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根据 6块标准地 2 13株调查样株材料 ,应用多元线性回归分析和逐步回归分析方法 ,进行了杜仲人工林丛干 (系指主干两个以上 )对皮、叶产量影响的研究。研究结果表明 ,杜仲胸径、丛干数、冠幅和树高生长与皮、叶产量关系非常密切 ,复回归检验和复相关分析均达到极显著水平 ,但不同因子对杜仲皮、叶产量的影响程度不同。胸径大小和丛干数多少是直接影响杜仲丛干皮重和全株皮重 (含侧枝皮重 )的主导因子 ;冠幅大小和树高是直接影响杜仲鲜叶产量的最关键的相关因子 ,而杜仲丛干数对鲜叶产量影响仅为冠幅、树高贡献率的 2 6.4 9%、32 .15%。
Based on the data of 6 samples of 6 standard samples, the effects of Eucommiae plantation (more than two stems) on skin and leaf yield were studied by multiple linear regression analysis and stepwise regression analysis. The results showed that the relationship between the DBH, the number of clumps, the crown width, the height growth and the leaf and leaf yield of Eucommia ulmoides Oliver were very close. Different degrees. The DBH and the number of trunks were the main factors which directly influenced the dry tare weight and tare weight of whole plant (including the shuck tare weight) of Eucommia ulmoides plexus community. The crown size and tree height were the most important correlative factors that directly affected the fresh leaf yield of Eucommia ulmoides, However, the effects of dry weight of Eucommia ulmoides on the yield of fresh leaves were only crown width, with the tree height contribution rate of 2 6.49% and 32.15%.