Availability and Shoot Cadmium Content in Wheat Differentially Respond to Liming: The Impact of Exchangeable Calcium and pH in Bulk and Rhizosphere Soil

IF 3.5 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Water, Air, & Soil Pollution Pub Date : 2026-10-17 DOI:10.1007/s11270-026-10066-6

Mahboobe Safari Sinegani, Maria Manzoor, Karl Hermann Mühling

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引用次数: 0

Abstract

Cadmium (Cd) contamination in soil poses significant risks to environmental and crop safety. One of the most important parameters controlling Cd uptake by plants from soil is pH. The role of soil pH in regulating Cd availability and its uptake by plants has been studied; however, no study has yet compared how pH changes in the rhizosphere and bulk soil differentially influence these processes. This study examined how nitrification inhibitor (3,4-Dimethylpyrazole phosphate (DMPP)) and lime affect Cd availability and concentration in wheat via modulating pH and calcium (Ca) availability in rhizosphere and bulk soil. Wheat was grown in acidic sandy soil under three lime application rates and two DMPP levels to investigate Cd accumulation. Our results indicated that DMPP application was associated with decreased rhizosphere pH, exchangeable Ca and Cd accumulation in wheat shoots. The impact of lime on shoot Cd varied depending on the presence of DMPP. Liming generally increased soil pH and exchangeable Ca and was associated with decreased plant-available Cd (CaCl₂-extractable Cd) in both bulk soil and the rhizosphere. In the absence of DMPP, liming was associated with a greater increase in exchangeable Ca in the rhizosphere and reduction in plant-available Cd (CaCl₂-extractable Cd) in the rhizosphere and bulk soil. Despite the decline in soil Cd availability, these changes were associated with higher Cd concentration and content in wheat shoots. In contrast, under DMPP application, liming decreased shoot Cd concentration but did not affect shoot Cd content, suggesting that DMPP may influence the response of shoot Cd concentration to liming. The results provide useful insights into Cd management in agricultural systems and may contribute to strategies for reducing Cd-related risks in crop production.

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小麦有效度和地上部镉含量对石灰的差异响应：根际土壤和根际土壤交换性钙和pH的影响

土壤中的镉（Cd）污染对环境和作物安全构成重大风险。土壤pH是控制植物从土壤中吸收Cd的最重要参数之一，土壤pH在调节植物Cd有效性及其吸收中的作用已被研究；然而，目前还没有研究比较根际和散装土壤的pH值变化对这些过程的不同影响。本研究考察了硝化抑制剂（3,4-二甲基吡唑磷酸盐（DMPP））和石灰如何通过调节根际和土壤中pH和钙（Ca）有效性来影响小麦的Cd有效性和浓度。以酸性砂质土壤为试验材料，在3种石灰施用量和2种DMPP水平下，对小麦的镉积累进行了研究。结果表明，施用DMPP可降低小麦根际pH值，降低地上部钙、镉的交换性积累。石灰对地上部Cd的影响因DMPP的存在而异。石灰一般会增加土壤pH值和交换性钙，并与块状土壤和根际植物有效镉（cacl2 -可提取Cd）的降低有关。在没有DMPP的情况下，石灰化与根际交换性钙的增加和根际和块状土壤中植物有效镉（cacl2 -可提取Cd）的减少有关。尽管土壤Cd有效性下降，但这些变化与小麦茎部Cd浓度和含量升高有关。施用DMPP使地上部Cd浓度降低，但对地上部Cd含量没有影响，说明DMPP可能影响地上部Cd浓度对石灰的响应。研究结果为农业系统中的Cd管理提供了有用的见解，并可能有助于制定减少作物生产中Cd相关风险的策略。

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来源期刊

Water, Air, & Soil Pollution 环境科学-环境科学

CiteScore

4.50

自引率

6.90%

发文量

448

审稿时长

2.6 months

期刊介绍： Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments. Articles should not be submitted that are of local interest only and do not advance international knowledge in environmental pollution and solutions to pollution. Articles that simply replicate known knowledge or techniques while researching a local pollution problem will normally be rejected without review. Submitted articles must have up-to-date references, employ the correct experimental replication and statistical analysis, where needed and contain a significant contribution to new knowledge. The publishing and editorial team sincerely appreciate your cooperation. Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.