雷州刚果12号桉W5无性系林分蓄积量与胸径树高密度及其之间关系的探讨

采用雷州林业局2002年森林二类调查的刚果12号桉W5无性系林分1071块样地中279块样地材料，进行蓄积量与胸径、树高、密度及其之间关系的探讨分析。分析结果表明：胸径是影响林分蓄积量的主要因素，其次是树高与密度；树高与胸径关系密切，呈正相关，但两者的生长随着造林密度的加大而显著下降。因此，进行W5无性系林分密度试验，提出合理的造林密度，是提高其单位面积蓄积量的关键。

Study on the Relationship between the Volume and Diameter,Height, Density of Eucalyptus 12 ABL (W5) in Leizhou

Leizhou Forest Bureau carried out forest management inventory on Eucalyptus 12 ABL (W5 clone) in 2002. According to the inventory data of 279 plots random sampled from 1 071 plots, the paper analysed the relationship between the stand volume and diameter on breast height, height, planting density. The results showed that diameter is the main factor influenced stand volume, height and density are the next. Height and diameter have closely positive correlation relationship, but they both decreased when the density increased. So it is concluded that planting density is the key factor influenced stand volume.;