【摘要】 通过对贵阳市环城林带三个代表性林区(场)的岩-土层剖面、岩(土)层的物质组成特征研究,认为林带的形成与岩(土)层密切相关。环城林带出露岩石主要为粉砂岩、页岩、泥岩和砂岩等碎屑岩石,该类岩石及其风化后形成的土层,主要为难溶而成土的硅酸盐矿物,化学组成主要为SiO2、Al2O3等成土组分,且碎屑岩类抗风化能力极弱,易风化成土。更多还原

【Abstract】 By study the material composition of rock(soil) of 3 forest zones of Guiyang tree belt,it’s thought the formation of tree belt has deep relation with rock(soil).The exposed rock in tree belt mainly are siltstone,shale,mudstone,sandstone and other clastic rocks,these rocks and the soil after weathering mainly is carbonate mineral which is hard to be dissolved,the chemical components mainly are SIO2,Al2O3 and so on,the anti-weathering ability of clastic rock is weak and easy to be soil.更多还原