一、荒山土壤的理化性质我们所选择的荒山土壤为发育在花岗岩母质上的侵蚀暗棕壤,土壤贫瘠干燥,由于坡度陡,土壤常受到水土流失的侵蚀,A 层残留较薄,山顶部表层砂石裸露,山的中下部A 层厚度可达8—14厘米.1.典型剖面A 0～10厘米,色暗灰,砾质砂壤,疏松多草本植物根,大于1毫米石砾含量为49.1%C_1 10～34厘米,为棕色的花岗风化砂, First, the physical and chemical properties of barren mountain soil The selected barren mountain soil is eroded dark brown soil on the granite parent material. The soil is barren and dry. Due to the steep slope, the soil is often eroded by soil erosion, and the remaining layer A is thin. The top surface of the mountain Gravel bare, the mountain middle and lower A layer thickness of up to 8-14 cm. A typical cross-section A 0 ~ 10 cm, dark gray, gravel sandy soil, loose roots of more herbs, more than 1 mm gravel content 49.1% C_1 10 ~ 34 cm, the brown granite weathering sand,