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首页> 外文期刊>Clean >Evaporation Process in Soil Surface Containing Calcic Nodules on the Northern Loess Plateau of China by Simulated Experiments
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Evaporation Process in Soil Surface Containing Calcic Nodules on the Northern Loess Plateau of China by Simulated Experiments

机译：黄土高原北部含钙结节土壤表面蒸发过程的模拟实验

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摘要

Soil containing calcic nodules is widely present on the northern Loess Plateau of China owing to soil genesis under local climate conditions. In most studies, little attention is payed to the effect of calcic nodules on soil evaporation and ecoenviron-ment, resulting in inaccurate evaporation estimation in this kind of soil and further improper field water management measures and irrigation effects. In this paper, soil column experiments were conducted in order to investigate evaporation process in soil containing calcic nodules and the effect of calcic nodules on soil evaporation was determined. The results indicated that evaporation reduction was positively related to calcic nodule content (CNC = mass of calcic nodules/total mass), and could be estimated by the experiential equation: E_(soil) = E_0(1 - 0.4 CNC) (E_(soil) = actual evaporation, E_0 = theory evaporation in soil without calcic nodules). When CNC was below 0.2, the impact could be neglected. While, as CNC exceeded 0.2, the impact needed to be considered during soil evaporation estimation. As CNC reached 0.5, soil evaporation could be reduced by 7.5 mm, accounting for around 10% of the total soil water. Water balance calculation in soil columns showed that water absorbed by calcic nodules was partially available to evaporation. Water available to evaporation was positively related to CNC, and this water could not exceed 63% of the water absorbed by calcic nodules. Generally, evaporation behavior was dominated by calcic nodule quantity and its water absorption. These results provide new ideas for irrigation measures in arid areas of the globe.
机译：由于当地气候条件下的土壤成因，含钙结节的土壤广泛存在于中国黄土高原北部。在大多数研究中，很少关注钙化结节对土壤蒸发和生态环境的影响，从而导致这类土壤的蒸发估算不准确，并进一步导致不适当的田间水管理措施和灌溉效果。为了研究含钙结节的土壤中的蒸发过程，进行了土壤柱试验，并确定了钙结节对土壤蒸发的影响。结果表明，蒸发减少与钙化结节含量（CNC =钙化结节质量/总质量）成正相关，并且可以通过经验方程式估算：E_（土壤）= E_0（1- 0.4 CNC）（E_（土壤）=实际蒸发量，E_0 =没有钙结节的土壤中的理论蒸发量）。当CNC低于0.2时，影响可以忽略不计。而当CNC超过0.2时，需要在土壤蒸发量估算中考虑影响。当CNC达到0.5时，土壤蒸发量可减少7.5 mm，约占土壤总水分的10％。土壤柱中水平衡的计算表明，钙结节吸收的水部分可用于蒸发。可蒸发的水与CNC呈正相关，并且该水不能超过钙化结节吸收的水的63％。通常，蒸发行为主要取决于钙化结节的数量及其吸水率。这些结果为全球干旱地区的灌溉措施提供了新思路。

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  • 来源
    《Clean》 |2009年第11期|866-871|共6页
  • 作者

    Yuanjun Zhu; Mingan Shao; Hongbo Shao;

  • 作者单位

    State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Northwest A and F University, Yangling, P. R. China;

    State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Northwest A and F University, Yangling, P. R. China;

    State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Northwest A and F University, Yangling, P. R. China Yantai Institute of Costal Zone Research for Sustainable Development, Chinese Academy of Sciences, Yantai, P. R. China Institute for Life Sciences, Qingdao University of Science and Technology, Qingdao 266042, P. R. China;

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  • 正文语种 eng
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  • 关键词

    calcic nodules; northern loess plateau of China; soil evaporation; soil surface; soil water cycle; water absorption and balance;

    机译：钙化结节;中国北部黄土高原;土壤蒸发土壤表面土壤水循环吸水与平衡;

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