UBC Faculty Research and Publications

Site index curve and table for trembling aspen in the boreal white and black spruce zone of British Columbia Klinka, Karel; Chen, Han Y. H.; Chourmouzis, Christine 1997

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Home  Scientia Silvica  Extension Series, Number 2, 1997  Site Index Curve and Table for Trembling Aspen in the Boreal White and Black Spruce Zone of British Columbia  [  + =   +   6 −    − H −  5  where: S =  ]   6 −   −   OQ      (  OQ  − H − ×  )  where: H = top height (m); S = site index (height at 50 year breast-height age); A = breast-height age (year); e = the base of exponential function; and ln = natural logarithm. The height growth curves and site index table derived from the above model presented here are recommended for use across the eastern portion of the BWBS zone for estimating site index of aspen stands aged 15 - 70 years at breast-height.  Reference Chen H.Y., K. Klinka and R. Kabzems. 1998. Height growth and site index models for trembling aspen (Populus tremuloides Michx.) in northern British Columbia. For. Ecol. Manage. 102:157-165       7RS KHLJKW P (m) Top height  Site index curves and tables for estimating site index of trembling aspen in BC have been adopted from the Alberta site index model. However, we found that the Alberta model produces biased estimates of site index of aspen stands in this province. To provide more accurate estimates of site index for BC aspen stands, we sampled naturally established, undamaged, closedcanopy stands over a wide range of sites in the Boreal White and Black Spruce (BWBS) zone. A total of 33 stands were used in the analysis with breast-height ages of dominant trees over 50 years. In each stand, three dominant trees were selected and felled for stem analysis. From these data, we constructed a height growth model:                           Breast-height age (years)  %UHDVWKHLJKW DJH \HDUV  Height growth curve for aspen stands in the Boreal White and Black Spruce zone.  