布迪椰子、沼地棕和油棕的耐寒性研究  

Cold tolerance of Butia capitata,Acoelorrhaphe wrightii and Elaeis guineensis

作　　者：阮志平[1] 向平[1] 李振基[1] 

机构地区：[1]厦门大学生命科学学院

出　　处：《北京林业大学学报》2008年第4期77-81,共5页Journal of Beijing Forestry University

基　　金：教育部博士教育基金项目

摘　　要：利用寒害指数、电解质渗透率与半致死温度研究了布迪椰子、沼地棕和油棕3种棕榈植物在厦门露地栽种的耐寒性。结果表明,它们的寒害指数差异明显,布迪椰子为7.29,在露地能顺利越冬;沼地棕为20.24,适当保护才能越冬;油棕的寒害指数为75.00,不能在露地越冬。低温锻炼前(10月份)和低温锻炼后(次年1月份)所采的叶片在不同低温处理时的电解质渗透率变化趋势不同,应用Logistic方程分别求出各自的半致死温度(LT50),布迪椰子、沼地棕和油棕在低温锻炼前的半致死温度分别为-7.93、-5.03和-2.19℃,在低温锻炼后的半致死温度分别为-19.10、-6.60和-2.94℃。结果发现,布迪椰子的耐寒力最强而且对降温反应速度最快,沼地棕居中,油棕耐寒力最弱,对温度反应最慢。Cold tolerances of Butia capitata, Acoelorrhaphe wrightii and Elaeis guineensis were studied during the winter （October of 2005 to January of 2006） in Xiamen City by cold injury index, electrolyte leakage and semilethal low temperature. The results show that the cold injury indices （CI） of B. capitata, A. wrightii and E. guineensis were 7.29,20.24 and 75.00, respectively. The electrolyte leakage of leaves was measured in October and January under different temperatures, and the semi-lethal low temperature （ LT50 ） of leaves was assayed in different sampling periods by Logistic equation. The LT50 of B. capitata, A. wrightii and E. guineensis were - 7.93, - 5.03 and - 2.19℃ in October, and were - 19.10, - 6.60 and - 2.94℃ in January, respectively. The results indicate that the sequence of the cold tolerance is as follows ： B. capitata 〉 A. wrightii 〉 E. guineensis.

关 键 词：棕榈植物 电解质渗透率 半致死温度 耐寒性 

分 类 号：S718.3[农业科学—林学]