CUTTING SIZE AND POSITION AFFECT ROOTING EFFICIENCY OF Camellia impressinervis: A GOLDEN CAMELLIA
DAO TRUNG DUC
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
MAI THI LINH
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
TRAN DUC MANH
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
DANG VAN THUYET
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
LY THI THANH HUYEN
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
NGUYEN VAN TUAN
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
PHUNG DINH TRUNG
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
NGUYEN THI THU PHUONG
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
NINH VIET KHUONG
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
DANG THI HAI HA
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
TRAN CAO NGUYEN
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
TRAN HOANG QUY
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
PHAM DINH SAM
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
VU TIEN LAM
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
NGUYEN HUU THINH
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
HOANG THANH SON
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
TRINH NGOC BON
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
HO TRUNG LUONG
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
TRAN ANH HAI
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
DUONG QUANG TRUNG
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
NGUYEN QUANG HUNG
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
TRAN HONG VAN
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
NGUYEN THI HOAI ANH
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
DINH HAI DANG
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
VU VAN THUAN
Centre for Applied Silviculture Research and Extension, Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
TRAN VAN DO *
Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Hanoi, Vietnam
*Author to whom correspondence should be addressed.
Abstract
Cutting propagation provides uniform plant materials with original characteristics of the mother. The effects of cutting size and position on rooting were studied for Camellia impressinervis, a critically endangered golden camellia widely used for healthcare. Rooting medium was made by 100% soil collected from 0-40 cm depth of forested soil. Rooting pots of 3.5 cm diameter and 7 cm long made of non-woven plastic (bottom open) were used. The pots were set on the seedbed in the nursery with automatic spraying system. Exogenous hormone IBA (Indole-3-butyric acid) 2% by weight in powder type was used. A randomized complete block design was set up with three replications and each replication contained 24 cuttings. The results indicated after six months of growth, two-leaf cuttings (80.0%) had significant higher rooting percentage than one-leaf cuttings (58.3%). Cuttings with a cut base between leaves/internode (58.3%) had significant higher rooting percentage than cuttings with a cut base at phyllode (53.9%). Cuttings with perpendicular base (77.8%) had significant higher rooting percentage than cuttings with 45o angle base (64.0%). The mean root number per cutting and mean root length were high in all treatments, which was > 5.5 roots/cutting and longer than 3.2 cm, respectively. It is concluded that to produce seedlings for C. impressinervis by cutting propagation, two leaves should be retained on a cutting, which was cut at a position between leaves/internode and the cutting base was cut perpendicularly.
Keywords: Cutting base, cutting length, indole-3-butyric acid, phyllode, rooting efficiency.