UMR 6553 EcoBio, IFR CAREN, Université Rennes 1/CNRS, Station Biologique, 35380 Paimpont, France.
Bioresour Technol. 2011 Feb;102(4):3679-86. doi: 10.1016/j.biortech.2010.11.027. Epub 2010 Nov 12.
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 NH(3), N(2)O, CH(4) and CO(2) 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.
液态粪肥的处理会导致氨、氧化亚氮和甲烷的产生。蚯蚓在不消耗额外能量的情况下混合和转化氮和碳。本文的目的是分析蚯蚓在猪粪的蚯蚓过滤过程中是否会改变 NH(3)、N(2)O、CH(4)和 CO(2)的排放。该实验使用了约 50 升的中观系统，由一个处理猪舍稀释粪肥的蚯蚓过滤器制成。在一个月的时间里，在三个重复实验中，向中观系统中添加了三个水平的粪肥，有无蚯蚓。分别测量了三次和五次蚯蚓丰度和气体排放。在有蚯蚓的处理中，氨和氧化亚氮的排放量减少，甲烷被吸收。我们认为，蚯蚓丰度可以用作新鲜粪肥与水再循环系统中低能量输入、低温室气体和低氨排放的生物指标。
