Article Figures & Data
Figures
- Figure 1.
A bark graft patch, attached to the trunk of an Ulmus procera growing in Burnley Gardens, Australia (approximately 240 mm in diameter), 10 years prior to the photograph. Note the uniform ring of callus forming at the branch bark ridge.
- Figure 2.
Examples of bark patch grafts on seedlings of Banksia integrifolia, Platanus × acerifolia, and Eucalyptus viminalis.
- Figure 3.
Success of patch grafts for six species of trees at four different orientations for four seasons: 0 degrees (♦─♦), 90 degrees (■─■), 180 degrees (▲─▲), and 270 degrees (●─●).
- Figure 4.
Success of patch grafts for Platanus × acerifolia, Banksia integrifolia, Quercus robur, and Eucalyptus viminalis at different orientations across all seasons: 0 degrees (♦─♦), 90 degrees (■─■), 180 degrees (▲─▲), and 270 degrees (●─●).
Tables
Species Nursery of origin Seedling size at purchase 1st bark patch season Container size Quercus robur Corella Nursery; Kallista, Victoria 30 cm, bare-rooted Year 1
mid-winter (July)300 mm squat pot Platanus × acerifolia Corella Nursery; Kallista, Victoria 20 cm bare-rooted Year 1
mid-winter (July)200 mm pot Pinus radiata Amcor Cowwarr Weir Nursery; Cowwarr, Victoria 15–20cm field-grown Year 1
mid-autumn (April)200 mm pot Eucalyptus viminalis Acacia dealbata NRCL Nursery; Springvale, Victoria 20–30cm forestry tube Year 1
mid-winter (July)200 mm pot Banksia integrifolia NRCL Nursery; Springvale, Victoria <20 cm forestry tube Year 1
mid-autumn (April)200 mm pot - Table 2.
Month for the commencement of each season’s patch bark grafting trial (n=10 for each treatment).
Species Plug graft #1 Plug graft #2 Plug graft #3 Plug graft #4 Quercus robur Year 1 Year 1 Year 1 Year 2 Acacia dealbata
Eucalyptus viminalis
Platanus × acerifoliamid-winter
(July)mid-spring
(October)mid-summer
(February)mid-autumn
(April)Pinus radiata
Banksia integrifoliaYear 1
mid-autumn
(April)Year 1
mid-winter
(July)Year 1
mid-spring
(October)Year 1
mid-summer
(February) - Table 3.
Success (%) of bark plug re-attachment in six tree species, 2, 4, 8, 16, 32, and 64 weeks after treatment after orientating the plugs at 0, 90, 180, and 270 degrees to their original position (n = 10 for each treatment).
Weeks Pinus radiata Banksia integrifolia Platanus × acerifolia 0 90 180 270 degrees 0 90 180 270 degrees 0 90 180 270 degrees 2 15 0 0 0 77.5 40 65 52.5 21.6 0 23.5 25 4 15 0 0 0 72.5 32.5 47.5 27.5 21.6 0 23.5 20 8, 16, 32, 64 0 0 0 0 72.5 32.5 47.5 27.5 21.6 0 23.5 20 Quercus robur Acacia dealbata Eucalyptus viminalis 0 90 180 270 degrees 0 90 180 270 degrees 0 90 180 270 degrees 2 38.5 20 22.2 35.1 50 25 35 32.5 75 25 80 30 4 38.5 20 19.4 21.6 37.5 15 17.5 32.5 50 2.5 35 5 8 38.5 0 16.7 2.7 37.5 15 12.5 15 50 2.5 20 5 16, 32, 64 18 0 8.3 2.7 37.5 15 12.5 5 50 2.5 20 5 - Table 4.
Success (%) of bark plug re-attachment, 2, 4, 8, 16, 32, and 64 weeks after treatment after orientating the plugs at 0, 90, 180, and 270 degrees to their original position in winter, spring, summer, and autumn (n = 10 for each treatment).
Weeks Winter Spring 0 90 180 270 degrees 0 90 180 270 degrees 2 36.67 13.33 30 20 70 45 50 55 4 33.33 8.33 18.33 15 56.67 28.33 33.33 40 8 33.33 8.33 15 15 48.33 15 25 16.67 16, 32, 64 33.33 8.33 15 15 35 15 20 16.67 Summer Autumn 0 90 180 270 degrees 0 90 180 270 degrees 2 48.33 1.67 38.33 20 13.33 28.3 33.33 13.33 4 33.33 1.67 18.33 15 8.33 20 8.33 8.33 8 33.33 1.67 18.33 15 8.33 16.67 8.33 8.33 16, 32, 64 33.33 1.67 16.67 15 1.67 16.67 1.67 1.67 - Table 5.
Success (%) of bark plug re-attachment in six tree species 2, 4, 8, 16, 32, and 64 weeks after treatment after orientating in winter, spring, summer, and autumn (n = 10 for each treatment).
Weeks Pinus radiata Banksia integrifolia Platanus × acerifolia Win Spr Sum Aut Win Spr Sum Aut Win Spr Sum Aut 2 0 15.0 0 0 52.5 87.5 10.0 85.0 0 2.50 62.5 0 4 0 15.0 0 0 45.0 87.5 7.5 40.0 0 2.50 57.5 0 8, 16, 32, 64 0 0 0 0 45.0 87.5 7.5 40.0 0 2.50 57.5 0 Quercus robur Acacia dealbata Eucalyptus viminalis Win Spr Sum Aut Win Spr Sum Aut Win Spr Sum Aut 2 10.0 70.0 10.0 20 10.0 62.5 27.5 42.5 57.5 90.0 52.5 10.0 4 10.0 67.5 10.0 7.5 10.0 27.5 22.5 42.5 35.0 40.0 7.5 10.0 8 10.0 27.5 10.0 7.5 10.0 10.0 22.5 37.5 30.0 30.0 7.5 10.0 16, 32, 64 10.0 0 10.0 7.5 10.0 10.0 22.5 17.5 30.0 30.0 5.0 10.0 - Table 6.
Logarithmic regression analysis of patch graft success at 2 and 32 weeks for all species, orientations, and seasons using the logarithmic likelihood of the model fitted (n = 10 for each treatment).
Logarithmic likelihood values for logarithmic regression analysis Week Winter Spring Summer Autumn 2 32 2 32 2 32 2 32 Full model −56.97 −57.97 −79.52 −43.77 −44.16 −45.32 −53.71 −39.12 Orientation + species −63.60 −65.52 −90.62 −46.38 −61.81 −50.91 −68.38 −48.03 Species −80.96 −77.97 −97.94 −57.11 −100.31 −75.94 −76.26 −68.62 Patch −114.34 −93.95 −157.49 −118.11 −111.75 −89.88 −131.64 −72.32 P-values derived from logarithmic regression analysis Winter Spring Summer Autumn Week 2 32 2 32 2 32 2 32 Parameter df Interaction 15 0.582 0.419 0.102 0.990 0.002 0.739 0.015 0.272 Orientation/species 3 0.001 0.001 0.002 0.001 0.001 0.001 0.001 0.001 Species/orientation 5 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 Species 5 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 Orientation 3 0.001 0.001 0.053 0.056 0.001 0.001 0.034 0.001
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