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

2007 ◽  
Vol 86 (1) ◽  
pp. 87-93 ◽  
Author(s):  
H.F. Schøyen ◽  
H. Hetland ◽  
K. Rouvinen-Watt ◽  
A. Skrede
Keyword(s):  
Amino Acid ◽  
Natural Gas ◽  
Growth Performance ◽  
Broiler Chickens ◽  
Bacterial Protein

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

2003 ◽  
Vol 83 (2) ◽  
pp. 229-237 ◽  
Author(s):  
A. Skrede ◽  
H. Faaland Schøyen ◽  
B. Svihus ◽  
T. Storebakken
Keyword(s):  
Natural Gas ◽  
Growth Performance ◽  
Soybean Meal ◽  
Broiler Chickens ◽  
Sensory Quality ◽  
Bacterial Protein ◽  
Growth Responses ◽  
Protein Meal ◽  
Protein Levels ◽  
Meal Protein

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. Key words: Bacterial protein meal, chicken, growth performance, feed:gain ratio, feed conversion, sensory quality

Impact of combined α-galactosidase and xylanase enzymes on growth performance, nutrients digestibility, chyme viscosity, and enzymes activity of broilers fed corn-soybean diets

2021 ◽  
Author(s):  
Xingbo Liu ◽  
Kun Xing ◽  
Ran Ning ◽  
Sergi Carné ◽  
Xingqiang Wu ◽  
...  
Keyword(s):  
Amino Acid ◽  
Growth Performance ◽  
Broiler Chickens ◽  
Average Daily Gain ◽  
Metabolizable Energy ◽  
Enzymes Activity ◽  
Enzyme Supplementation ◽  
Digesta Viscosity ◽  
Nutrients Digestibility ◽  
Endogenous Enzymes

Abstract Two experiments were conducted to investigate the effects of a combined α-galactosidase and xylanase preparation on nutrients digestibility and growth performance in broiler chickens. Experiment 1 had 240 broilers allocated to 3 treatments with the dietary supplementation of 0, 300 and 500 g/t of the enzyme combination. Diet and amino acid (AA) digestibility were assessed. Experiment 2 was a 2 × 3 (enzyme × diet) factorial arrangement with 10 replicates of 12 male broilers per replicate. Diets were based on corn-Soybean meal (SBM) diet and had 3 nutritional levels (normal, 2% apparent metabolizable energy (AME) and crude protein (CP) reduction, and 4% AME and CP reduction). Each of these diets was fed with or without enzyme supplementation. Growth performance, chyme viscosity, nutrients digestibility, and endogenous enzymes activity were assessed. In experiment 1, enzyme supplementation improved the digestibility of Ca (P = 0.025) and ileal digestibility of total AA, Pro, Alu, Ile, Lys, His, Thr, Glu, Val, Leu, Tyr and Phe (P < 0.05), and also tended to increase the AME of diets (P < 0.10). In experiment 2, broilers fed the corn-SBM diet with 4% nutrient reduction had better growth performance (P < 0.05), jejunal digesta viscosity at 42 days (P < 0.01), and lower digestibility of gross energy (GE) (P < 0.05) when compared to those fed the normal nutrient diet. Enzyme inclusion increased digestibility of CP (P = 0.044), GE (P = 0.009), raffinose (P < 0.001) and stachyose (P < 0.001), improved average daily gain (P = 0.031), and reduced jejunal digesta viscosity at 42 days (P = 0.011). Besides, similar improvements trend in amylase, trypsin, sucrase, and maltase activity with enzyme inclusion were observed as with energy. These data support that the enzyme supplementation increased nutrients and ileal amino acid digestibility, improved performance and endogenous enzymes activity.

Effects of autolysis and hydrolysis of bacterial protein meal grown on natural gas on chemical characterization and amino acid digestibility

Aquaculture ◽  
2005 ◽  
Vol 248 (1-4) ◽  
pp. 27-33 ◽  
Author(s):  
Hilde Faaland Schøyen ◽  
Janna Randi Kringeland Frøyland ◽  
Stefan Sahlström ◽  
Svein Halvor Knutsen ◽  
Anders Skrede
Keyword(s):  
Amino Acid ◽  
Natural Gas ◽  
Chemical Characterization ◽  
Bacterial Protein ◽  
Protein Meal ◽  
Hydrolysis Of

scholarly journals Graded L-methionine dietary inclusions influence growth performance and apparent ileal amino acid digestibility coefficients and disappearance rates in broiler chickens

2021 ◽  
Author(s):  
Shemil P. Macelline ◽  
Peter V. Chrystal ◽  
Leon R. McQuade ◽  
Bernard V. Mclnerney ◽  
Yangsu Kim ◽  
...  
Keyword(s):  
Amino Acid ◽  
Growth Performance ◽  
Broiler Chickens

scholarly journals Impacts of increasing challenge with Eimeria maxima on the growth performance and gene expression of biomarkers associated with intestinal integrity and nutrient transporters

2021 ◽  
Vol 52 (1) ◽  
Author(s):  
Po-Yun Teng ◽  
Janghan Choi ◽  
Yuguo Tompkins ◽  
Hyun Lillehoj ◽  
Woo Kim
Keyword(s):  
Gene Expression ◽  
Amino Acid ◽  
Tight Junction ◽  
Growth Performance ◽  
Broiler Chickens ◽  
Nutrient Transporters ◽  
Tight Junction Proteins ◽  
Intestinal Integrity ◽  
Eimeria Maxima ◽  
Junction Proteins

AbstractThis study was conducted to investigate the impacts of graded severity of Eimeria maxima infection on the growth performance and intestine health of broiler chickens. Four different levels of E. maxima-challenged treatments were used, including a non-challenged control group, a low challenge (12 500 oocysts), a medium challenge (25 000 oocysts), and a high challenge dose (50 000 oocysts). There were eight replicate cages per treatment, with 12 birds in each cage, and chickens in the challenged groups orally received sporulated oocysts on day 14. Gastrointestinal permeability was measured by fluorescein isothiocyanate dextran at 5 days post-infection (dpi), whereas intestinal morphology and gene expression of nutrient transporters and tight junction proteins were determined at 6 dpi. The results demonstrate a linear reduction in growth performance, jejunal villus height, and jejunal integrity with graded challenge doses of E. maxima (P < 0.01). Moreover, linear regulation of nutrient transporters and tight junction proteins was a consequence of increasing Eimeria infection levels (P < 0.01). The linear increase of Claudin 1, cationic amino acid transporter, glucose transporter 1, and L-type amino acid transporter genes was associated with increased severity of coccidiosis (P < 0.01). Furthermore, expression of nutrient transporters located at the brush border membrane were down-regulated (P < 0.01) with increasing E. maxima inoculation dose. In conclusion, growth performance and key intestinal integrity biomarkers in broiler chickens were adversely influenced in a dose-dependent manner by E. maxima infection.

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