| 近地表水文条件对横坡垄作坡面褐土团聚体流失的影响 |
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| 引用本文： | 安娟,陈新军,宋红丽. 近地表水文条件对横坡垄作坡面褐土团聚体流失的影响[J]. 土壤学报, 2020, 57(6): 1411-1421 |
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| 作者姓名： | 安娟 陈新军 宋红丽 |
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| 作者单位： | 山东省水土保持与环境保育重点实验室,临沂市水利局,山东省水土保持与环境保育重点实验室 |
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| 基金项目： | 国家自然科学基金项目(41301292, 41977067, 41601086) |
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| 摘 要： | 以横垄褐土坡面为研究对象,基于室内模拟降雨试验,就3种近地表水文条件下(自由入渗、土壤饱和与渗流)团聚体(≥5、2～5、1～2、0.5～1、0.25～0.5、<0.25 mm)在不同雨强(30,60,和90 mm·h–1)下的流失规律进行了探究。结果表明:(1)团聚体流失量的差异表现为:渗流>土壤饱和>自由入渗,且随雨强变化土壤水分饱和与渗流对团聚体流失的贡献较水势差分别显著增加2.02倍～3.71倍和1.28倍～2.51倍;(2)土壤饱和与渗流的存在致使2～5、1～2、0.5～1 mm团聚体的流失比例增加46.74%～121.19%,而削弱了90%以上0.25～0.5 mm团聚体的流失;(3)土壤饱和与渗流使>0.5 mm团聚体的富集率增加了23.77%～215.80%,但导致0.25～0.5 mm团聚体的富集率减少45.07%～68.90%,主要是因为0.25～0.5mm团聚体在侵蚀过程中发生了团聚;(4)平均重量直径是反映自由入渗与土壤饱和条件下团聚体流失的重要指标,而渗流条件下则为分形维数;(5)雨强对团聚体流失的影响在自由入渗条件下表现最明显,尤其是对...
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| 关 键 词： | 团聚体流失粒径分布 富集率 团聚体流失特征指标 渗流 横坡垄作 |
| 收稿时间： | 2019-05-18 |
| 修稿时间： | 2019-11-25 |
Characteristic of soil aggregate loss on cinnamon soil slope within contour ridge system under different soil surface hydrological conditions |
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| AN Juan,CHEN Xinjun and SONG Hongli. Characteristic of soil aggregate loss on cinnamon soil slope within contour ridge system under different soil surface hydrological conditions[J]. Acta Pedologica Sinica, 2020, 57(6): 1411-1421 |
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| Authors: | AN Juan CHEN Xinjun SONG Hongli |
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| Affiliation: | Shandong Provincial Key Laboratory of Water and Soil Conservation and Environmental Protection, College of Resources and Environment, Linyi University, Linyi,Linyi Conservancy Bureau, Linyi,Shandong Provincial Key Laboratory of Water and Soil Conservation and Environmental Protection, College of Resources and Environment, Linyi University, Linyi |
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| Abstract: | |
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| Keywords: | Size distribution of soil aggregate loss Enrich rate characteristic indices of lost soil aggregate Seepage Rainfall intensity Contour ridge system. |
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