水稻茎秆抗倒伏研究

Lodging Resistance of Stems in Rice(Oryza sativa L.)

[目的]探讨水稻茎秆的性状与抗压强度的关系。[方法]运用石蜡切片技术对10个水稻品种茎秆(包括3个节间)的形态、解剖特征进行系统研究;运用电子万能材料试验机技术测出各品种的抗压强度;对特征数据与茎秆抗压强度进行相关性分析。[结果]相关性分析显示,茎的外径、横切面积与茎秆抗倒伏能力密切相关,可作为茎秆抗倒伏的重要参考因素。品种63两优636的外径和横切面积明显高于其他受测试品种,且3节间都具有较高的抗压强度,产量也高。[结论]63两优636可作为水稻超高产的栽培品种。

[Objective] The paper was to explore the relationship between character of rice stem and compressive strength.[Method] The morphological and anatomical characters of stems of 10 rice varieties（including three internodes） were systematically studied by paraffin sectioning technology;the digital force tester was used to measure the compressive strengths of various varieties;the correlation between above-mentioned characters and stem compressive strengths was analyzed.[Result] Correlation analysis showed that the outer diameter and cross-sectional area of stem had close relation with longing resistance of stem,which could be adopted as the important factors for stem longing resistance.The outer diameter and cross-sectional area of 63 Liangyou 636 was significantly higher than other tested varieties,three internodes all had high compressive strength,and the yield was also high.[Conclusion] 63 Liangyou 636 could be used as the rice cultivar with super yield.