利用从废弃咖啡渣中提取的生物螯合物对黄瓜进行铁的生物强化:温室试验

Agronomy Pub Date : 2024-09-09 DOI:10.3390/agronomy14092063
Ana Cervera-Mata, Leslie Lara-Ramos, José Ángel Rufián-Henares, Jesús Fernández-Bayo, Gabriel Delgado, Alejandro Fernández-Arteaga
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摘要

近年来,人们对将废咖啡渣(SCGs)转化为水合碳进行了广泛研究,以探索其在生物强化食品和减轻与 SCGs 相关的植物毒性方面的潜力。本研究旨在评估添加活化(ASCG 和 AH160)和功能化 SCG 以及 SCG 衍生的水合碳(ASCG-Fe 和 AH160-Fe)对黄瓜产量和植物铁含量的影响。为此,在温室中种植的黄瓜作物中加入了经铁活化和功能化的 SCGs 和 SCG 衍生的水螯合物,并进行了多次收获。在这些处理中,SCG-Fe 被证明对黄瓜生产最有前景,在三次收获中,每个处理平均累计产量为 25 公斤。在铁含量方面,所有收获期的平均结果表明,SCG 和功能化 SCG-hydrochars 与商业螯合物的性能相当(0.108 对 0.11 毫克铁/100 克鲜重)。然而,在随后的收获中,铁似乎会渗出,而活化的生物产品(ASCG 和 AH160)在土壤中留下的铁储量最高。此外,在 160 °C 下活化的水炭利用效率最高。总之,加入 SCG 残留物和第二代残留物(水炭)有望成为黄瓜生物强化剂。
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Biofortification of Cucumbers with Iron Using Bio-Chelates Derived from Spent Coffee Grounds: A Greenhouse Trial
The transformation of spent coffee grounds (SCGs) into hydrochars has been extensively studied in recent years to explore their potential in biofortifying foods and mitigating the plant toxicity associated with SCGs. This study aimed to evaluate the effects of adding activated (ASCG and AH160) and functionalized SCGs, as well as SCG-derived hydrochars (ASCG-Fe and AH160-Fe), on cucumber production and plant iron content. To achieve this, SCGs and SCG-derived hydrochars activated and functionalized with Fe were incorporated into cucumber crops grown in a greenhouse over multiple harvests. Among the treatments, SCG-Fe proved to be the most promising for cucumber production, yielding an average of 25 kg of cumulative production per treatment across three harvests. Regarding iron content, the average results across all harvests showed that SCGs and functionalized SCG-hydrochars matched the performance of the commercial chelate (0.108 vs. 0.11 mg Fe/100 g fresh weight). However, in subsequent harvests, iron appeared to leach out, with the activated bio-products (ASCG and AH160) leaving the highest iron reserves in the soil. Additionally, the hydrochar activated at 160 °C demonstrated the highest utilization efficiency. In conclusion, the incorporation of SCG residues and second-generation residues (hydrochars) shows promise as agents for biofortifying cucumbers.
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