Crown morphology of Norway spruce from usual tree measurements

Abstract

The crown morphology of Norway spruce (Picea abies Karst) was studied from 617 sample trees. In order to model branch and crown descriptors the linear and nonlinear regression methods were extensively used. Results show that the branch length can be fairly well predicted from the distance to the apex of the tree and that the branch spread has a high correlation with the branch length and the insertion angle. Models have been set up to predict the crown ratio, height to the base of the living crown, height to the first living branch and the height to the first dead branch from the usual whole-tree measurements, namely diameter at breast height total height and total age.

Keywords

Crown morphology / Branchiness / Crown ratio / Norway spruce / Picea abies Karst / Modeling / Wood quality

References

[1] Baxter S.M., Cannell M.G.R. Branch development on leaders of Picea sitchensis Can. J. For. Res., 1979, 8: 121-128.

[2] Beadle C.L., Tablot H., Jarvis P.G. Canopy structure and leaf area index in a mature Scots pine forest Forestry, 1982, 55: 105-123.

[3] Bouchon J. Importance des plantations de Douglas et Epic a en France Revue Forestiere Fran aise, 1984, 26: 254-258.

[4] Colin F., Houllier F. Branchiness of Norway spruce in north=eastern France: modeling vertical trends in maximum nodal branch size Ann. Sci. For., 1991, 6: 679-693.

[5] Colin, F. & Houllier, F. 1992. Branchiness of Norway spruce in north-eastern France: predicting the main crown characteristics from usual tree measurement. Soumis aux Ann. Sci. For.

[6] Curtis R.O., Reukema D.L. Crown development and site estimates in a Douglas-fir plantation spacing test Forest Science, 1970, 16(3): 287-301.

[7] Dyer M.E., Burkhardt H.E. Compatible ratio and crown height models Can. J. For. Res., 1987, 17: 572-574.

[8] Hashimoto R. Analysis of the morphology and structure of crowns in a young sugi (Cryptomeria japonica) stand Tree physiology, 1990, 6: 119-134.

[9] Hashimoto R. Canopy development in young sugi (Cryptomeria japonica) stands in relation to changes with age in crown morphology and structure Tree physiology, 1991, 8: 129-143.

[10] Houllier F., Bouchon J., Birot Y. Modulisation de la dynamique des peuplements forestierst tat et perspectives Revue Forestiere Fran aise, 1991, XLIII(2): 87-108.

[11] Kajihara M. Studies on the morphology and dimensions of tree crowns in even-aged stand of sugi. J. Crown form J. Jpn. For. Soc., 1975, 57: 425-431.

[12] Kajihara M. Studies on the morphology and dimensions of tree crowns in even-aged stand of sugi. III. Development of crown morphology with growing stage J. Jpn. For. Soc., 1976, 58: 313-320.

[13] Kajihara M. Studies on the morphology and dimensions of tree crowns in even-aged stand of sugi. V. Crown surface area and crown volume J. Jpn. For. Soc., 1977, 59: 233-240.

[14] Leban J.M., Duchanois G. SIMQUA: Un logiciel de simulation de la qualit des bois Ann. Sci. For., 1990, 47(5): 483-493.

[15] Hai Madgwick, Co Tann, Mao-Yi Fu Crown development in young Picea abies stand J. For. Res., 1986, 1: 195-204.

[16] Maguire D.A., Hann D.W. A stem dissection technique for dating branch mortality and reconstructing past crown recession Forest Science, 1987, 33(4): 858-871.

[17] Mitchell, K.J. 1975. Dynamics and simulated yield of Douglas fir. Forest Science, Monograph 17, 39p

[18] Ottorini J.M. Growth and development of individual Douglas-fir in stands for applications to simulation in silviculture Ann. Sci. For., 1991, 48(6): 651-666.

[19] SAS Institute. 1988. SAS/STAT. Guide for personal computers. 1028p.

[20] Satoo T., Imoto H. Modelling crown canopy of an even-aged stand of Cryptomeria japonica from measurement of leaf mass: A new approach to the mophology of forest crown J. Jpn. For. Soc., 1979, 61: 127-134.

[21] Tome M., Burkhart H.E. Distance-dependent competition measures for predicting growth of individual tree For. Sci., 1989, 35: 816-831.