羌塘高原高寒湖盆区土壤属性分异特征研究——以查日那足山麓至湖滨地区为例

发布时间：2018-04-25 07:41

本文选题：土壤理化性状 + 高寒区　；参考：《地理研究》2017年11期

【摘要】：分析典型资料匮乏的高寒区——羌塘高原中部查日那足山麓湖盆区8个点位0~5 cm、5~10 cm、10~20 cm三个深度层次的22个土壤样品,分析改区域的土壤属性特征及其空间分异规律。研究发现:(1)研究区土壤p H值平均为8.9;有机质、全磷、全钾等养分含量低;钙、镁含量高;钠、钾、铁等元素含量低。(2)从湖滨到山麓,土壤中大于2 mm砾石含量呈逐渐降低的趋势,但细土物质平均粒径逐渐变大;土壤有机质、氮、钠、微量元素含量呈上升趋势,钙和镁呈下降趋势;其他指标波动较大。(3)土壤碳氮比稳定在5∶1左右;钙、镁含量呈显著正相关,钙镁与其他指标呈显著负相关;钾、钠与除钙、镁外的其他金属元素含量呈显著的正相关关系。
[Abstract]:This paper analyzes 22 soil samples at three depth levels of 0 ~ 5 cm ~ (5) ~ 5 ~ 10 cm ~ (10) ~ (10) cm ~ (10) ~ (20 cm) in the lake basin area of Charenaodu Mountain in the middle of Qiangtang Plateau, which are short of typical data, and analyzes the soil attribute characteristics and spatial differentiation law of the modified area. The study found that the average pH value of the soil in the study area is 8.9; the contents of organic matter, total phosphorus and potassium are low; the contents of calcium and magnesium are high; and the contents of sodium, potassium, iron and other elements are low from the lakeshore to the foothills. The content of gravel > 2 mm in soil decreased gradually, but the average particle size of fine soil gradually increased, the contents of organic matter, nitrogen, sodium and trace elements increased, and the contents of calcium and magnesium decreased. The C / N ratio of soil was stable at about 5:1, the contents of Ca and mg were positively correlated, the contents of Ca and mg were negatively correlated with other indexes, and the contents of K, Na and other metal elements except Ca and mg were positively correlated.
【作者单位】：中国科学院地理科学与资源研究所陆地表层格局与模拟重点实验室;中国科学院青藏高原地球科学卓越创新中心;
【基金】：国家科技基础性工作专项重点项目(2012FY111400) 中国科学院战略性先导科技专项(XDB03030500) 国家科技支撑计划(2013BAC04B02)
【分类号】：S153

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