| 高潜水位矿区不同复垦方式下土壤热导率及其影响因素 |
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| 引用本文： | 闵祥宇,李新举.高潜水位矿区不同复垦方式下土壤热导率及其影响因素[J].水土保持学报,2017,31(3):176-181. |
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| 作者姓名： | 闵祥宇 李新举 |
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| 作者单位： | 山东农业大学资源与环境学院,山东泰安,271018 |
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| 基金项目： | 国家自然科学基金项目(41171425) |
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| 摘 要： | 以东部高潜水位采煤塌陷复垦耕地为研究对象,研究挖深垫浅复垦、充填复垦、预复垦3种复垦方式下土壤热导率的分布及原因。在3种复垦方式典型样地上开挖剖面,分别取0—20,20—40,40—60cm土层土样,经实验分析观测土壤热导率及相关物理指标。结果表明:(1)复垦方式、剖面层次和二者交互作用均是使热导率产生显著差别的因素(p0.01),对土壤热导率总体变异的贡献率分别为86.8%,89.6%,71.9%;(2)土壤热导率随土壤剖面深度增加呈先增加后降低的""型变化趋势;(3)复垦可以显著(p0.05)影响土壤热导率大小,并增加其在不同剖面层次上分布的差异;(4)在含水量和温度差异不大的条件下,土壤容重在1.205~1.593g/cm3时,砂粒含量为影响热导率的主要因素,当土壤容重在1.604~1.813g/cm3时,容重为影响热导率的主要因素。与未塌陷耕地相比,复垦土壤热导率偏低,在土层间分布差异性增加,因此应综合考虑容重和质地,从降低土壤容重的角度入手,改良复垦土壤热导率。
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| 关 键 词： | 高潜水位矿区 复垦土壤 复垦方式 土壤热导率 |
Soil Thermal Conductivity and Influencing Factors under Different Reclamation Modes in a Mining Area with High Groundwater Level |
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| MIN Xiangyu,LI Xinju.Soil Thermal Conductivity and Influencing Factors under Different Reclamation Modes in a Mining Area with High Groundwater Level[J].Journal of Soil and Water Conservation,2017,31(3):176-181. |
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| Authors: | MIN Xiangyu LI Xinju |
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| Institution: | College of Resources and Environment, Shandong Agricultural University, Taian Shandong 271018 |
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| Abstract: | Taking coal mining subsidence farmland with high groundwater level as the research object,the distribution of soil thermal conductivity and the influencing factors under three different reclamation modes,including regional leveling reclamation,filling reclamation,and dynamic reclamation were studied.In this research,soil profiles of three layers,i.e.0-20 cm,20-40 cm,and 40-60 cm,were dug in typical areas under three different reclamation modes.After collecting soil samples,soil thermal conductivity and other relevant physical indicators were acquired through experiments.The results indicated that reclamation mode,profile layer,and their interactions were the factors making the soil thermal conductivity different significantly (p ＜ 0.01),and the contribution rate was 86.8％,89.6％,and 71.9％,respectively.The changing trend of the soil conductivity showed a pattern of "＞" with the increasing of soil depth.Reclamation could influence soil thermal conductivity significantly (p ＜ 0.05),and increase its differentiation of distribution among soil layers.Under the same conditions of soil water content and temperature,soil silt content was the main factor affecting soil thermal conductivity when soil bulk density was between 1.205 g/cm3 and 1.593 g/cm3,while soil sand content was the main factor when soil bulk density was between 1.604 g/cm3 and 1.813 g/cm3.Thermal conductivity of reclaimed soils was lower than that of the normal soil,and its differentiation of distribution among soil layers was higher.Therefore,in order to improve thermal conductivity of reclaimed soils,soil bulk density and texture shou be taken into consideration comprehensively,and soil bulk density should be reduced. |
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| Keywords: | mining area with high groundwater level reclaimed soils reclamation modes soil thermal conductivity |
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