Scientia Silvica is published by the Forest Sciences Department, The University of British Columbia, ISSN 1209-952X Editor: Karel Klinka (klinka@interchange.ubc.ca) Research: Han Y. H. Chen (han.chen@mnr.gov.on.ca) Production and design: Christine Chourmouzis (chourmou@interchange.ubc.ca) Financial support: Forest Renewal British Columbia (1995-1997) For more information contact: Han Chen (han.chen@mnr.gov.on.ca) Copies available from: www.forestry.ubc.ca/klinka, or K.Klinka, Forest Sciences Department, UBC, 3036-2424 Main Mall, Vancouver, BC, V6T 1Z4  Home  Site index table for naturally established aspen stands in the Boreal White and Black Spruce zone. Age @ bh (yrs)  Site index: top height (m) @ breast height age 50 5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  Top height (m) 10 11 12 13 14  2.6 2.7 2.8 2.9 3.0  2.9 3.0 3.1 3.2 3.3  3.2 3.3 3.4 3.6 3.7  3.4 3.6 3.8 3.9 4.1  3.7 3.9 4.1 4.3 4.4  3.9 4.2 4.4 4.6 4.8  4.2 4.4 4.7 4.9 5.1  4.4 4.7 5.0 5.2 5.5  4.7 5.0 5.2 5.5 5.8  4.9 5.2 5.5 5.8 6.1  5.1 5.5 5.8 6.1 6.5  5.4 5.7 6.1 6.4 6.8  5.6 6.0 6.4 6.7 7.1  5.8 6.2 6.6 7.0 7.4  6.0 6.5 6.9 7.3 7.7  6.2 6.7 7.2 7.6 8.0  6.5 6.9 7.4 7.9 8.4  6.7 7.2 7.7 8.2 8.7  6.9 7.4 7.9 8.5 9.0  7.1 7.6 8.2 8.7 9.3  7.3 7.9 8.5 9.0 9.6  15 16 17 18 19  3.0 3.1 3.2 3.3 3.4  3.5 3.6 3.7 3.8 3.9  3.8 4.0 4.1 4.2 4.3  4.2 4.4 4.5 4.7 4.8  4.6 4.8 5.0 5.1 5.3  5.0 5.2 5.4 5.6 5.7  5.3 5.6 5.8 6.0 6.2  5.7 6.0 6.2 6.4 6.7  6.1 6.3 6.6 6.8 7.1  6.4 6.7 7.0 7.3 7.5  6.8 7.1 7.4 7.7 8.0  7.1 7.5 7.8 8.1 8.4  7.5 7.8 8.2 8.5 8.9  7.8 8.2 8.6 8.9 9.3  8.1 8.5 8.9 9.3 9.7  8.5 8.9 9.3 9.7 10.1  8.8 9.3 9.7 10.1 10.6  9.1 9.6 10.1 10.5 11.0  9.5 10.0 10.5 10.9 11.4  9.8 10.3 10.8 11.3 11.8  10.1 10.7 11.2 11.7 12.3  20 21 22 23 24  3.4 3.5 3.6 3.6 3.7  3.9 4.0 4.1 4.2 4.3  4.5 4.6 4.7 4.8 4.9  4.9 5.1 5.2 5.3 5.5  5.4 5.6 5.7 5.9 6.0  5.9 6.1 6.3 6.4 6.6  6.4 6.6 6.8 7.0 7.2  6.9 7.1 7.3 7.5 7.7  7.3 7.6 7.8 8.1 8.3  7.8 8.1 8.3 8.6 8.8  8.3 8.6 8.8 9.1 9.4  8.7 9.0 9.3 9.6 9.9  9.2 9.5 9.8 10.2 10.5  9.6 10.0 10.3 10.7 11.0  10.1 10.5 10.8 11.2 11.6  10.5 10.9 11.3 11.7 12.1  11.0 11.4 11.8 12.2 12.6  11.4 11.9 12.3 12.7 13.2  11.9 12.3 12.8 13.2 13.7  12.3 12.8 13.3 13.8 14.2  12.8 13.3 13.8 14.3 14.7  25 26 27 28 29  3.8 3.8 3.9 4.0 4.0  4.4 4.5 4.5 4.6 4.7  5.0 5.1 5.2 5.3 5.4  5.6 5.7 5.8 5.9 6.1  6.2 6.3 6.5 6.6 6.7  6.8 6.9 7.1 7.2 7.4  7.4 7.5 7.7 7.9 8.1  7.9 8.1 8.3 8.5 8.7  8.5 8.7 9.0 9.2 9.4  9.1 9.3 9.6 9.8 10.0  9.7 9.9 10.2 10.4 10.7  10.2 10.5 10.8 11.1 11.3  10.8 11.1 11.4 11.7 12.0  11.3 11.7 12.0 12.3 12.6  11.9 12.3 