Article Figures & Data
Figures
- Figure 1.
Hydroexcavation of tree roots with a high-pressure water and vacuum system
- Figure 2.
Root development of Populus euamericana cv. Giacometti trees grown in aerated solution culture with (left) and without (right) treeshelters
Tables
- Table 1.
Mean height 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 Height increase (cm) 3 months 6 months 1 year 2 years - + - + - + - + Fraxinus latifolia 27 b 44 a ---- ---- 162 a 197 a 238 a 233 a Ginkgo biloba 0 a 0.3 a 1.5 a 4.4 a 13 a 18 a 34 a 51 a Lagerstroemia indica 27 b 76 a 30 b 76 a 30 b 137 a 98 b 160 a Platanus racemosa 38 b 64 a ---- ---- 134 a 173 a 330 a 308 a Quercus agrifolia 16 b 51 a 27 b 78 a 57 b 144 a 172 a 191 a Quercus lobata 9 b 31 a 19b 53 a 71 b 200 a 233 a 261 a Sequoia sempervirens 11 b 25 a 12 b 38 a 85 a 68 a 123 b 213 a 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.
- Table 2.
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.
- Table 3.
Top dry mass of seven tree species over time growing with (+) and without (-) treeshelters. Dry mass data for 3 months was lost due to a fire in the drying oven, (n=8 for 3- and 6-month data, n=20 for 1 -year data, n=10 for 2-year data)
Species Top Dry Mass (g) 6 months 1 year 2 years - + - + - + Fraxinus latifolia --- --- 542 a 463 a 3286 a 2265 b Ginkgo biloba 3.7 a 3.3 a 11.4 a 6.8 a 23.2 a 17.0 a Lagerstroemia indica 11.7 b 24.3 a 120 a 177 a 625 a 638 a Platanus racemosa --- --- 1518a 720 b 9357 a 3280 b Quercus agrifolia 22.6 b 48.2 a 113a 143 a 677 a 533 b Quercus lobata 7.0 b 12.0a 162 a 96 a 1346 a 925 b Sequoia sempervirens 16.5 b 31.3 a 386 a 102 b 1125 a 1288 a 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.
- Table 4.
Root dry mass over time and final root-shoot ratios of seven tree species growing with (+) and without (–) treeshelters. Some roots <1 cm in diameter remained in the soil after root system excavation, (n=8 for 3- and 6-month data, n=20 for 1-year data, n=10 for 2-year data)
Species Root Dry Mass (g) 3 months 1 year 2 years Root:Shoot (dry mass basis) - + - + - + - + Fraxinus iatifoiia 46.3 a 17.8 b 259 a 147 b 1473 a 1051 b 0.45 a 0.46 a Ginkgo biloba 5.3 a 4.0 b 6a 4 a 34 a 18 b 1.47 a 1.06 b Lagerstroemia indica 13.3a 11.3a 39 a 28 b 1574 a 180 b 2.52 a 0.28 b Platanus racemosa 40.7 a 27.3 b 673 a 287 b 2394 a 1561 b 0.26 a 0.38 a Quercus agrifolia 12.2 a 8.4 a 43 a 40 a 165 a 135 a 0.24 a 0.25 a Quercus lobata 12.5 a 13.8 a 91 a 66 b 664 a 316 b 0.49 a 0.34 b Sequoia sempervirens 7.3 a 4.0 a 64 a 15 b 404 a 37 b 0.36 a 0.03 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.
- Table 5.
Total root length and total root area of trees growing with (+) and without (-) treeshelters after two years. Some roots < cm in diameter remained in the soil after root system excavation, (n=8 for 3- and 6-month data, n=20 for 1 -year data, n=10 for 2-year data)
Species Total Root Length (cm) Total Root Area (cm2) - + - + Fraxinus Iatifolia 1541 a 1099 b 1831 a 1034 b Ginkgo biloba 273 a 166 b 138 a 52b Lagerstroemia indica 778 a 636 b 443 a 268 b Platanus racemosa 2460 a 1713 b 2915 a 1809 b Quercus agrifolia 485 a 581 a 271 a 276 a Quercus lobata 730 a 605 b 555 a 353 b Sequoia sempervirens 692 a 539 b 117a 195 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.
- Table 6.
Dry biomass response of Populus euamericana cv. Giacometti plants growing in aerated solution culture with (+) and without (-) treeshelters.
Dry Mass (g) Leaf Stem Root Total Root:Shoot (dry mass basis) - + - + - + - + - + 37.6 a 2.8 b 15.7 a 3.3 b 11.5 a 1.5 b 64.8 a 7.6 b 0.73 a 0.45 b Values followed by the same letter for each response group are not significantly different from one another at p=0.05 using Scheffe’s multiple separation procedure.
In this issue
Jump to section
Related Articles
Cited By...
- No citing articles found.