水稻茎秆的结构及其性能的相关性  

The Relationship Between the Structure and the Property of Rice Stem

作　　者：段传人[1] 王伯初[1] 王凭青[1] 

机构地区：[1]重庆大学生物工程学院生物力学与组织工程教育部重点实验室,重庆400044

出　　处：《重庆大学学报（自然科学版）》2003年第11期38-40,共3页Journal of Chongqing University

基　　金：国家自然科学基金资助项目(39770206)

摘　　要：水稻茎秆是典型的生物复合材料,有着优良的力学性能,起到支撑和抗倒伏的作用。通过比较高、中、矮秆和杂交稻典型水稻品种茎秆的细观结构,测定水稻茎秆的拉伸强度极限和弹性模量,分析其细观结构和力学性能的关系。结果表明:中秆类型水稻茎秆的结构更为合理,拉伸强度极限和弹性模量在4个供试品种中是最高的,其大、小维管束数目最多,茎粗、茎壁厚中等,抗倒伏能力最强。因此在高产抗倒伏品种的选育中应向矮中求高,向中秆、硬秆的方向来选育。Rice stem is a perfect kind of composite material with excellent mechanical property such as supporting and lodging resistance. We compare the minute structures of several different kinds of rice stem and analyze the relationship between its minute structure and mechanical property. Though the stem diameter is not the biggest, the specific value of its stem diameter and its wall thickness is relatively smaller which means more rational structure. And its lodging resistance is much more higher. Thus when selecting the highyield and lodging resistance species, we should consider the middle and rigid stalk.

关 键 词：水稻茎秆 拉伸强度极限 拉伸弹性模量 抗倒伏 

分 类 号：Q947[生物学—植物学]