不同坡向樟子松人工林林分因子与密度关系的研究

Relationship between Stand Factors and Density of Man-made Pinus Sylvestris Forest on Different Slopes

文章以红花尔基20a生樟子松人工林为研究对象,测定研究了樟子松人工林林分因子与密度的关系。结果表明:在试验密度范围内,20a生樟子松人工林林分密度对平均胸径具有显著的影响;阳坡树高与密度无显著的相关性,而阴坡树高与林分密度呈幂函数负相关;阳坡的枝下高随密度的增大而增加,而阴坡的枝下高随着密度的增加而降低;阳坡冠幅与密度呈幂函数负相关,阴坡冠幅与密度无显著的相关性;林分密度对冠长具有较显著的影响,二者呈负相关关系;阳坡高径比与林分密度呈幂函数正相关;阴坡高径比与密度无显著的相关性;单株材积随林分密度的增加呈下降趋势;林分蓄积量随林分密度的增加呈上升趋势。

With man-made pinus sylvestris forest of 20 years in Honghuaerji as the object of research, the study focuses on the relationship between the stand factors and the density. The findings show that in the range of the tested stand density, the stand density has obvious influence on the average diameter at breast height; there is no significant correlation between the tree height on the sunny slope and density, but power function negative correlation between the tree height on the shady slope and stand density; clear bole height on the sunny slope increases with density, and that on the shady slope decreases with density; power function negative correlation between the canopy on the sunny slope and density, no significant correlation between the canopy on the shady slope and density; more remarkable influence of stand density on the crown length with a negative correlation; power function positive correlation between height-diameter ratio on the sunny slope and stand density and no significant correlation on the shady slope; the individual timber volume decreases with the increase of the stand density; the amount of stand stock increases with the increase of the stand density.