Objective To analyze the relationships between natural regeneration of Phoebe bournei and environmental factors in order to provide references for protecting and managing natural secondary P. bournei forest.
Method Based on data of sample plot investigation, a relationship model between saplings and seedlings importance values and environmental factors was established by quantitative model Ⅰ, and the effect of single environmental factor on natural regeneration was explored by using one-way ANOVA method in Ji'an Country, Jiangxi Province.
Result The results showed that the main elements affecting natural regeneration were density (amount of P. bournei parent tree, canopy density, tree density), position of slope, humus layer thickness, aspect of slope, coverage of understory vegetation, litter layer thickness, with the partial correlation coefficients being 0.325 7-0.715 7, which were significant or very significant by t test. The multiple correlation coefficient of the model reached 0.966, showing very significant by F test (F=30.96**).
Conclusion The amount of P. bournei parent tree plays an important role in natural regeneration of saplings and seedlings, while higher or lower of canopy density and tree density, thicker litter layer, thinner humus layer, higher coverage of understory vegetation are not helpful to natural regeneration. Meanwhile, natural regeneration of saplings and seedlings is better in semi-shady slope and lower slope than other aspect of slope and position of slope. Therefore, keeping at least 200 parent trees per hectare in the stand and controlling canopy density, coverage of understory vegetation, thickness of litter layer would be helpful to promote natural regeneration of saplings and seedlings.
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