Organic Waste Recycling as Fertilising Practice in Agronomic Ecosystems

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Soil and Plant Nutrition".

Deadline for manuscript submissions: closed (25 June 2022) | Viewed by 4124

Special Issue Editor


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Guest Editor
CIRAD, UPR Recyclage et Risque, F-34398 Montpellier, France
Interests: soil geochemistry; soil; organic waste; transfer; contaminant; water and solute fluxes; pollutants; soil solution; risk of soil and water pollution; instrumentation; risk; pedology; reuse; water reuse

Special Issue Information

Dear Colleagues,

For thousands of years, the use of organic waste products in agriculture has mainly been aimed at providing nutrients to crops but also at transforming and recycling these resources. From the 19th century onwards, industrially produced mineral fertilisers gradually replaced organic waste products, sometimes completely, resulting in undeniable increases in crop yields in all agronomic conditions. However, the need to recycle organic waste products has continued to increase along with the quantities of waste produced; urbanisation is intensifying, and these waste products are accumulating farther and farther away from agricultural land.

In recent decades, the search for a way to optimise the recycling of organic waste products has been intensifying due to the rising costs of producing fertiliser and the need to limit resource wastage. Knowledge of long-term ecosystem benefits, e.g., improvement of physical, chemical and biological soil properties, and of the negative impacts of the production is renewing interest in recycling organic waste products.

As guest editor of this Special Issue of Agronomy, I invite researchers to provide insights into the different aspects of organic waste recycling in contexts in which constraints call for the urgent development and/or optimisation of soil ecosystem services and the recycling of such products.

Dr. Frédéric Feder
Guest Editor

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Keywords

  • organic waste
  • organic residue
  • soil
  • recycling
  • nutrients recycling
  • organic and conventional agriculture
  • organic fertiliser
  • composts
  • amendments
  • contaminants
  • pollutants
  • water reuse

Published Papers (2 papers)

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Research

16 pages, 2714 KiB  
Article
Mitigation of GHG Emissions from Soils Fertilized with Livestock Chain Residues
by Alessandra Lagomarsino, Massimo Valagussa, Carla Scotti, Lamberto Borrelli, Claudia Becagli and Alberto Tosca
Agronomy 2022, 12(7), 1593; https://doi.org/10.3390/agronomy12071593 - 30 Jun 2022
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Abstract
Using livestock residues as alternative fertilizers is a sustainable practice which recycles nutrients that would otherwise be lost. However, organic fertilizers may have a large impact on N2O emissions, offsetting the beneficial effects of C sequestration. After four years from biochar [...] Read more.
Using livestock residues as alternative fertilizers is a sustainable practice which recycles nutrients that would otherwise be lost. However, organic fertilizers may have a large impact on N2O emissions, offsetting the beneficial effects of C sequestration. After four years from biochar application, greenhouse gas fluxes were monitored for two years from a Maize field fertilized with digestate, slurry, or urea, with and without biochar. The objectives of the present study were to assess (i) the climate feedback of using residues from the livestock chain as alternative fertilizers and (ii) the contribution of biochar in mitigating GHGs emissions, while increasing the organic C in soil. Digestate was shown to have the highest impact on CO2 and N2O emissions from soil, with respect to mineral fertilization (+29 and +142%), more than slurry (+21 and −5%), whereas both residues positively affected CH4 uptake (+5 and +14%, respectively). The maximum N2O peaks occurred between 7–20 days after fertilization, accounting for 61% of total emissions, on average. Biochar was effective in reducing N2O emissions derived from mineral fertilization and digestate (−54% and −17%, respectively). An excess of labile organic matter and N induced the highest CO2 emissions and N2O peaks, independent of—or even triggered by—biochar. Mitigation of GHG emissions, from soils fertilized with livestock chain residue, can be obtained using biochar, but with limitations dependent on (i) the quantity of organic matter added, (ii) its quality, and (iii) the time from application: those aspects that deserve further investigations. Full article
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16 pages, 2362 KiB  
Article
Varying Effects of Organic Waste Products on Yields of Market Garden Crops in a 4-Year Field Experiment under Tropical Conditions
by Falilou Diallo, Samuel Legros, Karamoko Diarra and Frédéric Feder
Agronomy 2022, 12(1), 32; https://doi.org/10.3390/agronomy12010032 - 24 Dec 2021
Cited by 3 | Viewed by 2110
Abstract
Controlling organic and mineral fertilisation is a major concern in tropical environments. An experiment was conducted on an arenosol in the Dakar region, the main market gardening area of Senegal, to evaluate treatments commonly used by farmers. Seven treatments were repeated three times: [...] Read more.
Controlling organic and mineral fertilisation is a major concern in tropical environments. An experiment was conducted on an arenosol in the Dakar region, the main market gardening area of Senegal, to evaluate treatments commonly used by farmers. Seven treatments were repeated three times: A mineral fertilisation (MF) treatment based on N-P2O5-K2O (10-10-20), and three organic treatments at two doses (dried sewage sludge (SS), poultry litter (PL) and a digestate from an anaerobic digestion (AD) of cow manures). Each of the organic treatments were supplemented with a normal dose (1) and a double dose (2) of mineral N and K fertiliser. A lettuce, carrot and tomato rotation was grown in four campaigns (2016–2020) on all of the plots. Yields of all three crops in all of the organic treatments were statistically similar (p > 0.05) to the MF in all four campaigns, except for the yield of the lettuce crop under treatment PL-2 in campaigns 2 and 3. The tomato yields were statistically similar under all of the organic treatments in all four campaigns. In contrast, the yields of the lettuce and carrot crops differed statistically from each other and under the different organic treatments in all four campaigns. The yields of all three crops differed in the campaigns with the fertilisation treatment. In each campaign, the yields of each crop were not correlated with the total amounts of N, P and K applied. These differences or similarities in yields are explained by the nature of the organic waste products, the accumulation of nutrients after several applications, the type of crop and interannual differences in temperature. Full article
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