| 水稻结实期茎秆结构的变化动态及其与抗折力矩的关系 |
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| 引用本文： | 程金秋,陈煊,许多,李玉玲.水稻结实期茎秆结构的变化动态及其与抗折力矩的关系[J].耕作与栽培,2014(4):4-6. |
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| 作者姓名： | 程金秋 陈煊 许多 李玉玲 |
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| 作者单位： | 扬州大学江苏省作物遗传生理国家重点实验室培育点/粮食作物现代产业技术协同创新中心,江苏扬州225009 |
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| 基金项目： | 江苏省高等学校大学生实践创新训练计划 |
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| 摘 要： | 以抗倒能力不同的11个水稻品种为材料,研究茎秆结构特征以及其与抗折性的关系.结果表明：结实期各节间穗后30d的抗折力矩最小,越靠近茎秆基部的节间的抗折力矩越大.水稻基部第2节间的茎壁厚度对茎秆抗折性影响较大,增加茎壁厚度能有效防止水稻倒伏;茎壁厚度与外径的比值从齐穗后15d到45d变化幅度较小,相对于齐穗期显著升高.相关分析的结果表明,茎秆壁厚与抗折力呈显著正相关.
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| 关 键 词： | 水稻 结构特征 抗折性 |
Dynamics for Structural Characteristics of Stem and Their Relationships with Fracture Resistance |
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| Authors: | CHENG Jin-qiu CHEN Xuan XU Duo LI Yu-ling |
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| Institution: | (J iangsu Key Laboratory of Crop Genetics and Physiology/Co--Center .for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou , J iangsu 225009, China) |
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| Abstract: | Eleven rice cultivars were studied on the structural characteristics and their relationships with fracture resistance. The results showed that, Lodging resistance moment is the smallest on 30 days after heading. The closer to the basal internode, the more fracture resistant the stem will be. Stem wall thickness greatly affects stem lodging resistance, and enhancing the stem wall thickness of basal internodes can effectively prevent lodging; The ratio of stem wall thickness to outer diameter changes in a small range from 15 days after full heading to 45 days, but is significantly higher than that of heading stage. The correlation analysis indicates that, stem wall thickness is positively correlated with lodging resistance moment. |
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| Keywords: | rice structural characteristics fracture resistance |
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