摘要
为了揭示江南油杉(Keteleeria fortunei var.cyclolepis)种子萌发对环境的适应性,设置光照、水分、基质等环境条件对江南油杉种子萌发进行胁迫研究。结果表明:光照对江南油杉种子萌发无显著性影响,种子萌发率为81.67%~83.33%,对幼苗生长具有一定影响;在持续黑暗胁迫条件下江南油杉幼苗均为黄化苗;间歇性光照对江南油杉种子萌发和幼苗生长均无显著影响。江南油杉种子在10%水分条件下不能萌发;在25%~30%水分条件下萌发效果最好,萌发率为75.00%左右;当基质中水分小于25%时江南油杉种子不能萌发或萌发效果不好,幼苗生长较差;当基质中水分大于30%时种子萌发和幼苗生长受到抑制。江南油杉种子在滤纸基质条件下萌发效果最好,种子萌发率为83.33%;在细沙基质条件下幼苗生长最好,胚芽长22.42 mm,胚根长53.08 mm。
In order to reveal the adaptability of the seed germination of Keteleeria fortunei var.cyclolepis to the environment,the seed germination of K.fortunei var.cyclolepis was studied by setting illumination,mois?ture and substrate.Results showed that illumination had no significant effect on the germination of K.fortunei var.cyclolepis seeds,and the germination rate was 81.67%~83.33%,which had some influence on growth of seedlings.K.fortunei var.cyclolepis seedlings were etiolated in condition of continuous darkness.Intermittent il?lumination had no significant effect on seed germination and seedling growth.K.fortunei var.cyclolepis seeds could not germinate in 10%moisture condition.Under 25%to 30%moisture conditions,the germination rate was the best,and the seed germination rate was about 75.00%.When the moisture content in matrix was less than 25%,seeds could not germinate or had bad effect on germination and had poor seedling growth;when the mois?ture content in matrix was greater than 30%,the seed germination and seedlinggrowth were inhibited.The germi?nation rate of K.fortunei var.cyclolepis seeds in the paper substrate was best,which was 83.33%;the seedling growthwasfastestinthesandmatrix,anditsplumulelengthwas22.42mmandradiclelengthwas53.08mm.
作者
王鸿彬
刘雄盛
蒋燚
刘菲
黄荣林
WANG Hong-bin;LIU Xiong-sheng;JIANG Yi;LIU Fei;HUANG Rong-lin(Guangxi Forestry Research Institute,Guangxi Key Laboratory of Superior Timer Trees Resource Cultivation,Key Laboratory of Central South Fast-growing Timber Cultivation of Forestry Ministry of China,Nanning 530002,China)
出处
《广西林业科学》
2018年第2期170-174,共5页
Guangxi Forestry Science
基金
广西重点研发计划(桂科AB16380100)
广西第十六批“新世纪十百千人才工程”第二层次人选专项(桂人社函[2015]130号)
广西优良用材林资源培育重点实验室自主课题(16-A-01-01)
广西林科院基本科研业务费专项(林科201621号)
关键词
江南油杉
种子萌发
光照
水分
基质
Keteleeria fortunei var.cyclolepis
seed germination
illumination
moisture
substrate
作者简介
第一作者:王鸿彬(1987—),男,助理工程师,硕士,从事森林培育研究。;通信作者:蒋燚(1968—),男,博士,教授级高级工程师,从事森林培育研究。
