Beneficial effects of manure on soil and crop yield have been largely demonstrated, because of its high organic matter content. Moreover, manure increased biological activity and diversity of soil microorganisms, which in turn can lead to minimize crop damage from soil borne pathogens. Reports on the success of application of manure in order to reduce root lesion nematodes in different crop systems are numerous. Moreover it is largely showed that the addiction of manure into soil lead to a gradual increase of opportunistic nematodes in response to an increase in microbial activity. However, there are few studies on characterization of nematode communities on well rotted cow manure and the majority of the studies are focused on vertebrates parasitic nematodes. We thus decided to study the nematode community of manure, excluding vertebrates parasitic nematodes, in order to give further information about the effect of the manure on nematode communities. Samples were collected from a well rotted cow manure used in a field trial. The mean number of nematodes/100 g of manure was 305. Only 5 genera were recorded, belonging to 3 families. Because of manure composition, only enriched-oportunistis and saprophytic nematodes were found. In fact, omnivores/saprophytic nematodes were the dominant trophic group (51.9%), and bacterial feeders nematodes were subdominant (47.8%). Fungal feeders were recorded in a very low percentage (0.3%) and plant feeders were not detected. The majority of bacterial feeders belonged to Rhabditidae, and Diplogasteridae was dominant between omnivores/saprophytic. The most abundant genera recorded was Diplogasteroides; on the contrary, Butlerius had the lowest percentage (0.1%). The genera composition was extremely reduced and therefore the biodiversity was low as confirmed by MI (1.00) and H’ (0.38). The data suggest that manure could affect nematofauna not only improving bacterial activity but also introducing nematode genera. That could have effects on the nematofauna biodiversity and soil quality and it could be strategic in managing soil extremely compromized or depleted. Further studies are necessary to assess the ability of nematodes from the manure to fit into new soil ecosystem.
|Titolo:||First investigation on nematofauna in well rotted manure|
|Data di pubblicazione:||2007|
|Parole Chiave:||manure, nematofauna, Butlerius|
|Settore Scientifico Disciplinare:||Settore AGR/11 - Entomologia Generale e Applicata|
Settore AGR/13 - Chimica Agraria
|Citazione:||First investigation on nematofauna in well rotted manure / ANNA CORSINI, VERONICA BRUINI, BARBARA MANACHINI, PATRIZIA ZACCHEO, LAURA CRIPPA. ((Intervento presentato al convegno 1st International Symposium on Nematodes as Environmental Bioindicators. tenutosi a Heriot-Watt University, Edinburgh, UK nel 12-13 June 2007.|
|Appare nelle tipologie:||14 - Intervento a convegno non pubblicato|