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在盆栽条件下 ,以粳稻 95 1 6、日本晴为供试材料 ,研究不同施氮时期对粳稻品种籽粒性状的影响及其与粒重的关系 .结果表明 :与不施肥相比 ,施用基肥可促进谷壳伸长增宽 ,谷壳投影面积增加 ;施用促花肥、保花肥或在施用分蘖肥的基础上过多施用穗粒肥 ,虽可增加谷粒的充实度 ,但谷壳长度、宽度和投影面积变小 ,粒重下降 ;施用分蘖肥可促进谷壳增大 ,对谷粒充实度的影响因品种而异 ;谷壳投影面积与粒重关系密切 (r9516 =0 .8990 ,r日本晴 =0 .94 2 8 ) ,谷壳越大 ,籽粒越重 .谷壳投影面积主要由谷壳宽度所决定 .
Under potted condition, the effects of different N application periods on the grain traits and the relationship between the grain weight and the grain weight were studied using japonica rice 95 1 6 and Nipponbare as test materials. The results showed that compared with non-fertilization, the application of basal fertilizer could promote Widening and widening of the chaff, and increasing the projected area of the chaff; applying too much fertilizer of flower and fertilizer or applying fertilizer of excessive fertilizer on the basis of the application of tillering fertilizer can increase the degree of grain filling, but the length, width and projection of the chaff The area and particle weight of panicle decreased. The application of tillering fertilizer could promote the increase of chaff, and the effect on grain filling degree varied with different varieties. The area of chaff was closely related to grain weight (r9516 = 0.8990, r Nipponbare = 0 .94 2 8), the larger the chaff, the heavier the grain. The chaff projected area is mainly determined by the chaff width.