6Olsthoorn A F M,Bartelink H H, Gardiner J J, et al. Management of mixed-species forest: silviculture and economics [J]. IBN Scientific Contributions, 1999,15:381-389.
7De Steven D, Wright S J. Consequences of variable reproduction for seedling recruitment in three neotropical tree species[J]. Ecology, 2002,83 : 2315-2327.
8Jeffery P D, Lisa M R, Peter N. Understorey plant community characteristics and natural hardwood regeneration under three partial harvest treatments applied in a northern red oak (Quercus rubra L. ) stand in the Great Lakes-St. Lawrence forest region of Canada [J]. Forest Ecology and Management, 2008, 256:760-773.
9Zerbe S, Kreyer D. Influence of different forest conversion strategies on ground vegetation and tree regeneration in pine (Pinus sylvestris L. ) stands: a case study [J]. European Journal of Forest Research,2006,126(2):291-301.
10Kereher S M, Frieswyk C B, Zedler J B. Effects of sampling teams and estimation methods on the assessment of plant cover[J]. Journal of Vegetation Science, 2003,14:899-906.