12.6 12.9 13.2  12.5 12.8 13.2 13.5 13.9  13.0 13.4 13.8 14.2 14.5  13.6 14.0 14.4 14.8 15.2  14.1 14.5 15.0 15.4 15.8  14.7 15.1 15.6 16.0 16.4  15.2 15.7 16.2 16.6 17.1  30 31 32 33 34  4.1 4.1 4.2 4.2 4.3  4.8 4.9 4.9 5.0 5.1  5.5 5.6 5.7 5.7 5.8  6.2 6.3 6.4 6.5 6.6  6.9 7.0 7.1 7.2 7.4  7.5 7.7 7.8 8.0 8.1  8.2 8.4 8.6 8.7 8.9  8.9 9.1 9.3 9.4 9.6  9.6 9.8 10.0 10.2 10.4  10.2 10.5 10.7 10.9 11.1  10.9 11.2 11.4 11.6 11.9  11.6 11.8 12.1 12.3 12.6  12.2 12.5 12.8 13.1 13.3  12.9 13.2 13.5 13.8 14.1  13.6 13.9 14.2 14.5 14.8  14.2 14.6 14.9 15.2 15.5  14.9 15.2 15.6 15.9 16.3  15.5 15.9 16.3 16.6 17.0  16.2 16.6 17.0 17.4 17.7  16.8 17.3 17.7 18.1 18.5  17.5 17.9 18.4 18.8 19.2  35 36 37 38 39  4.3 4.4 4.4 4.5 4.5  5.1 5.2 5.3 5.3 5.4  5.9 6.0 6.1 6.2 6.2  6.7 6.8 6.9 7.0 7.1  7.5 7.6 7.7 7.8 7.9  8.2 8.4 8.5 8.6 8.8  9.0 9.2 9.3 9.5 9.6  9.8 10.0 10.1 10.3 10.4  10.5 10.7 10.9 11.1 11.3  11.3 11.5 11.7 11.9 12.1  12.1 12.3 12.5 12.7 12.9  12.8 13.1 13.3 13.5 13.8  13.6 13.8 14.1 14.3 14.6  14.3 14.6 14.9 15.2 15.4  15.1 15.4 15.7 16.0 16.2  15.9 16.2 16.5 16.8 17.1  16.6 16.9 17.3 17.6 17.9  17.4 17.7 18.0 18.4 18.7  18.1 18.5 18.8 19.2 19.5  18.9 19.2 19.6 20.0 20.4  19.6 20.0 20.4 20.8 21.2  40 41 42 43 44  4.6 4.6 4.7 4.7 4.8  5.4 5.5 5.6 5.6 5.7  6.3 6.4 6.5 6.5 6.6  7.2 7.3 7.4 7.4 7.5  8.0 8.1 8.2 8.3 8.4  8.9 9.0 9.1 9.2 9.4  9.7 9.9 10.0 10.1 10.3  10.6 10.7 10.9 11.0 11.2  11.4 11.6 11.8 11.9 12.1  12.3 12.5 12.7 12.8 13.0  13.1 13.3 13.5 13.7 13.9  14.0 14.2 14.4 14.6 14.8  14.8 15.1 15.3 15.5 15.7  15.7 15.9 16.2 16.4 16.6  16.5 16.8 17.0 17.3 17.6  17.4 17.6 17.9 18.2 18.5  18.2 18.5 18.8 19.1 19.4  19.0 19.4 19.7 20.0 20.3  19.9 20.2 20.5 20.9 21.2  20.7 21.1 21.4 21.8 22.1  21.5 21.9 22.3 22.6 23.0  45 46 47 48 49  4.8 4.8 4.9 4.9 5.0  5.7 5.8 5.8 5.9 5.9  6.7 6.7 6.8 6.9 6.9  7.6 7.7 7.8 7.8 7.9  8.5 8.6 8.7 8.8 8.9  9.5 9.6 9.7 9.8 9.9  10.4 10.5 10.6 10.8 10.9  11.3 11.5 11.6 11.7 11.9  12.3 12.4 12.6 12.7 12.9  13.2 13.4 13.5 13.7 13.8  14.1 14.3 14.5 14.7 14.8  15.0 15.2 15.4 15.6 15.8  16.0 16.2 16.4 16.6 16.8  16.9 17.1 17.3 17.6 17.8  17.8 18.1 18.3 18.5 18.8  18.7 19.0 19.3 19.5 19.8  19.7 19.9 20.2 20.5 20.7  20.6 20.9 21.2 21.4 21.7  21.5 21.8 22.1 22.4 22.7  22.4 22.7 23.1 23.4 23.7  23.3 23.7 24.0 24.4 24.7  50 51 52 53 54  5.0 