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Microbial composition of poultry excreta
AbstractTotal microbial populations, bacteria, actinomycetes, fungi and algae of three samples of poultry excreta were studied. The physiological groups involved in C, N and S cycles have been determined. The results were compared with the common numbers in soils and organic wastes. Poultry excreta had a high density of micro-organisms. Bacteria, most of them being strict or facultative anaerobes, predominated. Actinomycetes and fungi were also in relatively high density. Fungi were mainly as propagules and their mycelium was nearly indetectable. Algae were in low density. A small percentage of aerobic bacteria was acidophilic or acid-tolerant, a lesser number was spore-forming, and cyanobacteria were not detected. Most of the microbial population had proteolytic, ammonificant, anaerobic cellulolytic, denitrificant and anaerobic nitrogen-fixing capacities, followed by amylolytics, pectolytics, sulphate reducers and anaerobic mineralizers of sulphur; whereas micro-organisms favoured by aerobic conditions as aerobic cellulolytic, aerobic free-living nitrogen fixers, ammonium oxidizers, nitrite oxidizers and sulphur oxidizers were in low densities, and sulphide oxidizers were not detected.
Microbial composition of poultry excreta
AbstractTotal microbial populations, bacteria, actinomycetes, fungi and algae of three samples of poultry excreta were studied. The physiological groups involved in C, N and S cycles have been determined. The results were compared with the common numbers in soils and organic wastes. Poultry excreta had a high density of micro-organisms. Bacteria, most of them being strict or facultative anaerobes, predominated. Actinomycetes and fungi were also in relatively high density. Fungi were mainly as propagules and their mycelium was nearly indetectable. Algae were in low density. A small percentage of aerobic bacteria was acidophilic or acid-tolerant, a lesser number was spore-forming, and cyanobacteria were not detected. Most of the microbial population had proteolytic, ammonificant, anaerobic cellulolytic, denitrificant and anaerobic nitrogen-fixing capacities, followed by amylolytics, pectolytics, sulphate reducers and anaerobic mineralizers of sulphur; whereas micro-organisms favoured by aerobic conditions as aerobic cellulolytic, aerobic free-living nitrogen fixers, ammonium oxidizers, nitrite oxidizers and sulphur oxidizers were in low densities, and sulphide oxidizers were not detected.
Microbial composition of poultry excreta
Nodar, R. (author) / Acea, M.J. (author) / Carballas, T. (author)
Biological Wastes ; 33 ; 95-105
1989-11-22
11 pages
Article (Journal)
Electronic Resource
English
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