Growth Performance and Ileal and Total Tract Amino Acid Digestibility in Broiler Chickens Fed Diets Containing Bacterial Protein Produced on Natural Gas

Abstract

A total of 180 broiler chickens were fed 1 of 3 diets from day-old to slaughter at 35 d: a control diet with 35% soybean meal (SOY) or diets in which either 6% basic bacterial protein meal (BBP) or 6% autolysed bacterial protein meal (AUT) partially replaced soybean meal protein. Ileal and total tract apparent amino acid digestibility were examined in 5 chickens per diet using TiO(2) as an inert marker. Chickens fed the diets with bacterial protein had higher weight gain and feed consumption than control chicks during the first 3 wk, but there were no differences in growth or feed intake during the last 2 wk or during the total experimental period. The birds fed the BBP diet showed more efficient feed conversion compared with chickens fed the SOY and AUT diets. Litter quality at 5 wk was poorer in pens where the chickens were fed the AUT diet compared with the other 2 treatments. There were no differences among diets in the dressing percentage. Ileal amino acid digestibility at 5 wk of age revealed only minor differences between diets. There was a tendency toward lower ileal digestibility (0.12 > P > 0.07) of Arg, Lys, Met, and Phe in the AUT diet compared with the SOY diet, whereas there were no differences between the SOY and BBP diets. Total tract amino acid digestibilities at 5 wk were similar or slightly lower than the ileal digestibilities within diets. Total tract amino acid digestibility at 2 wk was similar to the total tract amino acid digestibility at 5 wk. The diets containing bacterial protein showed lower total tract digestibility of most amino acids compared with the SOY diet. It was concluded that 6% of either basic or autolysed bacterial protein can replace soybean meal in diets for broiler chickens without impairing growth performance, and the basic bacterial protein seemed to be a slightly better substitute than the autolysed bacterial protein.

Growth performance and carcase quality in broiler chickens fed on bacterial protein grown on natural gas

“…Previously, Skrede et al (2003) had reported lower abdominal fat pad content in broiler chickens fed 60 or 90 g/kg BPM at the expense of SBM, compared with chickens fed a control diet containing no BPM. Schøyen et al (2007b) found no effect on abdominal fat pad content in broiler chickens fed up to 60 g/kg BPM at the expense of fish meal, but did show a tendency towards lower levels of abdominal fat when SBM was replaced by BPM. Furthermore, Hellwing et al (2006) reported no effect of feeding up to 60 g/kg BPM at the expense of fish meal on carcase composition in chickens.…”

“…We found similar growth rate, reduced feed intake and improved FCE of birds fed increasing concentrations of BPM compared with the SBM control. Previous studies have shown that feeding BPM to broiler chickens results in similar or improved growth up to 60 g/ kg (Skrede et al, 2003;Schøyen et al, 2007b), but reduced growth rates at higher inclusion concentrations of 80 and 100 g/kg, when replacing SBM (Skrede et al, 2003). Significantly better FCE has also been obtained with increasing concentrations of up to 100 g/kg BPM (Skrede et al, 2003;Schøyen et al, 2007a).…”

“…In this process, the cell membranes are ruptured and so it was expected that chicken performance could benefit from processing of BPM into an autolysed product. Schøyen et al (2007b) reported similar amino acid digestibilities and growth rates in broiler chickens when fed on diets containing low concentration of BPM or BPA of 60 g/kg, but lower feed conversion ratio when feeding BPM compared to BPA. The effect of higher concentrations of BPA than 60 g/kg in diets for broiler chickens has not been investigated.…”

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).…”

Industrial Biotechnology: Date Palm Fruit Applications

“…As the dietary level of single-cell protein increases in broiler diet the gain, feed conversion and intake decreased (Jassim et al 1986;Pirmohammadi et al 1999). Schǿyen et al (2007) partially replaced soybean meal with basic bacterial protein (BBP) meal or autolyzed bacterial protein (AUT) meal. They concluded that 6% of either basic or autolyzed bacterial protein can replace soybean meal in diets for broiler chickens without impairing growth performance, and the basic bacterial protein seemed to be a slightly better substitute than the autolyzed protein.…”