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Earthworm effects on gaseous emissions during vermifiltration of pig fresh slurry |
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| Authors: | Luth Robin Paul Germain Philippe Lecomte Marcel Landrain Brigitte Li Yinsheng Cluzeau Daniel |
| Institution: | a UMR 6553 EcoBio, IFR CAREN, Université Rennes 1/CNRS, Station Biologique, 35380 Paimpont, France b INRA, Agrocampus-Ouest, UMR SAS, IFR CAREN, 65 rue de Saint-Brieuc, 35000 RENNES, France c Chambres d’Agriculture de Bretagne, Station Expérimentale de Guernévez, 29520 Saint-Goazec, France d Shanghai Jiao Tong University, Department of Environmental Science and Technology, School of Agriculture and Biology, 800# Dongchuan Road, Shanghai 201101, PR China |
| Abstract: | Treatment of liquid manure can result in the production of ammonia, nitrous oxide and methane. Earthworms mix and transform nitrogen and carbon without consuming additional energy. The objective of this paper is to analyse whether earthworms modify the emissions of NH3, N2O, CH4 and CO2 during vermifiltration of pig slurry.The experiment used mesocosms of around 50 L, made from a vermifilter treating the diluted manure of a swine house. Three levels of slurry were added to the mesocosms, with or without earthworms, during one month, in triplicate. Earthworm abundance and gas emissions were measured three and five times, respectively.There was a decrease in emissions of ammonia and nitrous oxide and a sink of methane in treatments with earthworms. We suggest that earthworm abundance can be used as a bioindicator of low energy input, and low greenhouse gas and ammonia output in systems using fresh slurry with water recycling. |
| Keywords: | Vermifiltration CO2 NH3 N2O CH4 |
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