although can increase the degree of grain filling, but make the chaff significantly shorter and narrower, the grain weight was significantly lower than the control; grain weight There was a significant positive correlation between the length and width of the chaff and the projected area of ​​the chaff. The correlation coefficients were 0 9396, 0 94 86 and 0 9894, respectively. The grain weight was mainly determined by the size of the chaff