Mitigation of CO 2 , CH 4 and N 2 O from Acidic Clayey Soil Amended with Fertilizer Pellets Based on Alkaline Organic Re
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ORIGINAL PAPER
Mitigation of CO2, CH4 and N2O from Acidic Clayey Soil Amended with Fertilizer Pellets Based on Alkaline Organic Residues Emna Marouani1,2 · Noura Ziadi3 · Vicky Lévesque3 · Naïma Kolsi Benzina2 · Besma Bouslimi1 · Ahmed Koubaa1 Received: 19 May 2020 / Accepted: 5 October 2020 © Springer Nature B.V. 2020
Abstract Alkaline organic residues, such as wood ash (WA), deinking paper sludge (DPS), and mixed paper sludge (MPS) could have a significant potential for mitigating greenhouse gases (GHG) when they are used for land application. The DPS was mixed and then granulated with MPS, WA and/or composted DPS to form pellets. A 56-d incubation study was carried out to investigate the effect of alkaline organic residue pellets on: (1) the biological and chemical properties of acidic clayey soil; (2) on carbon dioxide (CO2), on methane (CH4), and nitrous oxide (N2O) soil emissions. The experimental design included eight different treatments: unfertilized control (Control), fertilized control with mineral nitrogen (controlF), and six pelleted alkaline organic residue amendments (T1–T6) combined with mineral nitrogen fertilizer. The six amendments were: (T1) 100% DPS; (T2) 100% composted [50% poultry manure and 50% T1]; (T3) 50%WA + 50% T1; (T4) 50% WA + 50% T2; (T5) 50%T2 + 30%WA + 20% MPS; (T6) 50% T1 + 30%WA + 20% MPS. The results showed that alkaline residues significantly increased soil pH, the concentration of water-extractable organic carbon, and water-extractable nitrogen. Alkaline treatments had a positive effect on soil microbial activity. The highest mitigation efficiency of cumulative C O2 was obtained with T4, which released 10% less C O2 than other treatments. No significant effect on cumulative C H4 emissions was observed. Total cumulative N2O emissions were reduced by 37% with T5. Our study also showed that organic pellets based on alkaline residues improved the soil properties and can play a role in the mitigation of GHG in acidic clayey soil. Therefore, the coapplication of alkaline organic residue pellets with chemical fertilizer might be considered as a sustainable approach in agriculture.
* Ahmed Koubaa [email protected] 1
Institut de recherche sur les forêts, Université du Québec en Abitibi-Témiscamingue, 445 Boulevard de l’Université, Rouyn‑Noranda, QC J9X 5E4, Canada
2
Laboratoire des Sciences Horticoles, Institut National Agronomique de Tunisie (INAT), 43 Charles Nicolle Avenue, 1082 Tunis, Tunisia
3
Quebec Research and Development Centre, Agriculture and Agri-Food Canada, 2560 boulevard Hochelaga, Quebec, QC G1V 2J3, Canada
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Waste and Biomass Valorization
Graphic Abstract
Keywords Organic amendment · Paper sludge · Wood ash · Priming effect · Fluorescein diacetate hydrolysis · Greenhouse gas emissions Abbreviations DPS Deinking paper sludge MPS Mixed paper sludge WA Wood ash FDA Fluorescein diacetate hydrolysis GHG Greenhouse gas WEOC Water-extractable organic carbon WEN Water-extractable nitrogen NP Neutralizing po
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