| 钙结石含量对土壤水分蒸发影响的模拟试验 |
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| 引用本文： | 朱元骏,邵明安.钙结石含量对土壤水分蒸发影响的模拟试验[J].农业工程学报,2010,26(2):77-81. |
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| 作者姓名： | 朱元骏 邵明安 |
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| 作者单位： | 西北农林科技大学水土保持研究所,杨凌,712100 |
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| 基金项目： | 国家自然科学基金（40801104）；中国科学院“西部之光”西部博士项目 |
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| 摘 要： | 通过在土柱中人工模拟黄土高原北部含钙结石土壤，在土壤总水分一致的情况下研究了钙结石含量对土壤水分蒸发过程的影响，以期为黄土高原特定土壤类型中土壤水平衡的计算和模拟提供试验依据。研究结果表明：不同钙结石质量分数（钙结石质量/（钙结石质量+土壤质量））的土壤水分累积蒸发在最初的7 d内差别不大，随后表现出一定的差异；试验期间不同处理的蒸发率差异很小。土壤水分蒸发量随钙结石质量分数的增加而降低，当钙结石质量分数为0.5时，土壤水分蒸发降低8 mm，占到土壤总水分的10%。土壤水分蒸发与钙结石含量之间的负相关关系与钙结石含量增加所导致的土壤含水率降低有关。钙结石对土壤水分蒸发的作用效果与钙结石吸水性、钙结石含量以及水分在钙结石和土壤之间的分配有关。
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| 关 键 词： | 土壤，蒸发，土壤含水率，钙结石，黄土高原 |
| 收稿时间： | 2009/2/18 0:00:00 |
| 修稿时间： | 2009/11/3 0:00:00 |
Simulation experiments on soil moisture evaporation affected by calcic nodule contents |
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| Zhu Yuanjun,Shao Ming'an.Simulation experiments on soil moisture evaporation affected by calcic nodule contents[J].Transactions of the Chinese Society of Agricultural Engineering,2010,26(2):77-81. |
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| Authors: | Zhu Yuanjun Shao Ming'an |
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| Institution: | Institute of Soil and Water Conservation/a>;Northwest Agriculture and Forestry University/a>;Yangling 712100/a>;China |
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| Abstract: | The effect of calcic nodule content on soil moisture evaporation process was investigated in soil columns with uniform water supplement by simulating soil containing calcic nodules on the Northern Loess Plateau. Its aim was to provide an experimental base for estimation and modeling of soil water balance in this soil on the Loess Plateau. The results indicated that the differences in cumulative evaporation between soils with different calcic nodule mass fractions (calcic nodule mass / (calcic nodule mss + soil mass)) were little during the initial seven days and then increased a bit in the next days. There were not obvious differences in soil moisture evaporation rates during the experimental period. Soil moisture evaporation decreased with the increasing of calcic nodule mass fraction in soils. When calcic nodule mass fraction reached 0.5, soil moisture evaporation amount decreased by 8 mm, accounting for 10% of total soil water content. The negative relationship between soil moisture evaporation and calcic nodule content could be attributed to the decrease of soil water content resulting from the increase of calcic nodule content. The impacts of calcic nodules on soil moisture evaporation should be attributed to water absorption capacity of calcic nodule and its content as well as water allocation between soil and calcic nodules. |
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| Keywords: | soils evaporation soil moisture calcic nodules Loess Plateau |
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