格氏栲林窗内外土壤理化性质分析

格氏栲（Castanopsis kawakamii）树种的幼苗为适应生长环境的变化,在长期演化过程中在生物量和养分分配等方面渐渐地形成了一些适应生存环境竞争的特征。为了使格氏栲天然林保持群落物种的多样性和促进格氏栲天然林种群的更新与繁殖,对格氏栲林窗内外土壤理化性质进行了试验研究,结果表明：在表层土壤中,林窗的土壤容重高于林内;在下层土壤中,林窗的容重低于林内。在同土壤层次,林窗与林内相比,土壤毛管孔隙度和总孔隙度的数值林窗都要高,而土壤非毛管孔隙度、非毛管孔隙度同毛管孔隙度比值、土壤通气度则低。说明在土壤保水性方面,林窗要好于林内;在通气性与透水性方面,林内要好于林窗。

Physical Chemical Properties Inside and Outside of the Forest Gap of Castanopsis kawakamii

In order to adapt to changes of growth environment for seedlings of C .kawakamii ,a number of character-istics were gradually formed in process of the long-term evolution in biomass nutrient allocation to adapt to the competition of the living environment .In order to preserve the species diversity ,and in order to promote populations of regeneration breeding for C .kawakamii plantation ,soil physical chemical properties inside outside of the forest gap for C .kawakamii were studied .Result shows that ：in the surface soil ,the soil bulk density of forest gap is higher than that in the forest ;in the lower soil ,the soil bulk density of forest gap is lower than that in the forest ;in the same level of the soil ,soil capillary porosity and the total porosity in the forest gap are all higher than that in the forest .Soil non-capillary porosity ,non-capillary porosity with capillary porosity ratio ,soil aeration degree is low-er .It illustrates that ：in the soil water retention areas ,forest gap is optimal than that in the forest ;in terms of ven-tilation water permeability ,the forest gap is no better than that in the forest .