...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Catena: An Interdisciplinary Journal of Soil Science Hydrology-Geomorphology Focusing on Geoecology and Landscape Evolution >Assessing geomorphological and pedological processes in the genesis of pre-desert soils from southern Tunisia
【24h】

Assessing geomorphological and pedological processes in the genesis of pre-desert soils from southern Tunisia

机译：评估来自南部突尼斯南部海沙漠土壤成因的地貌和粪便过程

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Arid environments are fragile and the associated soils are subject to serious threats like water deficiency, erosion, salt accumulation, and loss of fertility. In this context, understanding the processes involved in soil genesis may contribute toward protecting land from degradation. This study highlights the interconnection between geomorphic and pedogenetic processes in soil formation of the Jeffara Plain, a pre-Saharan area of southern Tunisia. To reach this goal, one coastal oasis (Chenini Nahel) and two inland environments (Matmata Nouvelle and Menzel Habib) were studied. After geomorphological and pedological surveys, the soils were sampled by genetic horizons and characterized by physical, mineralogical, and chemical analyses, and by microscope observation. Field observations and laboratory data suggest that soil formation in the Jeffara Plain was a combination of additions and losses controlled by climate changes. At Chenini Nahel, the soils developed by accumulation of wind-blown sediments coming from a close area dominated by gypsum-bearing rocks. At Matmata Nouvelle, the soils mainly formed from sedimentation of repeated mudflows during a rainy period between 9000 and 5000 years before present, followed by drought periods. Finally, the soils of Menzel Habib developed from an early gypsum formation in the presence of a salt-rich water table and repeated cycles of sedimentation/deflation of wind-blown materials. The different genesis of these pre-desert soils produced characteristic B horizons: Byy horizons with poorly developed soil structure at Chenini Nahel, Bw horizons with a hard rupture-resistance at Matmata Nouvelle, and Bk horizons at depth due to intense sedimentation with CA + BC horizons at the surface due to the accretion of wind-blown materials at Menzel Habib.
机译：干旱的环境是脆弱的，相关的土壤受到水缺乏，侵蚀，盐积累和生育损失等严重威胁的影响。在这种情况下，了解土壤成因中所涉及的过程可能导致免于降解的土地。本研究突出了突尼斯南部撒哈拉群地区土壤形成地貌与产后过程的互连。为了达到这一目标，研究了一个沿海绿洲（Chenini Nahel）和两个内陆环境（Matmata Nouvelle和Menzel Habib）。在地貌和粪便调查之后，通过遗传视野进行采样，并通过物理，矿物学和化学分析来进行对抗，并通过显微镜观察。现场观察和实验室数据表明，杰弗拉平原中的土壤形成是通过气候变化控制的添加和损失的组合。在Chenini Nahel，通过由石膏承载岩石主导的封闭区域的风吹沉积物积累开发的土壤。在Matmata Nouvelle，土壤主要由重复泥流量的沉降，于9000到5000年之间的多重泥流动，然后是干旱期。最后，在富含盐的水位的情况下，从早期石膏形成和风吹材料的沉降/通气的重复循环发生，从早期石膏形成的土壤。这些预防土壤的不同成因产生了特征B视野：Chenini Nahel的土壤结构较差，BW视野，在Matmata Nouvelle的硬性抗断裂性，由于CA + BC强烈沉降，BW视野具有良好的抗破裂的地平线由于Menzel Habib的风吹材料的吸收，表面的视野。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号