喀斯特地质高背景区浅层裂隙土壤Cd剖面分布规律及其影响因素

范萍萍; 陈佳; 张峰; 牛勇; 方怒放; 吴泽燕; 蔡华银

doi:10.13870/j.cnki.stbcxb.2024.06.033

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喀斯特地质高背景区浅层裂隙土壤Cd剖面分布规律及其影响因素

更新时间：2025-02-18

- 喀斯特地质高背景区浅层裂隙土壤Cd剖面分布规律及其影响因素
- Distribution Pattern of Cadmium in the Profile of Shallow Fissure Soil and Its Influencing Factors in Karst Areas with High Geological Background
- 水土保持学报 2024年38卷第6期页码：310-321
- 作者机构：
  
  1. 贵州大学农学院,贵阳,550025
  2. 自然资源部岩溶生态系统与石漠化治理重点实验室, 中国地质科学院岩溶地质研究所,广西,桂林,541004
  3. 广西平果喀斯特生态系统国家野外科学观测研究站,广西,桂林,541004
  4. 西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨凌,712100
- 作者简介：
  
  [ "范萍萍(1995—),女,硕士研究生,主要从事土壤侵蚀对重金属迁移的影响研究。E-mail:gs.ppfan22@gzu.edu.cn" ]
- 基金信息：
  
  国家自然科学基金项目(42367047);自然资源部岩溶生态系统与石漠化治理重点实验室开放基金专项/广西岩溶动力学重大科技创新基地开放课题项目(YRSW-2023-086);中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室基金项目(F2010121002-202416)
- DOI：10.13870/j.cnki.stbcxb.2024.06.033
  中图分类号： X171.5
- 纸质出版：2024
- 稿件说明：
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范萍萍, 陈佳, 张峰, 等. 喀斯特地质高背景区浅层裂隙土壤Cd剖面分布规律及其影响因素[J]. 水土保持学报, 2024,38(6):310-321.

FAN Pingping, CHEN Jia, ZHANG Feng, et al. Distribution Pattern of Cadmium in the Profile of Shallow Fissure Soil and Its Influencing Factors in Karst Areas with High Geological Background[J]. 2024, 38(6): 310-321.
范萍萍, 陈佳, 张峰, 等. 喀斯特地质高背景区浅层裂隙土壤Cd剖面分布规律及其影响因素[J]. 水土保持学报, 2024,38(6):310-321. DOI： 10.13870/j.cnki.stbcxb.2024.06.033.

FAN Pingping, CHEN Jia, ZHANG Feng, et al. Distribution Pattern of Cadmium in the Profile of Shallow Fissure Soil and Its Influencing Factors in Karst Areas with High Geological Background[J]. 2024, 38(6): 310-321. DOI： 10.13870/j.cnki.stbcxb.2024.06.033.

摘要

[目的] 研究浅层喀斯特裂隙土壤Cd的剖面分布规律

分析不同因素对裂隙中Cd分布的影响状况

为今后研究地下裂隙土壤中Cd的分布规律及Cd污染防治提供科学依据。[方法] 以黔西北典型地质高背景区小流域为研究对象

系统分析浅层裂隙土壤Cd的全量和形态

以及pH、有机质含量、阳离子交换量(CEC)、粒径和团聚体等5种土壤性质指标

通过方差和相关分析阐明裂隙剖面土壤Cd的分布规律及其影响因子。[结果] (1)裂隙土壤的理化因子对Cd分布影响显著;(2)裂隙土壤pH平均为6.70

Cd含量平均为2.99 mg/kg

其剖面分布呈现0—20 cm富集

随土层深度增加逐渐减少

赋存形态以可还原态为主;(3)Cd全量主要受pH、CEC、黏粒、粉粒和水稳性团聚体的共同影响

但其剖面分布的主控因子是CEC;(4)Cd形态分布的控制因子则因形态而异

弱酸提取态的分布主要受有机质控制

可还原态主要受CEC控制

可氧化态受CEC、黏粒和粉粒共同影响

残渣态的主控因子为粉粒含量;(5)漏斗形和梯形裂隙剖面土壤Cd含量显著小于长方形裂隙剖面土壤Cd含量。[结论] 裂隙土壤Cd剖面分布规律受土壤理化性质和裂隙形态共同影响

长方形裂隙更易导致Cd的累积。

Abstract

[Objective] To study the vertical distribution pattern of cadmium (Cd) in shallow karst fissure soil

analyze the impacts of various factors on the distribution of Cd in fissures

and provide a scientific basis for future research on the distribution pattern of Cd in underground fissure soil and the prevention and control of Cd pollution. [Methods] Taking the small watershed of Baobao Mountain in Weining County

a region with a typical high geological background in the northwest of Guizhou

as the research object

the total Cd concentration and speciation of Cd in shallow fissure soil

along with five soil property indicators such as pH value

organic matter content

cation exchange capacity (CEC)

particle size

and aggregate were systematically analyzed. The distribution pattern of Cd and its influencing factors were examined using one-way ANOVA and correlation analysis. [Results] (1) The physical and chemical properties of the fissure soil significantly affected the distribution of Cd. (2) The average pH value of the fissure soil was 6.70. The average Cd concentration was 2.99 mg/kg

the concentration was high at 0—20 cm and gradually decreased with increasing soil depth

and Cd was predominantly in the reducible form. (3) Total Cd concentration was mainly influenced by soil pH

CEC

clay

silt

and water-stable aggregates

with CEC being the primary controlling factor for the vertical distribution of Cd. (4) The distribution of Cd speciation was controlled by different factors

depending on the form of Cd

with the weak acid-extractable form primarily influenced by organic matter

the reducible form mainly influenced by CEC

the oxidizable form mainly influenced by CEC

clay

and silt

and the residual form mainly influenced by silt content. (5) There was a significant difference in Cd concentration between the soils of funnel-shaped and trapezoidal fissure profiles and the rectangular fissure profile. [Conclusion] The vertical distribution pattern of Cd in fissure soil is jointly influenced by soil physicochemical properties and fissure morphology

with rectangular fissures being more conducive to the accumulation of Cd.

关键词

Keywords

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