Scholarlink

<p>Karst regions are characterized by naturally high levels of heavy metals such as cadmium (Cd), lead (Pb), and zinc (Zn). In these areas, traditional methods of non-ferrous metal smelting, which often lack treatment for wastewater, gases, and slag, frequently result in significant exogenous heavy metal contamination. This study investigates the effect of two contaminated soils; i) geological high background soil without external pollution (G) and ii) zinc smelting contaminated soil (Z) with external pollution from zinc powder factory and two Chinese cabbage (<i>Brassica rapa L. var. pekinensis</i>) varieties: i) Jincai No. 3 (J), and ii) Beijing Xin No. 3 (B) having high and low Cd accumulation capability on plant heavy metal accumulation, soil enzyme activities, microbial communities, and soil fauna diversity to elucidate how different plant varieties interact with distinct soil conditions. The results revealed significant variations in heavy metal uptake between cabbage varieties, influenced by soil properties. Cd concentrations in J and B varieties were 0.93 and 0.97&#xa0;mg/kg in Z soil, respectively, compared to 0.19 and 0.15&#xa0;mg/kg in G soil. Similarly, Zn concentrations were almost four times higher in Z soil. Soil enzyme activities varied between treatments, with higher catalase (CAT) and urease (URE) activities observed in Z soil, while G soil exhibited greater acid phosphatase (ACP) and sucrase (SUC) activities. High-throughput sequencing and soil fauna studies revealed substantial differences in microbial and faunal community composition and diversity associated with two soils and two cabbage varieties. Redundancy analysis (RDA) showed that As, URE, and Ni significantly influenced the bacterial community structure, whereas CEC, ACP, and pH were critical for the fungal communities. The study offers insights into phytoremediation strategies and soil health management by highlighting the complex interactions between soil contamination, heavy metal uptake by plants, and microbial community dynamics, with the goal of reducing pollution and enhancing ecosystem health in contaminated karst areas.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effect of two Karst-contaminated soils and Chinese cabbage varieties on heavy metal uptake, soil enzyme activities, microbial communities, and soil fauna diversity

  • 期刊论文

  • 发表日期：

    2025年11月1日

查看全文
  • Ghulam Rasool,
  • Hongyan Liu,
  • Jiujun Xiao,
  • Xuexian Li,
  • Chunyan Li,
  • Zichen Gu,
  • Hai Zhang

摘要

Karst regions are characterized by naturally high levels of heavy metals such as cadmium (Cd), lead (Pb), and zinc (Zn). In these areas, traditional methods of non-ferrous metal smelting, which often lack treatment for wastewater, gases, and slag, frequently result in significant exogenous heavy metal contamination. This study investigates the effect of two contaminated soils; i) geological high background soil without external pollution (G) and ii) zinc smelting contaminated soil (Z) with external pollution from zinc powder factory and two Chinese cabbage (Brassica rapa L. var. pekinensis) varieties: i) Jincai No. 3 (J), and ii) Beijing Xin No. 3 (B) having high and low Cd accumulation capability on plant heavy metal accumulation, soil enzyme activities, microbial communities, and soil fauna diversity to elucidate how different plant varieties interact with distinct soil conditions. The results revealed significant variations in heavy metal uptake between cabbage varieties, influenced by soil properties. Cd concentrations in J and B varieties were 0.93 and 0.97 mg/kg in Z soil, respectively, compared to 0.19 and 0.15 mg/kg in G soil. Similarly, Zn concentrations were almost four times higher in Z soil. Soil enzyme activities varied between treatments, with higher catalase (CAT) and urease (URE) activities observed in Z soil, while G soil exhibited greater acid phosphatase (ACP) and sucrase (SUC) activities. High-throughput sequencing and soil fauna studies revealed substantial differences in microbial and faunal community composition and diversity associated with two soils and two cabbage varieties. Redundancy analysis (RDA) showed that As, URE, and Ni significantly influenced the bacterial community structure, whereas CEC, ACP, and pH were critical for the fungal communities. The study offers insights into phytoremediation strategies and soil health management by highlighting the complex interactions between soil contamination, heavy metal uptake by plants, and microbial community dynamics, with the goal of reducing pollution and enhancing ecosystem health in contaminated karst areas.