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为确定高产脂云南松的早期选择指标,采用石蜡切片法对不同海拔、不同产脂量云南松的针叶、树干韧皮部和木质部的组成性树脂道特征进行解剖观察,结果表明：高产脂与低产脂云南松的针叶树脂道个数、树干木质部树脂道密度、韧皮部树脂道大小及单位长度树脂道数量存在极显著差异（P＜0.01）,但不同海拔之间无显著差异;高、低海拔高产脂云南松针叶树脂道数量分别比低产脂的高38.89％、30.34％,树干木质部树脂道密度分别高58.06％、48.48％,韧皮部树脂道大小分别高32.20％、29.73％,韧皮部单位长度树脂道数量分别高21.95％、38.51％.说明针叶树脂道数量、树干木质部树脂道密度及韧皮部树脂道大小3项指标,也可作为云南松产脂力评价的部分指标.

To determine the indicators of early selection of high yielding oleoresin Pinus yunnanensis, the structural features in conifer, phloem and xylem of branches of the different yielding oleoresin P. yunnanensis at different altitude were compared by using paraffin method. The results of statistical analysis showed that there were significant differences in the number of resin canals in conifer, the density of resin canals in the xylem of trunk, the area of resin canals in the phloem and the number of resin canals in unit length in the phloem between the high and low yielding: oleoresin P. yunnanensis (P<.01), whiles no significant difference in those features between different altitudes was observed. At high and low altitude, the number of resin canals, density of resin canals in the xylem, area of resin canals in the phloem and the number of resin canals in unit length in the phloem of high yielding oleoresin were 38.89% and 30.34%, 58.06% and 48.48%, 32.20% and 29.73%, 21.95% and 38.51% higher than those of l