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通过对云南晋宁、罗平、西畴和彝良等四个主产区杉木的物理力学试验,得出其气干密度和各项力学强度指标与国内其它地区所产者相比属于中等。而西畴产杉木的直径生长速度和全国中心产区湘南、桂北相近,较为速生。栽培品种灰叶杉的生长轮宽度大于当地杉木本种28％,是一个特别速生的杉木品种。本文运用数理统计方法,求得了杉木气干密度与各项力学强度指标间的相关系数和回归直线方程,以便推算或预测杉木的有关物理力学指标。
Through the physical and mechanical tests of four main producing areas of Jinning, LuoPing, Xichou and YiLiang in Yunnan Province, it is concluded that the air-dry density and each mechanical strength index are medium compared with those produced in other areas in China. However, the diameter growth rate of Xizhong fir production is similar to that of the southern Hunan and Guangxi provinces in the central part of China, which is relatively fast growing. The cultivated species Cinnabarinum has a growth wheel width greater than 28% of the native species of Cunninghamia lanceolata and is a particularly fast-growing Chinese fir species. In this paper, using the mathematical statistics method, the correlation coefficient between the dry density of fir and each mechanical strength index and regression linear equation were obtained in order to calculate or predict the relevant physical and mechanical indicators of Chinese fir.