Work

Using bio-based fertilizer derived from peri‑urban wastes affects soil properties and lettuce yield and quality

Year: 2023

Type: article

Abstract: The use of waste-derived fertilisers also known as bio-based fertilisers (BBFs) for the production of ready-to-eat vegetables can efficiently contribute to sustainability and circularity. However, intensive studies about the efficiency and safety of these fertilisers are required. Thus, this study aimed to characterize and examine the effects of combined BBFs on lettuce yield, quality and on soil quality in a trial conducted under open field conditions. The experimental treatments included a combination of green waste compost with either human urine or food waste digestate or synthetic fertiliser; food waste compost with either human urine or food waste digestate or synthetic fertiliser; manure and synthetic fertiliser; synthetic fertiliser alone and control treatment without any application. The results showed statistically similar fresh lettuce yield after 48 days among treatments, all larger than in the control treatment. The highest yield (73 t ha-1) was observed with the combination of manure and synthethic fertiliser treatment. Yield with treatments that received green waste or food waste composts tended to slightly decrease, more likely due to the nitrogen immobilization after the application of uncompletely stabilised composts. Nitrate contents in fresh leaves of lettuces were below the EU limits (3000 ppm) in all the treatments. Research of pathogens and trace elements present in the aboveground lettuce showed no significant risk. The application of BBFs also appeared to maintain the soil pH as compared to synthetic fertiliser treatments. The important nutrient and carbon contents of BBFs, their positive effect on lettuce yield associated with their unharmful impact on lettuce quality suggest they can be used for vegetable production and increase the soil carbon stocks and contribute to city sustainability.

Source: Scientia Horticulturae

DOI: 10.1016/j.scienta.2023.112599

Authors: Lelenda Florent Kebalo, Patricia Garnier, Laure Vieublé Gonod, Sabine Houot

Institution: Écologie Fonctionnelle et Écotoxicologie des Agroécosystèmes

Language: English

Topic: Composting and Vermicomposting Techniques

Subfield: Soil Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDGs: Zero hunger, Responsible consumption and production

Open Access status: hybrid

Estimated APC paid: $3,430