...
  • 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 >Linking 3-D soil macropores and root architecture to near saturated hydraulic conductivity of typical meadow soil types in the Qinghai Lake Watershed, northeastern Qinghai-Tibet Plateau
【24h】

Linking 3-D soil macropores and root architecture to near saturated hydraulic conductivity of typical meadow soil types in the Qinghai Lake Watershed, northeastern Qinghai-Tibet Plateau

机译：将3-D土壤大孔和根系结构连接到青海湖流域典型草甸土壤类型附近的饱和水力电导率，东北青藏高原

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

The importance of soil macropores has been wildly recognized, which permit the rapid flow of water through soils. However, few studies have focused on the soil macropores of different alpine meadow soil in cold environments in the Qinghai-Tibet Plateau. This study aims to use computed tomography to quantify the soil macropore and root architecture of Meadow swamp soil, Sub-alpine shrub meadow soil, Sub-alpine grassland meadow soil and Sub-alpine meadow soil in the Qinghai Lake Watershed of the northeastern Qinghai-Tibet Plateau. A total of twelve soil cores (0-50 cm deep) were collected at four typical soil types under alpine meadow, with three replicates. At each site, the collected cores were scanned using the X-ray 3D microscope (Nano Voxel-2000, Sanying Precision Instruments Co., Ltd.). The soil macropores and root architecture of the soil cores were explored using the X-ray computed tomography method. The results indicated that the Meadow swamp soil and Sub-alpine shrub meadow soil had higher macropores than Sub-alpine grassland meadow soil and Sub-alpine meadow soil. Sub-alpine grassland meadow soil and Sub-alpine meadow soil had macropores that were mainly concentrated in the 0-100-mm soil depth. Moreover, macropore networks of Meadow swamp soil and Sub-alpine shrub meadow soil were more convoluted and continuous than those of Sub-alpine grassland meadow soil and Sub-alpine meadow soil. Root density was greater in the Meadow swamp soil and Sub-alpine shrub meadow soil than those in the Sub-alpine meadow soil and Sub-alpine grassland meadow soil. The soil macropore architecture with a high continuity could facilitate greater water flow to deeper soil layers in the Meadow swamp soil and Sub-alpine shrub meadow soil than in the Sub-alpine grassland meadow soil and Sub-alpine meadow soil. Root density, root node density, length density and surface area density and branch density were important parameters influencing soil macropore. Soil macropore length density was significantly and positively correlated to soil near saturated hydraulic conductivity K (10). Soil water status and alpine shrub root induce greater macroporosity of Meadow swamp soil and Sub-alpine shrub meadow soil than Sub-alpine grassland meadow soil and Sub-alpine meadow soil, and thus present a greater likelihood of larger macropores.
机译：土壤大孔的重要性已经被彻底认识到，允许通过土壤的快速流动。然而，很少有研究过于青藏高原冷环境中不同高山草甸土壤的土壤宏伟。本研究旨在使用计算机断层扫描来量化草甸沼泽土壤，亚高山灌木草甸土壤，亚高山草原草甸土壤和亚高山草地土壤的土壤巨大和根系结构在东北北西藏青海湖流域高原。在高山草地下，在四种典型的土壤类型中收集了12种土壤核心（0-50厘米深），三种重复。在每个网站上，使用X射线3D显微镜（纳米voxel-2000，三明精密仪器有限公司）扫描收集的核心。使用X射线计算断层扫描方法探索土壤核心的土壤大孔和根系结构。结果表明，草甸沼泽土壤和亚高山灌木草甸土壤比亚高山草地草甸土壤和亚高山草甸土壤更高。亚高山草原草甸土壤和亚高山草甸土壤具有主要集中在0-100毫米的土壤深度中的宏观孔。此外，Meadow沼泽土壤和亚高山灌木草甸土壤的大孔网络比亚高山草地草甸土壤和亚高山草甸土壤更加复杂和连续。草甸沼泽土壤和亚高山灌木草甸土壤中的根密度大于亚高山草甸土壤和亚高山草地草甸土壤的土壤。具有高连续性的土壤大孔建筑可以促进更大的水流向草地沼泽土壤和亚高山灌木草甸土壤中更深的土壤层，而不是亚高山草地草甸土壤和亚高山草甸土壤。根密度，根节点密度，长度密度和表面积密度和分支密度是影响土壤大孔的重要参数。土壤大孔长度密度与饱和液压导电性k（10）附近的土壤显着呈呈呈呈呈正相关。土壤水状况和高山灌木根系诱导草甸沼泽土壤和亚高山灌木草甸土壤的大渗透度，而不是亚高山草地草甸土壤和亚高山草甸土壤，因此具有较大的大孔的可能性更大。

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