‘甜橘柚’靠接换砧复壮技术研究

Experiment on Rejuvenation by Inarch Grafting of Citrus reticulate ‘unshiu’×hassaku on Poncirus trifoliata

摘要: 以浙江省庆元县衰退‘甜橘柚’ Citrus reticulate ‘unshiu’×hassaku果树为接穗， 1年生枳 Poncirus trifoliata为砧木，分别在 2016年 2-4月，采用不同方式进行靠接。结果表明，靠接换砧成功后，与对照相比，靠接对‘甜橘柚’干周、冠幅的影响有显著差异（ P﹤0.05），对树高影响差异不显著；斜腹靠接和逢节靠接效果均优于周边靠接，其愈合成活率差异显著（P﹤0.05）；3月靠接效果优于 2月和 4月靠接，其愈合成活率差异显著（P﹤0.05），其中 3月斜腹靠接愈合成活率达 95.83%，且具有操作性强，易掌握，不受树节限制的优点。综上，‘甜橘柚’靠接换砧复壮宜选择在每年 3月份，用斜腹靠接的方式，其愈合成活率最好。

Abstract: Experiment was conducted on rejuvenation of depression Citrus reticulate ‘unshiu’ × hassaku plantation by different inarch grafting with C.reticulate ‘unshiu’ × hassaku as scions and Poncirus trifoliata as rootstock during February and April in Qingyuan, Zhejiang province.The results showed that inarch grafting had evident effect on stock diameter and crown growth, but no significant effect on height growth compared with the control (ungrafting).Different inarch grafting had significant effect on survival rate.The inarching implemented in March had better survival rate than that in February and April, with the top of 95.83%.