In the scenario of aridity and erosion, theprocesses of restoration of vegetation and types of vegetation exert significant influence onthe changes in SOC and nitrogen in these lands.

• 目标是揭示旱地农田施肥与作物轮作、植被恢复、植被类型对土壤有机碳库收支及生长自然植被和施氮条件下土壤矿质氮迁移的影响机制,明确黄土坡地土壤有机质与氮素流失与坡地地形特征的关系。