DENG Huai-min,Jilili·Abuduwaili,GE Yong-xiao.Analysis on the Characteristics of Dry Lakebed Sedimentary Soil in Ebinur, Xinjiang Uygur Autonomous Region[J].Research of Soil and Water Conservation,2013,20(06):14-18,36.
艾比湖干涸湖底盐漠土壤环境特征分析
- Title:
- Analysis on the Characteristics of Dry Lakebed Sedimentary Soil in Ebinur, Xinjiang Uygur Autonomous Region
- 分类号:
- S151.9
- 摘要:
- 在艾比湖东南部历史时期干涸湖底上选择一块长1 500 m，宽1 000 m的植被类型较丰富的采样带，用土钻分别采集深度为0—30 cm和30—60 cm的土壤样品，研究了新疆准噶尔盆地西部艾比湖干涸湖底沉积土壤的盐分、主要离子和有机质的季节性变化和空间分布特征。结果表明：（1）干涸湖底表层（0—30 cm）沉积物盐分平均值占整个采样层（0—60 cm）沉积物盐分平均值的73.3％，沉积物盐分垂直分布呈现出强烈的表聚性。（2）5—10月份土壤盐分的空间分布发生了很大的变化，在垂直剖面上自下向上盐分增加，在水平剖面上秋季盐分大于春季，蒸发作用对干涸湖底的土壤盐分分布有很大的作用。（3）艾比湖干涸湖底不同离子空间变异的一般规律是除了Ca2+离子以外，表层土壤比深层土壤的变异系数大。（4）土壤的有机碳和有机质含量10月份较5月份略有升高，盐漠植物在生命活动中对其地表有机碳和有机质的调节作用使其分布格局发生了一定的变化。
- Abstract:
- In historical period of dry lake bed of Ebinur Lake Southeast, a sampling belt with abundant vegetation type of length of 1 500 m and wide 1 000 m was chosen to study the seasonal variation and distribution characteristics of the major ions, salinity and organic matter of dry lakebed sedimentary soil in the Ebinur region of Western Dzungaria, Xinjiang Province, China. Soil samples of 0—30 cm depth and 30—60 cm were collected with auger boring. The results indicated that the average value of salt content of surface soil (0—30 cm) accounts for 73.3% of the whole sampling layer (0-60 cm) in dry lakebed sediment. The vertical distribution of salinity sediments shows strong surface accumulation. The spatial distribution of soil salinity has undergone great changes from May to October. Soil salinity shows the increasing trend from bottom to top in the vertical profile, soil salinity in autumn is greater than that in summer in the horizontal section. Evaporation plays a significant role in spatial distribution of soil salinity in the dry lakebed. The general rule of spatial variation of different ion in Ebinur Lake dry lakebed is that the coefficient of variation of surface soil is greater than deep soil except Ca2+. The contents of soil organic carbon and organic matter are slightly higher in October than in May. Regulating effect of salt desert plant makes distribution pattern of the surface organic carbon and organic matter change in the process of its life activity.
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备注/Memo
收稿日期:2013-03-15;改回日期:2013-05-16。
基金项目:国家自然科学基金（41071139）；国家重点基础研究发展计划（2009CB825101）
作者简介:邓怀敏(1987-),男,甘肃省庆阳市人,硕士,主要从事气候与环境的研究。E-mail:dhuimin2008@126.com
通讯作者:吉力力·阿不都外力(1964-),男(维吾尔族),新疆拜城县人,研究员,主要从事干旱区资源环境、生态安全和景观变化研究。E-mail:jilil@ms.xjb.ac.cn