Arboriculture & Urban Forestry 47(4): July 2021 Further, the differences in tree growth between the cities were analyzed for each species (Figure 5). While especially the tree-height development of T. cordata was very similar in all cities, higher differ- ences were found for R. pseudoacacia, P. × hispanica, and A. hippocastanum. All in all, the differences 157 between the cities were smaller for the crown diame- ter development than for tree height. Similar figures about tree development of CPA and crown volume over DBH and for tree height, crown diameter, CPA, and crown volume over age for each city and species can be found in the appendix (Figures S1 and S2). Table 3. Allometric relationships with intercept (a), slope (b), standard error (SE), residual standard error (RSE), R², F-value, and P-value for A. hippocastanum, P. × hispanica, R. pseudoacacia, and T. cordata in South Germany to estimate tree height (TH), crown projection area (CPA), crown diameter (CD), crown length (CL), crown volume (CV), and leaf area index (LAI) over diameter at breast height (DBH) x A. hippocastanum DBH y TH CPA CD CL CV LAI P. × hispanica DBH TH CPA CD CL CV LAI R. pseudoacacia DBH TH CPA CD CL CV LAI T. cordata DBH TH CPA CD CL CV LAI a 0.50551 −0.477 −0.11772 −0.24645 −0.72345 0.537219 0.79063 −0.8246 −0.29154 −0.005759 −0.8304 1.00785 0.99291 −0.16352 0.03596 0.26121 0.09767 −1.088 0.59171 −1.0811 −0.43202 −0.19833 −1.28042 0.1269 SE 0.05 0.10 0.05 0.07 0.14 0.03 0.04 0.11 0.06 0.06 0.14 0.05 0.08 0.13 0.07 0.09 0.17 0.09 0.05 0.09 0.04 0.06 0.13 0.04 b 0.55557 1.23016 0.61508 0.68303 1.91319 0.076459 0.55053 1.5046 0.7523 0.695841 2.20044 −0.09901 0.45798 1.18144 0.59191 0.57188 1.75283 0.42704 0.56854 1.44802 0.72758 0.70549 2.15384 0.2281 SE 0.01 0.03 0.01 0.02 0.04 0.01 0.01 0.03 0.02 0.02 0.04 0.02 0.02 0.04 0.02 0.02 0.05 0.03 0.01 0.03 0.01 0.02 0.04 0.01 RSE 0.18 0.34 0.17 0.24 0.49 0.10 0.14 0.37 0.19 0.20 0.49 0.18 0.23 0.40 0.20 0.25 0.52 0.27 0.18 0.32 0.16 0.24 0.48 0.14 R² 0.72 0.79 0.79 0.70 0.82 0.15 0.82 0.84 0.84 0.78 0.87 0.09 0.52 0.71 0.71 0.58 0.76 0.41 0.75 0.86 0.86 0.73 0.86 0.43 F 1,541 2,203 2,203 1,391 2,594 104 2,047 2,296 2,296 1,625 2,945 42 451 1,005 1,012 572 1,314 285 1,670 3,286 3,294 1,478 3,289 412 P < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 < 0.001 ©2021 International Society of Arboriculture
July 2021
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