Effects of Different Densities on Understory Vegetation Composition and Soil Physical Properties in Natural Secondary Pinus Tabulaeformis Forests
The changes in understory vegetation composition and soil physical properties with stand density were investiga-ted and analyzed,with 4 different density natural secondary Pinus tabulaeformis forests at Sandaochuan Forest Farm of Na-tional Forest Administration Bureau of Guandi Mountain in Shanxi Province as object.The results showed that there were a total of 70 species of plants belonging to 64 genera and 32 families in the natural secondary Pinus tabulaeformis forest.As the forest density increased,the species composition of the understory shrub and herbaceous layers changed and the number of species showed a decreasing trend.The soil bulk density of different soil layers showed a increasing trend,while the maximum soil water holding capacity and capillary water holding capacity showed a decreasing trend.Overall,in order to improve the vegetation composition and soil physical properties under natural secondary Pinus tabulaeformis forests,the stand density could be appropriately reduced.
Stand densityNatural secondary Pinus tabulaeformis forestVegetation compositionSoil physical properties
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万方数据
