Abstract

A pot experiment was conducted using maize (Zea mays L.) as the host plant grown in cadmium (Cd)-polluted soil and inoculated with an arbuscular mycorrhizal fungus (AMF), Funneliformis mosseae. The effects of AMF on Cd uptake by maize, water-stable aggregate proportion, Cd concentration in pore water and Cd leaching were investigated. The results showed that AMF significantly promoted maize biomass and Cd uptake in shoots, and increased the content of total and easily extractable glomalin-related soil protein in the 0–40 cm soil layers. Furthermore, AMF increased the proportion of >0.85 mm water-stable aggregates (macroaggregates) by 47–88% and decreased the available Cd content in soil by 20–24%. During the first and second leaching events, AMF significantly decreased the Cd concentration in pore water, and reduced the Cd leaching loss from soil by 12.6% and 19.9%, respectively. Correlation analysis indicated that the macroaggregate proportion was positively correlated with the total and easily extractable glomalin-related soil protein content and negatively correlated with the Cd concentration in pore water, and the Cd concentration in pore water was positively correlated with the Cd leaching loss from soil. Therefore, the AMF-reduced Cd leaching was closely related to the increased macroaggregate proportion in soil.

Novelty statement

AMF significantly increased the GRSP content and the macroaggregate proportion in soil, which contributed to reducing the Cd concentration in pore water and its leaching loss from soil.

中文翻译：

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丛枝菌根真菌增加了大骨料的比例，减少了镉从污染土壤中的浸出

摘要

使用玉米（Zea mays L.）作为寄主植物，在镉（Cd）污染的土壤中生长并接种丛枝菌根真菌（Funneliformis mosseae），进行盆栽实验。研究了AMF对玉米吸收Cd，水稳性骨料比例，孔隙水中Cd浓度和Cd浸出的影响。结果表明，AMF显着促进了芽中玉米生物量和Cd的吸收，并增加了0-40 cm土壤层中总的和易于提取的gloomalin相关土壤蛋白的含量。此外，AMF使> 0.85毫米水稳性团聚体（宏观团聚体）的比例增加了47％至88％，土壤中的有效Cd含量降低了20％至24％。在第一次和第二次浸出过程中，AMF显着降低了孔隙水中Cd的浓度，并使土壤中Cd的浸出损失分别降低了12.6％和19.9％。相关分析表明，大骨料比例与总的和易于提取的gloomalin相关的土壤蛋白质含量呈正相关，与孔隙水中的Cd含量呈负相关，孔隙水中的Cd含量与土壤中Cd的淋失量呈正相关。 。因此，AMF减少的Cd浸出与土壤中大骨料比例的增加密切相关。

新颖性声明

AMF显着增加了土壤中GRSP的含量和大骨料的比例，这有助于降低孔隙水中Cd的浓度及其从土壤中的淋失。