School of Resource Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan, China.
Hunan Province Key Laboratory of Coal Resources Clean-utilization and Mine Environment Protection, Xiangtan, China.
J Sci Food Agric. 2024 Dec;104(15):9706-9718. doi: 10.1002/jsfa.13795. Epub 2024 Aug 7.
An issue of pressing concern is the manganese contamination in farmland soils adjacent to industrial areas. To address this, intercropping hyperaccumulator plants with crops emerges as a sustainable approach to ensuring food security. This study aims to investigate the influence of intercropping Sedum alfredii with maize or soybean on their growth and the dynamics of manganese accumulation through field experiments.
The results showed that compared with monoculture, the Sedum alfredii-maize intercropping system exhibited a land equivalent ratio (LER) of 1.89, signifying a 71.13% augmentation in bioaccumulation amount (BCA). Additionally, it led to a significant reduction in manganese content in various organs, ranging from 17.05% to 25.50%. However, the Sedum alfredii-soybean intercropping system demonstrated a LER of 1.94, accompanied by a 66.11% increase in BCA, but did not significantly reduce the manganese content in the roots, stems, and pods of soybeans. Furthermore, manganese accumulation in maize and soybean grains was primarily attributed to the aboveground translocation of manganese. The intercropping effect on blocking manganese absorption of maize during growth and maturity is primarily attributed to the earlier manganese accumulation in intercropped maize by 2.63 to 4.35 days, and a reduction of 21.95% in the maximum manganese accumulation rate.
The study found that manganese accumulation dynamics vary significantly depending on the crop family. Intercropping Sedum alfredii with maize enhances land-use efficiency and reduces manganese uptake by crops, making it a promising strategy for remediating manganese-contaminated farmland near industrial areas. © 2024 Society of Chemical Industry.
一个迫在眉睫的问题是工业区附近农田土壤中的锰污染。为了解决这个问题，将超富集植物与作物间作是确保粮食安全的一种可持续方法。本研究旨在通过田间试验研究超富集植物垂盆草与玉米或大豆间作对其生长和锰积累动态的影响。
结果表明，与单作相比，垂盆草-玉米间作系统的土地当量比（LER）为 1.89，生物积累量（BCA）增加了 71.13%。此外，它导致各种器官中的锰含量显著降低，范围从 17.05%到 25.50%。然而，垂盆草-大豆间作系统的 LER 为 1.94，BCA 增加了 66.11%，但大豆根部、茎部和豆荚中的锰含量没有显著降低。此外，玉米和大豆籽粒中锰的积累主要归因于锰的地上转运。间作对玉米在生长和成熟过程中吸收锰的阻断作用主要归因于间作玉米中锰的早期积累，比对照提前了 2.63 至 4.35 天，最大锰积累率降低了 21.95%。
研究发现，锰积累动态因作物科而异。垂盆草与玉米间作提高了土地利用效率，降低了作物对锰的吸收，这是一种很有前景的修复工业区附近受锰污染农田的策略。© 2024 化学工业协会。
