As an important species in arid valley,brushwood is widespread in the upper reaches of Minjiang river,human deforestation,reclamation and overgrazing are the fundamental driving forces for its degradation.By selecting soil profiles under brushwood vegetation,meanwhile,taking farmland(50 a) and abandoned land(10 a) as references,soil organic carbon(SOC),heavy-fraction organic matter(HF-OM) and readily oxidizable carbon(ROC) for these soil profiles were analyzed and compared.The results indicated that:The SOC...