【摘要】 对266株思茅松高产脂优树的主要性状做相关性分析,其中环境因子包括海拔、坡位、坡向;树体因子包括树高、胸径、枝下高、郁闭度;产脂量数据包括日单刀产脂量、侧沟长。产脂力以单位产量(每厘米割沟24h产脂量)为评价指标。研究结果表明,与产脂量相关性最强的树体因子为胸径。胸径可以作为思茅松高产脂优树野外选择的主要指标。更多还原

【Abstract】 Relative analysis between per unit resin yield and altitude,slope position,slope aspect,tree height,diameter at breast height,low branch height,degree of canopy closure was made for 266 sample trees of high-yield rosin Pinus kesiya var.langbianensis.Per unite resin yield denotes the ratio of daily resin yield of each cut to length of side groove.Results showed that there was a significantly positive correlation between per unit resin yield and diameter at breast height.Therefore,diameter at breast height can be used as main index for selecting high-yield rosin P.kesiya var.langbianensis in field.更多还原