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The Effects Of Exogenous Enzyme Supplementation On The Performance, Bone Quality, And Nutrient Utilization Of Broiler Chickens, Megan Bauer
Theses and Dissertations--Animal and Food Sciences
Two experiments were conducted to examine the effects of Allzyme® Spectrum supplementation to a reduced nutrient diet on the growth performance, energy and nutrient digestibility and utilization, bone quality, and jejunal digesta viscosity in broiler chickens. Each experiment used 300 one-day old Cobb by-product breeder chicks with 5 treatments, 10 replicates, and 6 birds per replicate cage in a randomized complete block design. The only differences between the two experiments were experiment 1 lasted for 21 days using a corn-soybean meal-based diet and experiment 2 lasted for 22 days using a wheat-soybean meal-based diet. The 5 treatments included a positive …
Recent Findings On Phosphorus Digestibility Of Feed Ingredients In Broilers, Jay Hampton, Wenting Li, Franco Mussini, Katie Hilton, Janet Remus, Samuel J. Rochell
Recent Findings On Phosphorus Digestibility Of Feed Ingredients In Broilers, Jay Hampton, Wenting Li, Franco Mussini, Katie Hilton, Janet Remus, Samuel J. Rochell
Proceedings of the Arkansas Nutrition Conference
Accurately meeting the dietary P needs of broilers is critical to ensure optimal bird performance, health, and welfare without causing undue environmental burdens associated with excess dietary P excretion. Phosphorus is commonly supplied in broiler diets from inorganic phosphates derived from non-renewable sources, but it has been estimated that peak P production will occur between 2030-2040 and that the global supply of P could be depleted within this century (Cordell and Drangert, 2009; Nest and Cordell, 2012). To address these concerns, inorganic P use in agriculture, including use in broiler diet formulation, requires careful stewardship. To this end, the dietary …
Amino Acids Were Not All Created Equal, Peter H. Selle, Shemil P. Macelline, Peter V. Chrystal, Sonia Y. Liu
Amino Acids Were Not All Created Equal, Peter H. Selle, Shemil P. Macelline, Peter V. Chrystal, Sonia Y. Liu
Proceedings of the Arkansas Nutrition Conference
The contention that amino acids were not all created equal is based on the simple premise that intestinal uptakes of non-bound (synthetic, crystalline, feed-grade) amino acids are more rapid than their protein-bound counterparts. The post-enteral ramifications of this difference in bioequivalence are amplified in broiler chickens given their express growth rates and just one complication is the post-prandial oxidation of amino acids. The lack of bioequivalence between non-bound and protein-bound amino acids is a real obstacle to the development and adoption of reduced-crude protein diets that have the potential to promote sustainable chicken-meat production Thus, the purpose of this paper …
A Comparative Study Of The Effects Of Microalgae On Poultry Production, Taylor Kaitlyn O'Lear Reid
A Comparative Study Of The Effects Of Microalgae On Poultry Production, Taylor Kaitlyn O'Lear Reid
Master's Theses
Research has shown Spirulina to be a viable feedstuff in poultry production. Other species of microalgae are being studied to determine their effects on poultry production. This project compared four microalgaes: Hydrodictyon, Vaucheria, Uronema, and Spirulina and was broken down into three trials. The first experiment investigated the digestibility of an algae species, Spirulina, in broiler chicken diets. Eighty, 25-day-old Ross 708 broiler chicks were sorted into 20 metabolism cages and received one of two diets: Control Diet or Test Diet (75% basal diet + 25% Spirulina). The apparent ileal amino acid digestibility (AIAAD) of lysine, methionine, cysteine, threonine, isoleucine, …
Effects Of Dietary Amino Acid Density And Exogenous Protease Inclusion On Growth Performance And Apparent Ileal Aa Digestibility In Broilers, Haley K. Wecker, Courtney N. Truelock, Christopher J. Delfelder, Caitlin E. Evans, Renan A. Donadelli, Charles G. Aldrich, Miguel A. Barrios, Charles R. Stark, Robert S. Beyer, John M. Gonzalez, Chad B. Paulk
Effects Of Dietary Amino Acid Density And Exogenous Protease Inclusion On Growth Performance And Apparent Ileal Aa Digestibility In Broilers, Haley K. Wecker, Courtney N. Truelock, Christopher J. Delfelder, Caitlin E. Evans, Renan A. Donadelli, Charles G. Aldrich, Miguel A. Barrios, Charles R. Stark, Robert S. Beyer, John M. Gonzalez, Chad B. Paulk
Kansas Agricultural Experiment Station Research Reports
Protein is one of the most expensive nutrients in poultry diets. In an effort to minimize feed costs, protein digestion and utilization by the animal must be carried out as efficiently as possible. Therefore, the objective of this study was to evaluate the effects of dietary AA density and exogenous protease inclusion on growth performance and AA digestibility in broilers. Treatments consisted of a 2 × 4 factorial design with main effects of commercial protease (with or without) and digestible Lys (1.12, 1.15, 1.18, or 1.21%). Broiler chicks were housed in 4 Petersime batteries and treatments were randomly assigned to …
Coccidiosis Vaccination And Nutrient Utilization In Broiler Chickens, Alyson Elaine Gautier
Coccidiosis Vaccination And Nutrient Utilization In Broiler Chickens, Alyson Elaine Gautier
Graduate Theses and Dissertations
Four experiments were conducted to evaluate the interrelationships among coccidiosis vaccination and nutrient utilization in floor-reared broiler chickens. Experiment 1 longitudinally compared the effects of coccidiosis vaccination and a chemical coccidiostat on broiler performance, nutrient digestibility, and intestinal morphology. Coccidiosis vaccination had no significant impact on morphology, overall body weight gain and feed intake of vaccinated birds, although vaccination impaired overall FCR. Vaccination elicited a transient reduction in digestibility of energy and nutrients, particularly for lipids, but vaccinated birds were able to recover from these reductions by 20 d. Experiment 2 assessed the impact of vaccination in digestibility of different …
Phytogenic Feed Additives As An Alternative To Antibiotic Growth Promoters In Broiler Chickens, G. R. Murugesan, Basharat Syed, Sudipto Haldar, Chasity Pender
Phytogenic Feed Additives As An Alternative To Antibiotic Growth Promoters In Broiler Chickens, G. R. Murugesan, Basharat Syed, Sudipto Haldar, Chasity Pender
G. R. Murugesan
The recent trend toward reduction of antibiotic growth promoters (AGP) in North American poultry diets has put tremendous pressure on the industry to look for viable alternatives. In this context, phytogenic feed additives (PFA) are researched to improve gut health and thereby performance. An experiment was conducted with the objective to evaluate the effects of PFA as an alternative to AGP on small intestinal histomorphology, cecal microbiota composition, nutrient digestibility, and growth performance in broiler chickens. A total of 432, day-old Vencobb 400 broiler chicks were randomly assigned to one of three dietary groups, each consisting of 12 replicate pens …