Effects of Green Manuring on Soil Health Improvement and Cadmium Immobilization–a Review Based on Meta-analysis

IF 9.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Current Pollution Reports Pub Date : 2026-03-30 DOI:10.1007/s40726-026-00403-y

Ting Liang, Danna Chang, Jiancheng Xie, Jinxin Sun, Cheng Cai, Xinyan Li, Weidong Cao

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引用次数: 0

Abstract

Purpose of Review

Global agricultural soils face severe degradation, with widespread issues like cadmium (Cd) contamination. Integrated strategies are required to concurrently remediate soil pollution and enhance soil fertility. This review aims to elucidate the effects and underlying mechanisms of green manuring on both the Cd bioavailability and soil quality in contaminated farmland under different environment and management factors.

Recent Findings

A meta-analysis of 50 recent peer-reviewed publications showed that green manuring is an effective practice for enhancing soil quality and mitigating Cd bioavailability. Compared to fallow, green manuring increased the soil quality index (SQI) and crop yield by 19.1% and 19.6%, respectively, while concurrently reducing crop Cd and soil available Cd (Avail-Cd) by 37.6% and 12.4%. Random forest analysis revealed that soil properties collectively influenced soil quality and Avail-Cd. Furthermore, SQI showed significant negative correlations with crop Cd, Avail-Cd, and exchangeable Cd. The efficacy of green manuring in reducing crop Cd was more pronounced in paddy fields than in dryland systems. Mechanistically, green manuring promoted soil Cd immobilization in both the two systems, but in paddy systems, the induction of iron-manganese plaque on root surfaces plays a critical and distinct role in suppressing Cd uptake.

Summary

Meta-analysis revealed that green manuring reduced Cd bioavailability by improving soil health. The background soil Cd concentration and soil organic matter content were the key factors affecting the effects of green manuring on controlling Avail-Cd and improving SQI. Overall, green manuring is an effective and potential pathway for safe crop production in Cd-contaminated fields.

Graphical Abstract

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绿色施肥对土壤健康改善和镉固定化的影响——基于meta分析的综述

综述目的全球农业土壤面临严重退化，镉污染等问题普遍存在。需要采取综合战略，同时修复土壤污染和提高土壤肥力。本文旨在探讨不同环境和管理因素下绿肥对污染农田Cd生物有效性和土壤质量的影响及其机制。一项对50篇同行评议出版物的荟萃分析表明，绿色施肥是提高土壤质量和降低镉生物有效性的有效做法。与休耕相比，绿肥使土壤质量指数（SQI）和作物产量分别提高19.1%和19.6%，同时使作物Cd和土壤有效Cd （availability -Cd）分别降低37.6%和12.4%。随机森林分析表明，土壤性质共同影响土壤质量和有效镉。此外，SQI与作物Cd、有效Cd和交换性Cd呈显著负相关。水田绿肥降低作物Cd的效果比旱地系统更明显。在机制上，绿肥促进了两种制度下土壤镉的固定，但在水稻制度下，诱导根表面铁锰斑块在抑制镉吸收方面起着关键而独特的作用。荟萃分析表明，绿肥通过改善土壤健康来降低Cd的生物有效性。土壤背景Cd浓度和土壤有机质含量是影响绿肥控制有效Cd和改善SQI效果的关键因素。综上所述，绿色施肥是cd污染农田安全生产的有效途径。图形抽象

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来源期刊

Current Pollution Reports Environmental Science-Water Science and Technology

CiteScore

12.10

自引率

1.40%

发文量

期刊介绍： Current Pollution Reports provides in-depth review articles contributed by international experts on the most significant developments in the field of environmental pollution.By presenting clear, insightful, balanced reviews that emphasize recently published papers of major importance, the journal elucidates current and emerging approaches to identification, characterization, treatment, management of pollutants and much more.