为阐明岩溶石漠化区植被恢复对土壤氮素积累与供应的影响,分析了土壤各级团聚体不同形态氮库分配特征以及团聚体氮库与土壤氮素矿化之间的关系.结果表明:1各样地土壤团聚体全氮、轻组氮、碱解氮、矿质氮含量基本上随团聚体粒径减小而升高,峰值出现在<0.25 mm粒径.除矿质氮外,各种氮形态在不同样地之间,总体上表现为弃耕地<草地<灌丛地<灌乔林地<乔木林地、人工金银花地<人工林地.2各粒径团聚体有机氮库容量受团聚体粒径质量分数控制,其中5~10mm、2~5 mm粒径团聚体有机氮库容量较大,土壤氮主要贮存于大团聚体中,大团聚体对土壤碳、氮的贮存有重要意义.3团聚体全氮贮量中,0.25~1 mm、5~10 mm、2~5 mm粒径对土壤净氮矿化量贡献大,其它粒径贡献较小.随植被恢复进程,土壤中>5 mm粒径团聚体质量分数逐渐提高,大团聚体氮贮量相应提高,在增强土壤供氮能力的同时,加强了对有机氮的贮存与保护. In order to elucidate the effect of vegetation restoration on soil nitrogen accumulation and supply in karst rocky desertification area, the distribution characteristics of different forms of nitrogen pools at different soil aggregates and the relationships between soil nitrogen pools and nitrogen mineralization were analyzed. : 1 The contents of total nitrogen, light nitrogen, basic nitrogen and mineral nitrogen in soil aggregates increased with the decrease of aggregate size, and the peak appeared in <0.25 mm particle size. The forms of nitrogen were in different plots, and the overall performance was abandoned farmland