Demarcation of juvenile and mature woods of planted Chinese fir and its wood quality prediction

Abstract

According to the data of trashed length, micro fiber angle, air density, ring width and late wood percentage, with the analysis of optimum method of classification, the boundary line of juvenile wood and mature wood of planted Chinese fir (Cunninghamia lanceolata) was determined as the 14th year. Based on the variation pattern of these parameters, the prediction equations were established. Wood quality prediction can be realized by these equations. By error analysis between the values of measured data and the values of prediction data, it is found that the results of wood prediction of planted Chinese fire are satisfactory.

References

[1] Cheng Junqing. 1985. Wood Science. Chinese Forestry Press.

[2] Jian Li. Biological Wood Science. 1993, Harbin: Northeast forestry Univ. Press.

[3] Mohrdiek O.. Silvae Genetica, 1979, 28(2–3): 107-111.

[4] Panshin A. J., Zeeuw C. D.. Tested of wood Technology, 1980 Fourth edition Harbin: Mc Gran-Hill Book Co.

[5] Shen Xihuan. 1974. Foreign Forestry Science and Technology Material Information Division, China Forestry Science Institute, 33–35

[6] Jisen Shi. Research on heredity and variation of wood nature of Chinese fir. Journal of Nanjing Forestry University, 1987, 11(4): 15-23.

[7] Wang Jinman. 1994. Research on variation of wood nature and wood quality prediction of short-term industrial wood. Doctor Degree Thesis

[8] Zhonglun Wu. Chinese Fir. 1984, Beijing: Chinese Forestry Press

[9] Zhihong Ye. Research on heredity and variation of wood nature of Chinese fir. Journal of Nanjing Forestry University, 1987, 11(3): 1-10.

[10] Peizhong Ye. Research on Chinese Fir selection in early stage. Journal of Nanjing Forestry University, 1981, 5(1): 106-115.

[11] Zhou Yaguang. 1995. The study on variation pattern of properties of natural Changbai larch (Larix gmelinii) and prediction of wood properties. Master's Degree Thesis.