【摘要】 为研究不同水稻品种的耐冷程度,减少产量损失,以水稻品种空育131、垦稻12、松粳9号和龙粳11为材料,采用盆栽种植方式于孕穗期进行恒温15℃和变温15℃低温处理,研究孕穗期低温胁迫对水稻空壳率的影响以及不同品种水稻对低温的敏感性。结果表明:随着低温时间延长,水稻空壳率显著增加,且同一品种恒温15℃较变温15℃的空壳率高;4个水稻品种在孕穗期的耐冷性总体表现为空育131>松粳9号>垦稻12>龙粳11,其中龙粳11在孕穗期基本不具备耐冷性。更多还原

【Abstract】 In order to study cold tolerance of different rice cultivars and reduce production loss,taking Kongyu131,Kendao 12,Songjing 9and Longjing 11 as test materials,the low temperature stress with constant and variable 15℃ were carried on at booting stage.The effect of low temperature on percentage of unfilled grains of rice and the susceptibility to chilling injury were studied.The results showed that compared with CK,the percentage of unfilled grains of rice increased significantly with the prolonged time of low temperature,and low temperature stress of constant 15℃ was higher than low temperature stress of variable 15℃.The resistance to low temperature at booting stage were Kongyu 131>Songjing 9>Kendao 12>Longjing 11.更多还原