调查分析了青藏高原东部高寒草甸、高寒灌丛草甸、亚高寒草甸、沼泽化草甸、荒漠化草原、林间草地、盐渍化沼泽土壤碳氮磷含量垂直分布特征。结果表明,7种草地类型中,土壤有机碳含量大体随着土层的深入而降低,0～15cm土层土壤有机碳的累积量从高到低依次为林间草地〉高寒灌丛草甸〉高寒草甸〉沼泽化草甸〉盐渍化沼泽〉亚高寒草甸〉荒漠化草甸（P〈0.05）;随土层深度变化土壤全氮含量与有机碳相似,0～15cm全氮累积量从高到低依次为沼泽化草甸〉林间草地〉高寒灌丛草甸〉高寒草甸〉盐渍化沼泽〉荒漠化草原〉亚高寒草甸（P〈0.05）;荒漠化草原、林间草地和土壤全磷含量随土层深度无明显规律性,0～15cm土层全磷累积量由高到低依次为高寒灌丛草甸〉沼泽化草甸〉高寒草甸〉盐渍化沼泽〉亚高寒草甸〉荒漠化草原〉林间草地（P〈0.05）;随土层深度的增加不同草地类型养分含量顺序不同。除沼泽化草甸,不同草地类型下土壤有机碳与全氮呈显著正相关。%The vertical distributions of carbon,nitrogen and phosphorous in the soil profiles in 7 grassland types in the eastern Tibetan Plateau were investigated.These grassland types were： alpine meadow,alpine shrub meadow,sub-alpine meadow,swamp meadow,desertified steppe,interforest grassland and saline-alkaline meadow.Our results showed that soil organic carbon decreased with soil depth in the 7 different grassland types,and that the cumulative amount of soil organic carbon at 0-15 cm depth in the 7 types was decreased in the following order： interforest grasslandalpine shrub meadowalpine meadowswamp meadowsaline-alkaline meadowsub-alpine meadowdesertified steppe（P0.05）.The dynamic of soil total nitrogen in soil depths was similar to that of soil organic carbon,and the cumulative amount of soil total nitrogen at 0-15 cm depth in the investigated types,from highest to lowest,was： swamp meadowinterforest grasslandalpine shrub meadowtestalpine meadowswamp meadowsaline-alkaline meadowdesertified steppesub-alpine meadow（P0.05）.Soil total phosphorus showed no obvious pattern in the desertified steppe and interforest grassland types,and the cumulative amount of soil total phosphorus at 0-15 cm depth in the 7 types was decreased in the following order： alpine shrub meadowswamp meadowalpine meadowsaline-alkaline meadowsub-alpine meadowdesertified steppeinterforest grassland（P0.05）.Soil nutrient distribution varies when soil depth increases in different grassland types.Soil organic carbon was significantly correlated with soil total nitrogen in all grassland types except the swamp meadow.
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