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Enhancing photosynthetic efficiency and nutrient uptake in Maize (Zea mays L.) using extracellular polymeric substances recovered from waste sludge

2025-12-11Documento de conferência Acesso aberto
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dc.contributor.authorAmorim, Catarina L.
dc.contributor.authorPereira, Sofia I. A.
dc.contributor.authorSousa, Ana S. S.
dc.contributor.authorWilfert, Philipp
dc.contributor.authorLoosdrecht, Mark van
dc.contributor.authorMartins, António
dc.contributor.authorCastro, Paula M. L.
dc.contributor.authorMiranda, Catarina
dc.date.accessioned2026-01-12T17:19:47Z
dc.date.available2026-01-12T17:19:47Z
dc.date.issued2025-12-11
dc.description.abstractExtracellular polymeric substances (EPSs) are biopolymers that can be recovered from waste aerobic granular sludge (AGS) generated in wastewater treatment plants (WWTPs). These biopolymers represent a valuable resource with attractive attributes, making them suitable for applications across different sectors. In agriculture, EPSs have attracted growing interest, although their beneficial effects are still underexplored. In a 7-week greenhouse experiment, the effects of EPSs recovered from waste AGS sourced from two WWTPs (Utrecht (EPS_U) and Faro (EPS_F)) and a lab-scale reactor (EPS_R) on maize growth, photosynthetic efficiency, and nutrient uptake and use efficiency were explored. EPSs were incorporated into the soil at doses of 0.5% and 1% (w/w), and their effects were evaluated against equivalent doses of vermicompost and non-amended soil (control). EPS incorporation, especially with 1% EPS_R, enhanced stem thickness and shoot fresh weight, whereas lower doses of other EPS sources and vermicompost had only marginal effects. Additionally, EPSs, regardless of their source, markedly enhanced the chlorophyll content compared to plants grown in non-amended soils, demonstrating their role in enhancing nutrient availability and maize photosynthetic efficiency. Moreover, the incorporation of EPS_R_1% and EPS_F_1% markedly increased the Mg and K uptake by 46% and 34%, respectively, compared to the control. Some EPS treatments were also able to increase the use efficiency of Ca, K, Na, and Zn, compared to plants in vermicompost-treated soils. As such, EPSs can effectively enhance the availability, uptake, and use of nutrients in maize. The study highlights the potential of waste-derived biopolymers to enhance maize nutritional traits and physiological responses while promoting sustainable agricultural practices and resource recovery strategies.eng
dc.identifier.citationMiranda, C., Pereira, S. I. A., Sousa, A. S. S., & Wilfert, P. et al. (2025). Enhancing photosynthetic efficiency and nutrient uptake in Maize (Zea mays L.) using extracellular polymeric substances recovered from waste sludge. 1-2. Abstract from The 5th International Electronic Conference on Agronomy, Basel, Switzerland.
dc.identifier.otherb05a7a52-9192-4616-b3ac-8bb0ed9ddb4c
dc.identifier.urihttp://hdl.handle.net/10400.14/56501
dc.language.isoeng
dc.peerreviewedyes
dc.rights.uriN/A
dc.subjectCircular economy
dc.subjectExtracellular polymeric substances
dc.subjectNutrient uptake
dc.subjectPhotosynthetic efficiency
dc.subjectResource recovery
dc.subjectSoil amendments
dc.titleEnhancing photosynthetic efficiency and nutrient uptake in Maize (Zea mays L.) using extracellular polymeric substances recovered from waste sludgeeng
dc.typeconference object
dspace.entity.typePublication
oaire.citation.endPage2
oaire.citation.startPage1
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85

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