5.0 5.1 5.1 5.1  6.0 6.0 6.1 6.1 6.2  7.0 7.1 7.1 7.2 7.2  8.0 8.1 8.1 8.2 8.3  9.0 9.1 9.2 9.3 9.3  10.0 10.1 10.2 10.3 10.4  11.0 11.1 11.2 11.3 11.4  12.0 12.1 12.3 12.4 12.5  13.0 13.1 13.3 13.4 13.6  14.0 14.2 14.3 14.5 14.6  15.0 15.2 15.3 15.5 15.7  16.0 16.2 16.4 16.5 16.7  17.0 17.2 17.4 17.6 17.8  18.0 18.2 18.4 18.6 18.8  19.0 19.2 19.4 19.7 19.9  20.0 20.2 20.5 20.7 20.9  21.0 21.3 21.5 21.8 22.0  22.0 22.3 22.5 22.8 23.1  23.0 23.3 23.6 23.8 24.1  24.0 24.3 24.6 24.9 25.2  25.0 25.3 25.6 25.9 26.2  55 56 57 58 59  5.2 5.2 5.2 5.3 5.3  6.2 6.3 6.3 6.4 6.4  7.3 7.4 7.4 7.5 7.5  8.4 8.4 8.5 8.6 8.6  9.4 9.5 9.6 9.7 9.7  10.5 10.6 10.7 10.8 10.8  11.6 11.7 11.8 11.9 12.0  12.6 12.7 12.8 13.0 13.1  13.7 13.8 13.9 14.1 14.2  14.8 14.9 15.0 15.2 15.3  15.8 16.0 16.1 16.3 16.4  16.9 17.1 17.2 17.4 17.5  18.0 18.1 18.3 18.5 18.7  19.0 19.2 19.4 19.6 19.8  20.1 20.3 20.5 20.7 20.9  21.2 21.4 21.6 21.8 22.0  22.2 22.5 22.7 22.9 23.2  23.3 23.6 23.8 24.0 24.3  24.4 24.6 24.9 25.2 25.4  25.5 25.7 26.0 26.3 26.5  26.5 26.8 27.1 27.4 27.7  60 61 62 63 64  5.3 5.4 5.4 5.4 5.5  6.5 6.5 6.5 6.6 6.6  7.6 7.6 7.7 7.7 7.8  8.7 8.8 8.8 8.9 8.9  9.8 9.9 10.0 10.0 10.1  10.9 11.0 11.1 11.2 11.3  12.1 12.2 12.2 12.3 12.4  13.2 13.3 13.4 13.5 13.6  14.3 14.4 14.5 14.7 14.8  15.4 15.6 15.7 15.8 15.9  16.6 16.7 16.9 17.0 17.1  17.7 17.9 18.0 18.2 18.3  18.8 19.0 19.2 19.3 19.5  20.0 20.1 20.3 20.5 20.7  21.1 21.3 21.5 21.7 21.9  22.2 22.4 22.6 22.8 23.0  23.4 23.6 23.8 24.0 24.2  24.5 24.7 25.0 25.2 25.4  25.7 25.9 26.1 26.4 26.6  26.8 27.0 27.3 27.5 27.8  27.9 28.2 28.5 28.7 29.0  65 66 67 68 69 70  5.5 5.5 5.5 5.6 5.6 5.6  6.7 6.7 6.7 6.8 6.8 6.8  7.8 7.9 7.9 8.0 8.0 8.0  9.0 9.0 9.1 9.2 9.2 9.3  10.2 10.2 10.3 10.4 10.4 10.5  11.3 11.4 11.5 11.6 11.6 11.7  12.5 12.6 12.7 12.8 12.9 12.9  13.7 13.8 13.9 14.0 14.1 14.2  14.9 15.0 15.1 15.2 15.3 15.4  16.1 16.2 16.3 16.4 16.5 16.7  17.3 17.4 17.5 17.6 17.8 17.9  18.5 18.6 18.7 18.9 19.0 19.1  19.6 19.8 19.9 20.1 20.2 20.4  20.8 21.0 21.2 21.3 21.5 21.6  22.0 22.2 22.4 22.6 22.7 22.9  23.2 23.4 23.6 23.8 24.0 24.1  24.4 24.6 24.8 25.0 25.2 25.4  25.6 25.8 26.0 26.2 26.4 26.6  26.8 27.0 27.3 27.5 27.7 27.9  28.0 28.3 28.5 28.7 28.9 29.2  29.2 29.5 29.7 30.0 30.2 30.4  

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