The effect of bacterial protein grown on natural gas on growth performance and sensory quality of broiler chickens

Abstract

Skrede, A., Faaland Schøyen, H., Svihus, B. and Storebakken, T. 2003. The effect of bacterial protein grown on natural gas on growth performance and sensory quality of broiler chickens. Can. J. Anim. Sci. 83: 229-237. Bacterial protein meal (BPM) produced from natural gas by Methylococcus capsulatus (Bath), Alcaligenes acidovorans, Bacillus brevis and Bacillus firmus was studied as a protein source for broiler chickens. Three experiments from day-old to slaughter at 35 d were carried out. In exp. 1, BPM was fed at 0, 20, 40, 60, 80 and 100 g kg -1 diet (as fed) replacing soybean meal protein. Levels of BPM up to 60 g kg -1 had no effect on 0-5 wk gain, while the 80 and 100 g kg -1 levels significantly reduced gain, especially in the 0-2 wk period. In exp. 2, chickens were fed diets containing 0, 30, 60 and 90 g kg -1 BPM and two protein levels, 23 and 21 g kg -1 . The highest level of BPM significantly reduced growth, independent of protein level, whereas growth responses to lower levels of BPM were similar to the control diet. In exp. 3, 90 g kg -1 BPM in diets containing 23 g kg -1 protein had no negative effect on growth, but significantly reduced the abdominal fat pad. Overall, substitution of soybean meal protein with increasing levels of BPM significantly lowered feed-to-gain ratio during the last part of the feeding period. Sensory analysis of thigh meat after 2 mo of frozen storage (exp. 1) showed that meat from 35-d-old chickens fed 60 and 100 g kg -1 BPM had less odor intensity and less rancid flavor than meat from control animals fed no BPM. Other sensory attributes were not affected by treatment. Pour cela, ils ont engraissé des oiseaux du premier jour à l'abattage, 35 jours plus tard, dans le cadre de trois expériences. Dans la première, ils ont remplacé le tourteau de soja par 0, 20, 40, 60, 80 ou 100 g de FPU par kilo d'aliment servi. Jusqu'à la concentration de 60 g, la FPU n'a aucune incidence sur le gain de poids pendant les 5 premières semaines, mais à celles de 80 et de 100 g, la FPU diminue sensiblement le gain de poids, surtout lors des deux premières semaines d'engraissement. Dans la deuxième expéri-ence, les oiseaux ont été nourris avec un aliment contenant 0, 30, 60 ou 90 g de FPU et 23 ou 21 g de protéines par kilo d'aliment. La concentration de FPU la plus élevée ralentit sensiblement le gain de poids, quelle que soit la teneur en protéines, mais les plus petites concentrations débouchent sur une réaction similaire à celle de la ration témoin. Dans la troisième expérience, la présence de 90 g de FPU par kilo dans un aliment contenant 23 g de protéines par kilo n'a pas eu d'effet négatif sur la croissance, mais a sensiblement réduit la couche de gras abdominal. Dans l'ensemble, la substitution du tourteau de soja par une quantité croissante de FPU atténue sensiblement le ratio entre la prise alimentaire et le gain de poids durant la dernière partie de la période d'engraissement. L'évaluation organoleptique de la viande du haut de cuisse après deux mois de congélation (expérience 1) indi...

Effects of growth substrate and partial removal of nucleic acids in the production of bacterial protein meal on amino acid profile and digestibility in mink

“…The final product is a reddish/ brownish meal, containing about, %: dry matter (DM) 96, crude protein (CP) 70, lipids 10 and ash 7. The BPM has been reported to have a nutritionally favourable amino acid composition (Skrede et al, 1998), and to be a suitable protein source for pigs (Øverland et al, 2001), broiler chickens (Skrede et al, 2003;Schøyen et al, 2007), mink (Ahlstrøm et al, 2006) and salmonid fish species (Aas et al, 2006).…”

Bacterial protein meal in diets for growing pigs: effects on protein and energy metabolism

“…Growth trials suggest that BPM may be a promising alternative protein source, but some varying and contradictory results have been observed (Øverland et al, 2001 andSkrede et al, 2003;Storebakken et al, 2004). Dietary BPM providing up to one-third of the N intake was found to sustain animal performance and health in slaughter chickens (Skrede et al, 2003) and blue foxes (Skrede and Ahlstrøm, 2002).…”

“…Dietary BPM providing up to one-third of the N intake was found to sustain animal performance and health in slaughter chickens (Skrede et al, 2003) and blue foxes (Skrede and Ahlstrøm, 2002). When BPM made up approximately 50% of dietary N, no adverse effects were reported for growing-finishing pigs (Øver-land et al, 2001) or Atlantic salmon (Storebakken et al, 2004).…”

“…Previous production experiments with BPM in diets for monogastric species (Øverland et al, 2001 andSkrede and Ahlstrøm, 2002;Skrede et al, 2003;Storebakken et al, 2004), and N and energy metabolism studies in mink and chickens (Hellwing et al, 2005 and2006), have given somewhat varying and contradictory results. Therefore, the objective of the present study was, by means of balance and respiration experiments, to reveal effects of replacement of SBM by BPM on N and energy metabolism in balanced diets for growing-finishing pigs.…”

Effects of mixtures containing different protein and fatlevels on growth and feed conversion ratio of common carp (Cyprinus carpio,L., 1758)

“…Prema Skrede et al (1998), brašno proizvedeno iz bakterijske biomase predstavlja komponentu koja je po aminokiselinskom sastavu najpribliţnija ribljem brašnu. Nutritivnu vrednost proteina iz brašna bakterija potvrdili su mnogi istraţivaĉi ispitujući ga na pastrmkama i drugim gajenim ţivotinjama (Skrede et al, 1998(Skrede et al, , 2003Storebakken et al, 1998Storebakken et al, , 1999Overland et al, 2001). Neka istraţivanja sugerišu da aminokiseline iz proteina jednoćelijskih organizama mogu biti problematiĉne zbog neuravnoteţenog odnosa i da se kao rezultat javlja manji prirast kod tilapije (Davies and Wareham, 1988).…”