巴音布鲁克高寒草原不同退化阶段土壤养分的变化  

Changes of Soil Nutrients in Different Degradation Stages of Alpine Steppe in Bayanbulak

作　　者：阿依敏.波拉提 安沙舟[1] 董乙强 张爱宁[1] 杨娇[1] Ayimin Bolati AN Sha - zhou DONG Yi - qiang ZHANG Ai - ning YANG Jiao(ollege of Pratacultural and Environmental Sciences / Key Laboratory of Grassland Resources and Ecology of Xinjiang, Xinjiang Agricultural University, Urumqi 830052, Chin)

机构地区：[1]新疆农业大学草业与环境科学学院/新疆草地资源与生态重点实验室,乌鲁木齐830052

出　　处：《新疆农业科学》2017年第5期953-960,共8页Xinjiang Agricultural Sciences

基　　金：国家自然科学基金项目"巴音布鲁克高寒湿地CO_2和CH_4排放对水分变化的响应(41305136)"~~

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。[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.

关 键 词：退化演替 高寒草原 土壤养分 有机碳 巴音布鲁克 

分 类 号：S14[农业科学—肥料学]