论文部分内容阅读
在收取编制尾叶桉U6(E.urophylla u6)立木二元材积表数据和资料的同时,收集尾叶桉U6立木胶合板材(又称旋切板材)出材量数据与资料,在收取的1059株有效样木中取胸径7.0~18.9cm的886株样木的胶合板材的出材量数据用作编制尾叶桉U6立木胶合板材出材量表,经作检验精度可靠,高达99.54%,达一级精度;胸径与树高、胸径与出材量,树高与出材量的简相关系数分别为:r_(D-H)=0.986417,r_(D-V)=0.996893,r_(H-V)=0.972275;出材量与胸径与树高的复相关系数为:R_(V-D-H)=0.999166。胸径与树高、胸径与出材量,树高与出材量的简相关系数和出材量与胸径与树高的复相关系数均达极紧密程度,回归效果呈高度显著水平,F值为:F=26358.0**>F_(2.883)~(0.01)=4.64。故回归方程:V_(胶合板材)=4.096632×10~(-3)D~(2.098099)H~(-0.992394)在该林区适用。
At the same time collecting the data and data of the eucalyptus U6 (E.urophylla u6) birch bivariate volumetric table, collecting the data and information about the yield of Eucalyptus urophylla U6 standing plywood (also known as rotary cutting plate), collecting 1059 The effective sample of wood take DBH 7.0 ~ 18.9cm of 886 samples of wood plywood timber production data for the preparation of Eucalyptus urophylla U6 timber veneer sheet, by the test accuracy and reliable, up to 99.54%, up to First-order precision; The correlation coefficients of DBH, DBH, DBH and DBH were: r_ (DH) = 0.986417, r_ (DV) = 0.996893, r_ (HV) = 0.972275; The complex correlation coefficient between the amount of material and the diameter at breast height was: R_ (VDH) = 0.999166. The correlation coefficients of tree height, tree height, DBH, DBH, tree height and yield were both close correlations and complex correlation coefficients between DBH and DBH. The regression results were highly significant (F = : F = 26358.0 **> F_ (2.883) ~ (0.01) = 4.64. Therefore, regression equation: V_ (plywood) = 4.096632 × 10 ~ (-3) D ~ (2.098099) H ~ (-0.992394) in the forest area.