Cheng Liping, Lian Jiapan, Wang Xin, Munir Mehr Ahmed Mujtaba, Huang Xiwei, He Zhenli, Xu Chengjian, Tong Wenbin, Yang Xiaoe
Ministry of Education (MOE) Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resources Sciences, Zhejiang University, Hangzhou 310058, China.
State Key Laboratory for Conservation and Utilization of Subtropical Agri-Biological Resources, Guangxi University, Nanning 530004, China.
Plants (Basel). 2025 Jan 6;14(1):141. doi: 10.3390/plants14010141.
Soil amendments combined with low cadmium (Cd)-accumulating crops are commonly used for remediating Cd contamination and ensuring food safety. However, the combined effects of soil amendments and the cultivation of faba beans ( L.)-known for their high nutritional quality and low Cd accumulation-in moderately Cd-contaminated soils remain underexplored. This study investigates the impact of a soil amendment (SA) on agronomic traits, seed nutrition, and Cd accumulation in 11 faba bean genotypes grown in acidic soil (1.3 mg·kg Cd, pH 5.39). The SA treatment increased soil pH to 6.0 (an 11.31% increase) and reduced DTPA-Cd by 37.1%. Although the average yield of faba beans decreased marginally by 8.74%, it remained within the 10% national permissible limit. Notably, SA treatment reduced Cd concentration in seeds by 60% and significantly mitigated Mn and Al toxicity. Additionally, SA treatment enhanced levels of essential macronutrients (Ca, Mg, P, S) and micronutrients (Mo, Cu) while lowering Phytate (Phy)/Ca, Phy/Mg, and Phy/P ratios, thus improving mineral nutrient bioavailability. Among the genotypes, F3, F5, and F6 showed the most favorable balance of nutrient quality, and yield following SA application. This study provides valuable insights into the effectiveness of SA for nutrient fortification and Cd contamination mitigation in Cd-contaminated farmland.
土壤改良剂与低镉积累作物相结合常用于修复镉污染并确保食品安全。然而，在中度镉污染土壤中，土壤改良剂与蚕豆（因其高营养品质和低镉积累而闻名）种植的联合效应仍未得到充分研究。本研究调查了土壤改良剂（SA）对在酸性土壤（镉含量1.3 mg·kg，pH 5.39）中种植的11种蚕豆基因型的农艺性状、种子营养和镉积累的影响。SA处理使土壤pH值升至6.0（增加了11.31%），并使DTPA - 镉降低了37.1%。虽然蚕豆的平均产量略有下降，降幅为8.74%，但仍在国家允许的10%范围内。值得注意的是，SA处理使种子中的镉浓度降低了60%，并显著减轻了锰和铝的毒性。此外，SA处理提高了必需常量营养素（钙、镁、磷、硫）和微量营养素（钼、铜）的含量，同时降低了植酸盐（Phy）/钙、Phy/镁和Phy/磷的比例，从而提高了矿质养分的生物有效性。在这些基因型中，F3、F5和F6在施用SA后表现出最有利的营养品质和产量平衡。本研究为SA在镉污染农田中强化养分和减轻镉污染的有效性提供了有价值的见解。
