Mean caliper increases of seven tree species over time growing with (+) and without (-) treeshelters, (n=8 for 3- and 6-month data, n=20 for 1-year data, n=10 for 2-year data)
Species | Mean Caliper Increase (mm) | |||||||
---|---|---|---|---|---|---|---|---|
3 months | 6 months | 1 year | 2 years | |||||
- | + | - | + | - | + | - | + | |
Fraxinus iatifoiia | 9 a | 6 b | --- | --- | 32 a | 27 a | 83 a | 61 b |
Ginkgo biloba | 2.0 a | 1.3 b | 2.6 a | 2.2 a | 3.5 a | 3.2 a | 9.1 a | 6.4 a |
Lagerstroemia indica | 4.9 a | 4.3 a | 5.4 a | 5.9 a | 12 a | 10 a | 32 a | 23 a |
Platanus racemosa | 7.0 a | 9.0 a | --- | --- | 57 a | 36 b | 138 a | 82 b |
Quercus agrifolia | 3.4 a | 3.1 a | 4.1 a | 5.0 a | 13 a | 12 a | 31 a | 22 b |
Quercus lobata | 1.8a | 2.4 a | 2.1 a | 2.7 a | 16 a | 12 a | 44 a | 32 a |
Sequoia sempervirens | 3.2 a | 1.6 b | 4.5 a | 5.2 a | 24 a | 12 b | 52 a | 36 b |
Values followed by the same letter for each time period are not significantly different from one another at p=0.05 using Scheffe’s multiple separation procedure.