以辽宁省不同年代直立穗型代表品种为材料,比较研究了直立穗型粳稻齐穗期株型相关性状的表现及差异。结果表明,直立穗型粳稻存在多种穗型类型;品种间水稻茎叶绿叶数、叶长配置不同,叶宽变异较大,造成绿叶叶面积差异;植株叶片挺立,剑叶、倒2叶叶基角小于14°,从倒3叶开始下部茎叶叶基角、披垂度变大;少分蘖品种下部茎叶披垂度相对较大,叶片叶绿素含量高,株间透光率高,因此具备较好的干物质基础。 Taking the representative cultivars of erect panicle from different age in Liaoning Province as materials, the performance and differences of plant type related traits in erect panicle type japonica at full heading stage were comparatively studied. The results showed that there were many types of panicle type in erect panicle japonica rice. The variety of leaf number, leaf length and leaf width of rice varied greatly among cultivars, resulting in the difference of green leaf area. The base angle was less than 14 °, and the leaf base angle at the lower stem began to increase from the third leaf to the third, and the sagging degree of the lower part of the less tiller varieties was relatively larger with higher leaf chlorophyll content and higher light transmittance. Have a good dry matter basis.