Abstract: [Objective] This project aims to study the soil physicochemical properties of degraded alpine grassland and soil nutrient characteristics in Bayinbuluk in the hope of providing a theoretical basis for rational utilization of grassland degradation.[Method]Using conventional soil physical and chemical detection method to analyze soil organic matter, total nitrogen, total phosphorus, total potassium, alkali-hydrolyzable nitrogen, available phosphorus, available potassium, pH, soil moisture and bulk density index in Bayanbulak degraded grassland.[Result]With degradation degree aggravated, the contents of soil organic matter, total nitrogen, total phosphorus, available phosphorus and soil water content in the different layers of soil (0-30 cm) declined, but soil bulk density and pH showed a trend of increase.Compared with non degraded areas, the content of soil organic matter, total nitrogen, total phosphorus, alkali-hydrolyzable nitrogen, available phosphorus and soil water decreased between 25.22;-31.96;, 37.69;-48.44;, 28.00;-28.98;, 35.53;-52.47;, 33.89;-44.84; and 35.44;-57.62; in each soil layer (0-30 cm).The available potassium in the soil layer of 20-30 cm increased remarkably after heavy degradation, which was 1.96 times higher than that of the non degraded land.Total K content showed no significant difference (P>0.05).[Conclusion]Soil nutrient contents decreased significantly in different alpine grasslands in Bayanbulak.

摘要： [目的]研究巴音布鲁克高寒草原退化草地土壤理化性状、土壤养分特征,为退化草地合理利用提供理论依据.[方法]采用常规土壤理化性质测定方法,对巴音布鲁克高寒草原退化草地土壤有机碳、全氮、全磷、全钾、碱解氮、速效磷、速效钾、土壤水分及容重等特征进行分析.[结果]随着草地退化程度的加剧,土壤各层(0~30 cm)有机碳、全氮、全磷、碱解氮、速效磷、含水量均呈下降趋势;而容重和pH值呈增加趋势;与未退化草地相比,重度退化草地土壤各层(0~30 cm)有机碳、全氮、全磷、碱解氮、速效磷和含水量分别降低了25.22;~31.96;、37.69;~48.44;、28.00;~30.24;、35.53;~52.47;、33.89;~44.84;和35.44;~57.62;;重度退化草地20~30 cm土层速效钾含量显著高于未退化草地,是未退化草地的1.96倍;全钾含量对退化程度的响应不明显(P>0.05).[结论]巴音布鲁克高寒草原不同退化草地土壤养分含量明显下降.