Short-term experiments in using digestate products as substitutes for mineral (N) fertilizer: Agronomic performance, odours, and ammonia emission impacts

The Science of the Total Environment
C RivaFabrizio Adani

Abstract

Anaerobic digestion produces a biologically stable and high-value fertilizer product, the digestate, which can be used as an alternative to mineral fertilizers on crops. However, misuse of digestate can lead to annoyance for the public (odours) and to environmental problems such as nitrate leaching and ammonia emissions into the air. Full field experimental data are needed to support the use of digestate in agriculture, promoting its correct management. In this work, short-term experiments were performed to substitute mineral N fertilizers (urea) with digestate and products derived from it to the crop silage maize. Digestate and the liquid fraction of digestate were applied to soil at pre-sowing and as topdressing fertilizers in comparison with urea, both by surface application and subsurface injection during the cropping seasons 2012 and 2013. After each fertilizer application, both odours and ammonia emissions were measured, giving data about digestate and derived products' impacts. The AD products could substitute for urea without reducing crop yields, apart from the surface application of AD-derived fertilizers. Digestate and derived products, because of high biological stability acquired during the AD, had greatly reduced ...Continue Reading

References

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Citations

Apr 14, 2018·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Valerio PaoliniAngelo Cecinato
Aug 23, 2018·Animal Science Journal = Nihon Chikusan Gakkaihō·Zhifei PanKazutaka Umetsu
Nov 20, 2020·The Science of the Total Environment·Wei PengPinjing He
Mar 29, 2020·Journal of Environmental Management·Julen UrraCarlos Garbisu
Apr 14, 2021·The Science of the Total Environment·Massimo ZilioFabrizio Adani
Mar 10, 2019·Journal of Environmental Management·Andreina LaeraEric D van Hullebusch
Nov 13, 2021·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Giovanni BeggioAlberto Pivato

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