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Effects of dietary copper and amino acid density on growth performance, apparent metabolizable energy, and nutrient digestibility in Eimeria acervulina-challenged broilers
- Source :
- Poultry Science. 96:602-610
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- The objective of this experiment was to evaluate the influence of copper supplementation in diets varying in amino acid (AA) density on growth performance, apparent metabolizable energy (AMEn), apparent ileal nutrient digestibility (AID), and plasma carotenoids in broilers infected with Eimeria acervulina. Ross 308 male broilers (480 total) were housed in battery cages and allotted to 8 experimental treatments in a factorial arrangement of 2 dietary AA densities [1.00% (LAA) or 1.20% (HAA) digestible Lys], 2 supplemental copper concentrations (zero or 116 mg/kg), and 2 E. acervulina infection states (uninfected or infected). Essential AA ratios relative to digestible Lys were similar in both the LAA and HAA diets, and copper was provided by 200 mg/kg of tribasic copper chloride (58% copper). Chicks received experimental diets from 2 to 21 d post hatch and 6 replicate cages of 10 birds per cage were assigned to each treatment. Broilers were inoculated with zero or 6.3 × 105 sporulated E. acervulina oocysts at 15 d and blood and ileal digesta were collected at 21 days. From 2 to 15 d, body weight gain and G:F of broilers were improved (P 0.05) with increasing AA density, and an AA density × copper interaction was observed (P 0.05) for feed intake. Eimeria infection reduced (P 0.05) plasma carotenoids, growth performance, dietary AMEn, and AID of organic matter, nitrogen, and total AA. There were no interactive effects of dietary treatments with E. acervulina infection on broiler growth performance or dietary AMEn. An AA density × copper supplementation interaction was observed (P 0.05) for AID of total AA, whereby copper supplementation increased AID of total AA for birds fed the LAA diet and decreased AID of total AA for birds fed the HAA diet. In summary, E. acervulina-induced reductions in nutrient digestibility were dependent on dietary copper and AA status, but changes in digestibility had minimal impact on growth performance of broilers during the E. acervulina infection period.
- Subjects :
- Male
0301 basic medicine
chemistry.chemical_element
Eimeria
Random Allocation
03 medical and health sciences
Animal science
Blood plasma
medicine
Animals
Amen
Amino Acids
Carotenoid
Poultry Diseases
chemistry.chemical_classification
biology
Coccidiosis
0402 animal and dairy science
04 agricultural and veterinary sciences
General Medicine
biology.organism_classification
medicine.disease
Animal Feed
040201 dairy & animal science
Copper
Diet
Eimeria acervulina
030104 developmental biology
chemistry
Biochemistry
Dietary Supplements
Animal Nutritional Physiological Phenomena
Digestion
Animal Science and Zoology
medicine.symptom
Energy Metabolism
Chickens
Weight gain
Subjects
Details
- ISSN :
- 00325791
- Volume :
- 96
- Database :
- OpenAIRE
- Journal :
- Poultry Science
- Accession number :
- edsair.doi.dedup.....d4ee6cec445d188688221166d023d60e