不同处理方法对海南红豆种子萌发及幼苗生长的影响  

Effects of Different Treatments on Seed Germination and Seedling Growth of Ormosia pinnata from Hainan

作　　者：曹小林 郝清玉[1] CAO Xiaolin;HAO Qingyu(Ministry of Education Key Laboratory for Ecology of Tropical Islands,Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province,College of Life Sciences,Hainan Normal University,Haikou 571158,China)

机构地区：[1]热带岛屿生态学教育部重点实验室,海南省热带动植物生态学重点实验室,海南师范大学生命科学学院,海口571158

出　　处：《种子》2021年第8期95-99,105,共6页Seed

基　　金：国家自然科学基金项目(31760202)。

摘　　要：为提高海南红豆种子的发芽率及探究其天然更新困难的原因,对海南红豆种子萌发及幼苗生长的影响因素进行研究。种子萌发采用水分(A)、光照(B)、基质(C)和种皮(D)4因素2水平3重复的正交设计试验方法,播种种子共计48盆。结果表明,种子发芽率较高,不同处理组合的平均萌发率为91.67%,但开始萌发及萌发持续的时间均较长;种皮处理(D)对种子发芽率、发芽速度、发芽势和发芽指数均有显著影响;光照(B)和基质(C)对幼苗株高有显著影响;种子发芽率、发芽速度和发芽指数均最佳的试验组合为A_(2)B_(2)C_(1)D_(1);有利于幼苗株高生长的最佳组合为A_(2)B_(2)C_(2)D_(1)。研究表明,海南红豆种子质量良好,种皮虽然对萌发具有一定的抑制作用,但并不是限制天然更新的直接障碍因子,种子萌发的生理特性及萌发生态条件可能是制约天然更新的主要限制因子。To improve the seed germination rate of Ormosia pinnata from Hainan and explore the reasons of difficult natural regeneration,the factors influenced seed germination and seedling growth of O.pinnata seeds were studied.The O.pinnata seeds were sown in 48 pots by orthogonal design experiment based on four factors and two levels with three repetitions.These factors included water(A),light(B),substrate(C)and seed coat(D).The results showed that the seed germination rate was higher,the average germination rate of different combinations was 91.67%,and the initial time and sustaining time of germination was longer.Seed coat treatment(D)had significant effects on seed germination rate,germination rate,germination potential and germination index,while light(B)and substrate(C)had significant effects on seedling height.In addition,the best combinations of seed germination rate,germination rate and germination index were A_(2)B_(2)C_(1)D_(1).The best combination for seedling height growth was A_(2)B_(2)C_(2)D_(1).The results showed that the quality of O.pinnata seeds was good.Although the seed coat had a certain inhibitory effect on germination,it was not the direct obstacle factor restricting natural regeneration.Physiological characteristics and ecological conditions of seed germination might be the main limiting factors of natural regeneration.

关 键 词：海南红豆 种子萌发 幼苗生长 影响因素 海南岛 

分 类 号：S792.99[农业科学—林木遗传育种]