Relationship Between Soil Anti-scourability and Soil Physical Properties in Karst Mountain Areas

ZI Ruyi; ZHAO Longshan; QIAN Xiaohe; CHEN Juan

doi:10.13870/j.cnki.stbcxb.2022.03.004

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Relationship Between Soil Anti-scourability and Soil Physical Properties in Karst Mountain Areas

更新时间：2026-04-09

- Relationship Between Soil Anti-scourability and Soil Physical Properties in Karst Mountain Areas
- Vol. 36, Issue 3, Pages: 23-29(2022)
- 作者机构：
  
  1. 贵州大学林学院,贵阳,550025
  2. 贵州大学土壤侵蚀与生态修复研究中心,贵阳,550025
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2022.03.004
  CLC： S157.1
- Online First：27 May 2022，
  
  Published：2022
- 稿件说明：
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ZI Ruyi, ZHAO Longshan, QIAN Xiaohe, et al. Relationship Between Soil Anti-scourability and Soil Physical Properties in Karst Mountain Areas[J]. 2022, 36(3): 23-29.
DOI：

ZI Ruyi, ZHAO Longshan, QIAN Xiaohe, et al. Relationship Between Soil Anti-scourability and Soil Physical Properties in Karst Mountain Areas[J]. 2022, 36(3): 23-29. DOI： 10.13870/j.cnki.stbcxb.2022.03.004.

摘要

为探究喀斯特高原山地不同土地利用类型土壤抗冲性及其与土壤物理性质的关系

以马尾松人工林地(PMP)、桂花人工林地(OFP)、天然乔灌混交林地(ASL)、天然草地(NGL)、撂荒地(AL)、农地(CL)为研究对象

采用原状土水槽冲刷试验法

根据研究区地形及气候特点

设置3个坡度(5°

15°

25°)

3个冲刷流量(3.2

4.8

6.4 L/min)

冲刷时间均为15 min

结合土壤物理性质(容重、孔隙度、水稳性团聚体、机械组成等)

定量分析不同土地利用类型下土壤抗冲性及其与土壤物理性质的关系。结果表明:(1)在原状土冲刷试验过程中

各地类初始径流含沙量较高

但随着冲刷时间的延长

径流含沙量呈先降低后趋于稳定趋势

且随着坡度和冲刷流量的增大

径流含沙量趋于稳定的时间有所提前;(2)土壤抗冲系数随坡度和冲刷流量的增大而减小

且坡度对土壤抗冲性的影响比冲刷流量更明显。在同等条件下

各地类土壤抗冲系数依次为NGL＞PMP＞ASL＞AL＞OFP＞CL

土壤抗冲系数分别为13.44~87.84

[JP]8.14~93.15

2.93~45.36

1.21~10.01

1.25~5.48

0.17~1.27(L·min)/g;(3)土壤抗冲性与土壤容重、砂粒含量、水稳性团聚体含量呈极显著正相关(P＜0.01)

与总孔隙度、黏粒含量呈显著负相关(P＜0.05)

其关系均可用幂函数表示(R2＞0.78)。研究结果可为喀斯特区土壤侵蚀研究和水土保持防治提供科学依据。

Abstract

In order to study the soil anti-scourability and its relationship with soil physical properties in different land use types in karst area

taking Pinus Massoniana plantation land (PMP)

Osmanthus fragrans plantation land (OFP)

mixed forest land of natural arbor and shrub (ASL)

natural grassland (NGL)

abandoned land (AL) and cropland (CL) as research objects

the erosion test method of undisturbed soil flume was adopted

combining soil physical properties (bulk density

porosity

water-stable aggregates

mechanical composition

etc.)

soil anti-scourability and its relationship with soil physical properties under different land use were quantitative analyzed. In the experiment

3 slopes of 5°

15°

25° and 3 scour flows of 3.2

4.8

6.4 L/min were set up. The results showed that:(1) During the whole process of erosion test

the sediment concentration of runoff was the highest in the first 2 minutes of erosion

and then decreased gradually

and tended to be stable after 3~11 minutes. (2)The soil anti-scourability coefficient of each land use was NGL > PMP > ASL > AL > OFP > CL. The soil anti-scourability coefficient decreased with the increase of slope and erosion discharge

and the effect of slope on soil anti-scourability was more obvious than that of erosion discharge; (3) Soil anti-scourability was significantly positively correlated with soil bulk density

sand content and water-stable aggregate content (P < 0.01)

and negatively correlated with total porosity and clay content (P < 0.05)

which could be expressed by power function (R2>0.78). The results can provide scientific basis for soil erosion research and soil and water conservation control in karst area.

关键词

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