• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of plant nutrition and soil science >Phosphorus fractions in preferential flow pathways and soil matrix in hillslope soils in the Thuringian Forest (Central Germany)
【24h】

Phosphorus fractions in preferential flow pathways and soil matrix in hillslope soils in the Thuringian Forest (Central Germany)

机译：图林根林山坡土壤中优先流动途径和土壤基质中的磷级分（德国中部）

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

Phosphorus (P) is primarily transported in soil through preferential flow pathways (PFP), which can rapidly move water and matter bypassing large portions of the soil. This study investigated the composition of P forms in PFPs and soil matrix in two profiles at a forested hillslope in the Thuringian Forest (Central Germany), in order to evaluate (1) the effect of PFPs on the distribution of P fractions in forest soils, and (2) how hillslope position influences P fractions and other chemical parameters. To characterize water and mass fluxes in the profiles, flow pathways were visualized using dye tracer experiments. Stained and unstained soil material was sampled to assess differences of chemical parameters in the PFPs and soil matrix, and tested for correlations between chemical parameters to determine the factors influencing P fractions in soils. The results revealed significantly higher P contents (total P and most P fractions) in the upslope profile compared to the downslope profile. This accumulation effect in the upper profile was also observed for C, N, Fe, and Mn. The distribution of flow patterns also differed between the two profiles with stronger vertical infiltration into mineral soil and more preferential flow along stones and roots in the upslope profile compared to the downslope profile. However, the observed difference could not be addressed to hillslope effects as both test plots were located in mid-slope position, but were strongly influenced by spatial heterogeneity (e.g., micro-relief). Furthermore, no statistically significant accumulation effect of P or other elements in PFPs compared to soil matrix was found. At the test site, the combination of high stone content with low potential for P sorption, and predominance of near-surface lateral flow, appears to have hampered the development of gradients in chemical parameters between PFPs and soil matrix.
机译：磷（P）主要通过优先流动途径（PFP）在土壤中运输，这可以迅速移动水和物质绕过土壤的大部分。本研究调查了在林林森林（德国中部）的森林山坡上的PFP和土壤基质中P形式的组成，以评估PFP对森林土壤中P分数分布的影响（1） （2）Hillslope位置如何影响P分数和其他化学参数。为了在型材中表征水和质量助熔剂，使用染料示踪实验可视化流动途径。取样染色和未染色的土壤材料，以评估PFP和土壤基质中的化学参数的差异，并测试化学参数之间的相关性，以确定影响土壤中P部分的因素。与下坡轮廓相比，结果显示在Upslope轮廓中显着较高的P含量（总P和大多数P分数）。对于C，N，Fe和Mn，也观察到上曲线中的该累积效果。流动模式的分布在两个曲线之间也不同于垂直渗透到矿物质土壤中的垂直渗透，并且与下坡轮廓相比，沿着顶板轮廓的石头和根部的更优先流动。然而，由于两个测试图位于中间斜率位置，因此观察到的差异不能解决山坡效应，但是受到空间异质性（例如，微浮雕）的强烈影响。此外，发现与土壤基质相比，PFP中P或其他元素的统计学上显着的积累效应。在测试部位，高石含量的组合具有低潜力的P吸收，以及近表面横向流动的优势似乎阻碍了PFP和土壤基质之间的化学参数梯度的发展。

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