闽中山地湿地松不同立地条件和不同密度的经营效果研究

Managemental Effect Study on Different Site Conditions and Densities of Pinus elliottii on Central Fujian Hilly Land

通过对21、22年生的闽中湿地松人工林不同造林密度和不同立地条件的生长效果研究,结果表明:坡位、表土层厚度对优势木树高有显著影响,但对林分平均树高无显著影响;坡向(阴、阳坡)对平均胸径存在显著差异,且阳坡明显优于阴坡。不同经营密度的林分平均胸径、单株材积差异显著,且随密度增大而减少;冠幅随密度增大而减少;在合理密度范围内,单株胸径、材积随密度增大而减少,但蓄积量却随密度增加而增大。

The results show that the slope position and surface soil layer thickness have a significant effect on the dominant tree height,but they haven't a significant effect on the stand average tree height;the significant difference between average dbh on slope positions (ubac and adret)exists,furthermore,the average dbh on adret is evidently superior to that on ubac.The differences of average dbh and singletree volume among stands with different managemental densities are evident,and they reduce with the increase of density;the singletree dbh and volume decrease with the increase of density in the reasonable density range,but the stocking increases with the increase of density.