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川中丘陵地区紫色岩石山,主要为遂宁组母质,虽有风化流失快的特点,但紫色岩石矿物质养分丰富,具有吸附能力的蒙脱石、水云母等粘粒矿物达10—2％,钙、镁为主体的阳离子交换量较高,缓冲性能大。紫色岩石质地细密,吸热性强,在昼夜温差、热胀冷缩的作用下,母质极易破碎成土,用人工掘起岩石暴露于地表3—6个月,就开始风化。川中气候温和,降雨量达1000毫米左右,如果在造林整地时,采用拦蓄雨水的工程措施,可将全
The purple rock mountain in central Sichuan hilly region is mainly composed of the parent material of Suining Formation. Although it has the characteristics of quick weathering and loss, the mineral resources of purple rock are rich in nutrients, such as montmorillonite and hydrous mica with adsorption capacity of 10-2% , The main cation exchange capacity of magnesium is high, and the buffer performance is high. Purple rock texture fine, endothermic and strong, in the temperature difference between day and night, thermal expansion and contraction under the action of the parent material is very easy to break into soil, artificial rock to the ground surface exposed 3-6 months, began to weathering. Sichuan mild climate, rainfall of about 1000 millimeters, if afforestation site, the use of engineering measures to intercept rainwater, can be all