摘要
在春季和夏季分别进行杂种鹅掌楸LiriodendronchinenseX×L.tulipifera扦插试验,对不同季节扦插生根所需时间、顶芽的作用、平均生根数及愈伤组织生长状况等特征做了比较研究。结果表明:在不同季节扦插,其生根过程及生物学特性表现不同:春季扦插生根所需时间(60～80d)较夏季长(20～30d);夏季扦插顶芽的作用较春季明显;春插时,"假活"现象严重,而夏插时插条容易出现腐烂现象;春插时,不定根数多数稳定在3～4条,较夏插少,而夏插时不同插条上不定根数变化较大,常达到10条以上;春插时,愈伤组织较夏季产生的少,夏插时,有部分插条只产生愈伤组织而不生根,春插时则很少见。因此,在不同的季节扦插时应采取不同的措施,提高扦插生根率。
Through the cuttage experiments of Liriodendron chinense×L.tulipifera conducted in spring and summer,characteristics such as the time of adventitious root formation,the effect of terminal bud and the state of callus are studied in detail.The results show that the cutting in different seasons have different biological characters of root formation.The time of adventitious rooting formation is longer in spring(60～80 d)than in summer(20～30 d);the effect of termindal bud in summer is stronger than that in spring.When cuttage is conducted in spring,there are serious phenomena of pseudogrowth,the number of adventitious roots is 3～4 and smaller than that in summer;when cuttage is conducted in summer,the cutting are likely to rot.When cuttage is conducted in spring,the number of adventitious roots is 3～4;when cuttage is conducted in summer,the number is over 10.When cuttage is conducted in spring,the cuttings have few calluses;when cuttage is conducted in summer,some cuttings have only calluses but no roots.Therefore,different measures of cuttage shall be taken in different seasons to improve rooting rate.
出处
《浙江林学院学报》
CSCD
北大核心
2003年第3期249-253,共5页
Journal of Zhejiang Forestry College
基金
九五"江苏省农业科技攻关项目(BE96350)
关键词
育苗
杂种鹅掌楸
扦插
生长特性
seedling growing
Liriodendron chinense×L.tulipifera
cuttage
growth characteristics
