【摘要】 选用我国近年育成的超高产水稻品种为材料 ,研究水稻茎秆性状与抗倒性的关系。结果表明 ,茎秆较粗可孕育较大穗子 ;茎秆贮藏物质对籽粒发育有积极作用 ;茎秆的抗折力强弱与茎秆贮藏的干物质量和秆壁厚度呈显著正相关 ;倒伏指数与株高、弯曲力矩呈显著正相关 ,与秆壁厚度和抗折力呈显著负相关 ,而与节间粗度关系不密切。说明 ,培育粗秆有利于孕育大穗 ,但要增强抗倒伏能力 ,关键在于适当控制株高、培育秆壁厚实的品种、增加茎秆的干物质积累量、促进茎秆机械组织的发育和充实更多还原

【Abstract】 Super high\|yielding rice cultivars which were newly bred in China was used to study the relationship between culm traits and lodging resistance . The results indicated that thicker culms were associated with larger panicles; dry matter stored in stem and sheath played an active role in seed development. The breaking\|resistant strength of culm was positively correlated with the amount of dry matter stored in stem and thickness of culm. Lodging index was positively correlated with plant height and bending moment, negatively correlated with thickness of culm and breaking\|resistant strength; however, there was no relationship between lodging index and internode cross\|sectional thickness. The results showed that thicker culms was benefit to larger panicles, so it is important to control plant height properly, breed cultivar of thicker culm, increase dry matter of stem and improve the development of mechanical tissue to strengthen lodging ability.更多还原