摘要
为探明香榧Torreya grandis‘Merrillii’微型嫁接最适宜的方法,提高香榧繁殖系数,以榧树实生幼苗和未形成顶芽的香榧嫩梢为研究对象,采用劈接、钻孔接和腹接3种方法,设计接穗留叶2片、4片、6片,接穗保留/摘除顶端等试验,研究不同微型嫁接香榧苗的萌发动态、成活率和生长状况。结果表明:劈接法嫁接的香榧苗,在萌芽动态、嫁接工效与生长状况方面都具有较明显的优势,嫁接15 d后接穗露白,成活率高(89.7%),接穗新梢生长量大;但在粗度增加量、新枝数和新茬数等指标上无显著差异(P>0.05)。接穗留叶数量对嫁接苗的成活率也有影响,以4~6片为宜;短期内接穗保留顶端的嫁接苗更易成活。综合来看,接穗摘除顶端,留叶4~6片,用劈接法嫁接最适宜香榧微型嫁接。
To confirm the best micrografting method and improve the propagation coefficient of Torreya grandis‘ Merrillii＇, seedlings which were not lignified and sprigs with no T. grandis ‘ Merrillii＇ terminal bud were prepared for an experiment to study dynamic germination changes, survival rates, and growth conditions. Different micrografting techniques with scions having 2, 4, and 6 pieces of leaves as well as scions with and without terminal buds were used. The micrografting methods design with treatments of cleft grafting, drill grafting and side grafting and 3 replications. Every treatment was randomly selected 30 seedlings to statistics and analyze.Results showed that cleft grafting of T. grandis ‘Merrillii＇ seedlings had more advantages. The scions germinated after being grafted 15 d, and the grafting survival rate was high（89.7%） which was significant difference under the LSD significance test method with the other two micrografting methods at P =0.05. Also, the cleft grafted seedlings which growth of new shoots was greater, but the coarseness of growth, the number of new branches and stubble, and the number of new crops and leaves showed no significance differences at P=0.05.This study showed that micrografting seedlings of scions without terminal buds were more likely to survive in the short term, but in the long run, cleft grafting with scions removed on terminal buds and with 4 to 6 pieces of leaves was the most suitable for growth of T. grandis ‘Merrillii＇.
出处
《浙江农林大学学报》
CAS
CSCD
北大核心
2018年第1期183-188,共6页
Journal of Zhejiang A&F University
基金
中央财政林业科技推广示范项目(2016TS02)
浙江省科学技术重点研发计划项目(2016C02052-12)
关键词
森林培育学
香榧
微型嫁接
劈接
钻孔接
腹接
silviculture
Torreya grandis ‘Merrillii’
micrografting
cleft grafting
drill grafting
side grafting
