Abstract：
BACKGROUND: 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.
RESULTS: 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.
CONCLUSIONS: 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.
RESULTS: 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.
CONCLUSIONS: 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.
摘要：
背景：一个紧迫的问题是与工业区相邻的农田土壤中的锰污染。为了解决这个问题，将超累积植物与作物间作成为确保粮食安全的可持续方法。本研究旨在通过田间试验，研究仙草与玉米或大豆间作对其生长和锰积累动态的影响。
结果：结果表明，与单一文化相比，景天玉米间作系统的土地当量比（LER）为1.89，表明生物蓄积量（BCA）增加了71.13％。此外,它导致各种器官中锰含量的显著降低，从17.05%到25.50%不等。然而,Sedumalfredii-大豆间作系统表现出1.94的LER，伴随着BCA的66.11％的增加，但没有显著降低根中的锰含量，茎,和豆荚。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。间作对玉米生长和成熟过程中锰吸收的阻断作用主要归因于间作玉米在2.63至4.35天的早期锰积累。最大锰积累率降低21.95%。
结论：研究发现，锰的积累动态因作物家族而异。用玉米间作景天提高土地利用效率，减少作物对锰的吸收。使其成为修复工业区附近锰污染农田的有希望的策略。©2024化学工业学会。
结果：结果表明，与单一文化相比，景天玉米间作系统的土地当量比（LER）为1.89，表明生物蓄积量（BCA）增加了71.13％。此外,它导致各种器官中锰含量的显著降低，从17.05%到25.50%不等。然而,Sedumalfredii-大豆间作系统表现出1.94的LER，伴随着BCA的66.11％的增加，但没有显著降低根中的锰含量，茎,和豆荚。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。间作对玉米生长和成熟过程中锰吸收的阻断作用主要归因于间作玉米在2.63至4.35天的早期锰积累。最大锰积累率降低21.95%。
结论：研究发现，锰的积累动态因作物家族而异。用玉米间作景天提高土地利用效率，减少作物对锰的吸收。使其成为修复工业区附近锰污染农田的有希望的策略。©2024化学工业学会。
