大岗山针叶与阔叶林林分结构比较分析

为研究不同林分径级、树高结构差异,在江西大岗山地区设置样地,选取杉木纯林、马褂木纯林各4块,对样地进行每木检尺,运用SPSS对胸径和树高数据进行处理,对胸径、树高的相关关系进行线性拟合,结果表明:大岗山地区杉木纯林与马褂木纯林胸径、树高分布整体上符合正态分布,假设检验的P值均大于0.05,但曲线陡峭程度杉木纯林(-1.487)大于马褂木纯林(-1.670),曲线偏移程度杉木纯林(0.191)大于马褂木纯林(0.010),树高分布曲线陡峭程度马褂木纯林(2.407)大于杉木纯林(-1.706),曲线偏移程度马褂木纯林(1.134)大于杉木纯林(0.459)。

Stand structure comparative analysis of coniferous forest and broad-leaved forest in Dagang mountain

In order to study the discrimination of different stand's diameter class and the height distribution,4 Cunninghamia lanceolata plantation sample plots and 4 Liriodendron chinense plantation sample plots in Dagang mountain of Jiangxi province were set for the study,and we engaged gauging for each wood in sample area.SPSS was applied to deal with the data of DBH and height,and linear fitting was carried out on the relationshop between diameter at breast height and the height of tree.The data contrast analysis shows that by curve fitting,the DBH and tree height of Cunninghamia lanceolata plantation and Liriodendron chinense plantation accord with normal distribution.P values of hypothesis test were greater than 0.05,but the curve steep of Cunninghamia lanceolata plantation (1.487) was greater than that of Liriodendron chinense plantation (1.670);Curve deviation degree of Cunninghamia lanceolata plantation (0.191) was also greater than that of Liriodendron chinense plantation (0.010).The steepness of tree height distribution curve is Liriodendron chinense plantation (2.407)＞ Cunninghamia lanceolata plantation (-1.706).The degree of curve deviation is that Liriodendron chinense plantation(1.134) greater than that of Cunninghamia lanceolata plantation (0.459).