【摘要】 西藏耕种山地灌丛草原土分布地区，高寒的气候条件极大地抑制着土壤内生物化学过程，土壤矿物分解弱，风化程度低，化学元素迁移不甚活跃，土壤质地轻，粗骨性强．通过对供试土样的研究，得出西藏耕种山地灌丛草原土的基本形成过程是腐殖质积累过程和钙积过程，同时伴有弱度粘化作用。更多还原

【Abstract】 The high cold climate conditions in cultivated shrub land soil regions in Tibet restrict the biochemstry changes greatly, making the soil with the characteristics of week mineral decomposition, low degree weathering, slow move of the chemical elements and light soil texture. Accompahied with week clayization, the basic forming process of the mountainous region soil is one of humus accumulation and cafe-accumulation.更多还原