[1]李以恒,唐科明*,陈柯霖,等.长江上游地区土壤理化性质对土壤侵蚀阻力的影响[J].山地学报,2023,(4):469-477.[doi:10.16089/j.cnki.1008-2786.000763 ]
　LI Yiheng,TANG Keming*,CHEN Kelin,et al.Effects of Soil Physicochemical Properties on the Erosion Resistance of Soil in the Upper Yangtze River of China[J].Mountain Research,2023,(4):469-477.[doi:10.16089/j.cnki.1008-2786.000763 ]
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长江上游地区土壤理化性质对土壤侵蚀阻力的影响
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2023年第4期
页码:
469-477
栏目:
山地环境
出版日期:
2023-07-20

文章信息/Info

Title:
Effects of Soil Physicochemical Properties on the Erosion Resistance of Soil in the Upper Yangtze River of China
文章编号:
1008-2786-(2023)4-469-9
作者:
李以恒; 唐科明*; 陈柯霖; 吴怀雨; 康艺洋
(四川农业大学 水利水电学院,四川 雅安 625014)
Author(s):
LI Yiheng; TANG Keming*; CHEN Kelin; WU Huaiyu; KANG Yiyang
(College of Water Conservancy and Hydropower Engineering, Sichuan Agriculture University, Ya'an 625014, Sichuan, China)
关键词:
土壤侵蚀;  土壤理化性质;  细沟可蚀性;  临界剪切力;  长江上游
Keywords:
soil erosion;  soil physicochemical properties;  rill erodibility;  critical shear stress;  the upper Yangtze River
分类号:
S157.1
DOI:
10.16089/j.cnki.1008-2786.000763
文献标志码:
A
摘要:
长江上游地区土壤侵蚀严重,其侵蚀阻力的影响因素尚不明确。分析土壤理化性质,准确确定土壤侵蚀阻力,将为当地水土流失治理提供依据。本文在长江上游水土流失重点区域选择10个样点采集坡耕地土壤,测量土壤理化性质,基于水槽试验测定土壤分离能力,通过线性回归得到样点的土壤细沟可蚀性和临界剪切力,采用统计分析方法确定土壤理化性质对土壤侵蚀阻力的影响,构建区域土壤侵蚀阻力与理化性质的定量关系,并与采用WEPP模型的土壤侵蚀阻力值进行比较。结果表明:(1)样点间土壤细沟可蚀性与临界剪切力差异较大。土壤细沟可蚀性为0.106～0.250 m·s-1,均值为0.158 m·s-1; 土壤临界剪切力为1.189～2.340 Pa,均值为1.597 Pa。(2)土壤细沟可蚀性与土壤极细砂含量和有机质含量呈显著相关关系,细沟可蚀性随极细砂含量的增加呈线性形式增大,随有机质含量的增大呈指数形式减小,实测值与WEPP模型预测值相比偏小。(3)土壤临界剪切力与土壤粉粒含量显著相关,随粉粒含量的增加线性减小,实测值与WEPP模型预测值相比偏大。研究结果可为长江上游地区坡耕地水土流失预报与治理提供数据支撑与理论依据。
Abstract:
Although soil erosion in the upper Yangtze River is extremely serious, the influencing factors of inherent soil resistance to soil erosion had been kept unclear, which prevented local authorities from efficient local soil-water loss control. Analyzing the influence of soil physicochemical properties on soil erosion resistance in the region can lead to accurate determination of soil erosion resistance and provide an instruction for water and soil conservation campaign. In this study, 10 sites on hillslope farmland were selected for soil sampling representative of the key soil and water loss areas in the upper Yangtze River of China, following by lab tests of soil physicochemical properties; it conducted in-door flume experiments for measurement of soil detachment capacity; then it obtained soil rill erodibility and critical shear stress at each sampling site by linear regression. Statistical analysis was used to quantify the effect of soil physicochemical properties on soil erodibility; then a region-scale quantitative correlation between soil erosion resistance and physicochemical properties was build suitable for the upper Yangtze River and calibrated with simulations obtained from a WEPP model. This research had the following results.(1)Soil rill erodibility and critical shear stress varied considerably according to sampling sites.The soil rill erodibility ranged from 0.106 to 0.250 m·s-1 at sampling sites, with a mean of 0.158 m·s-1. The critical shear stress ranged from 1.189 to 2.340 Pa at sampling sites, with a mean of 1.597 Pa.(2)Soil rill erodibility was significantly correlated with the content of very-fine-sand as well as organic matter in the soil. Measured soil rill erodibility increased linearly with the increase of very-fine-sand content and decreased exponentially with the increase of soil organic matter content, which were lower than the predicted values obtained from a WEPP model.(3)Measured soil critical shear stress was significantly correlated with soil silt content and decreased linearly with the increase of soil silt content, which was larger than the predicted values by the WEPP model. This research can provide data support and theoretical basis for soil and water loss prediction and control of sloping farmland in the upper Yangtze River of China.

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备注/Memo

备注/Memo:
收稿日期(Received date): 2023- 06- 09; 改回日期(Accepted date):2023- 08-15
基金项目(Foundation item): 国家自然科学基金(41601288); 四川省大学生创新训练计划项目(S202210626100)。[National Nature Science Foundation of China(41601288); Sichuan Province College Student Innovation Training Program(S20220626100)]
作者简介(Biography): 李以恒(1997-),男,湖北随州人,硕士研究生,主要研究方向:农业资源与环境。[LI Yiheng(1997-), male, born in Suizhou, Hubei province, M.Sc. candidate, research on agricultural resources and environment] E-mail: 874032150@qq.com.
*通讯作者(Corresponding author): 唐科明(1981-),男,四川广安人,博士,副教授,主要研究方向:土壤侵蚀与水土保持。[TANG Keming(1981-), male, born in Guang'an, Sichuan province, Ph.D., associate professor, research on soil erosion and soil and water conservation] E-mail: tangkeming1981@126.com
更新日期/Last Update: 2023-07-30