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在天然马尾松采脂林中进行高产脂优树选择，应用１～５株５种优势木对比法进行比较分析，确认３株优势木对比法的调查性状变异系数小、精度高，主要产量指标精度均可达到８３％以上，选择效果好．该法在实践中切实可行
In the natural Pinus massoniana forest, the high yielding tree was selected, and the comparative analysis of 1 to 5 strains of 5 dominant trees was carried out. The results showed that the coefficient of variation (CV) of the surveyed three dominant woods was small and the precision was high. The main yield indexes Accuracy can reach more than 83%, select the good effect. The law is practicable in practice