Effect of bacterial protein meal on protein and energy metabolism in growing chickens
Autor: | Anne-Helene Tauson, Anne Louise Frydendahl Hellwing, Anders Skrede |
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Rok vydání: | 2006 |
Předmět: |
Male
Time Factors Nitrogen Animal feed Protein metabolism Biology Weight Gain Feed conversion ratio Random Allocation chemistry.chemical_compound Bacterial Proteins Respiration medicine Animals Food science Chemical composition Meal Dose-Response Relationship Drug General Veterinary Proteins General Medicine Animal Feed Dose–response relationship chemistry Body Composition Animal Nutritional Physiological Phenomena Animal Science and Zoology medicine.symptom Energy Intake Energy Metabolism Chickens Weight gain |
Zdroj: | Archives of Animal Nutrition. 60:365-381 |
ISSN: | 1477-2817 1745-039X |
Popis: | This experiment investigates the effect of increasing the dietary content of bacterial protein meal (BPM) on the protein and energy metabolism, and carcass chemical composition of growing chickens. Seventy-two Ross male chickens were allocated to four diets, each in three replicates with 0% (D0), 2% (D2), 4% (D4), and 6% BPM (D6), BPM providing up to 20% of total dietary N. Five balance experiments were conducted when the chickens were 3-7, 10-14, 17-21, 23-27, and 30-34 days old. During the same periods, 22-h respiration experiments (indirect calorimetry) were performed with groups of 6 chickens (period 1), 5 chickens (period 2), and one chicken (periods 3-5). After each balance period, one chicken in each cage was killed and the carcass weight was recorded. Chemical analyses were performed on the carcasses from periods 1, 3, and 5. Weight gain, feed intake, and feed conversion rate were found to be similar for all diets. Chickens on D0 retained 1.59 g N x kg(-0.75) x d(-1), significantly more than chickens on D2, D4, and D6, which retained 1.44 g, 1.52 g, and 1.50 g N x kg(-0.75) x d(-1), respectively. This was probably caused by the higher nitrogen content of DO. Neither the HE (p = 0.92) nor the retention of energy (p = 0.88) were affected by diet. Carcass composition was similar between diets, in line with the values for protein and energy retention found in the balance and respiration experiments. It was concluded that the overall protein and energy metabolism as well as carcass composition were not influenced by a dietary content of up to 6% BPM corresponding to 20% of dietary N. |
Databáze: | OpenAIRE |
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