泥质页岩属片麻岩，ｐＨ值在６－７～６－９之间，土壤微酸，自然条件下风化速度缓慢，地表活土层薄，保水保肥能力差，岩层表面大多裸露，部分地块寸草不生，不易整地造林，难以开发利用。为加快造林步伐，提高森林覆被率，减少水土流失，我们于１９９２～１９９８年，立项进 Mud shale is gneiss, pH value of 6-7 ~ 6-9 between the soil slightly acidic, slow weathering in natural conditions, the surface of the living soil is thin, poor water retention and fertility, most of the exposed surface rock, Part of the plots are not born, not easy to reforest, difficult to exploit. To speed up the pace of afforestation, improve the forest cover rate, reduce soil erosion, we in 1992 ~ 1998, the project into