Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 30 for “"broiler performance"”.
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Broiler Performance and Intestinal Alterations When Fed Drug-Free Diets
… the effects of a drug-free feeding program on broiler performances. A total of 2,496 Cobb 500 chicks were randomly assigned to one of four dietary treatments with each group replicated 13 times. The four diets evaluated were: 1) negative control (NC): basal diet without growth promoter or …
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Effects of sprouted cowpea (vigna unguiculata) dietary inclusion with ronozyme ® ProAct supplementation on broiler performance
… ratio) and carcass parameters of Ross-308 broilers. Cowpeas were screened for viable seed and sterilised by 30-minute immersion in 2% sodium hypochlorite aqueous solution. Germinated by 12-hour soaking in tap water prior to 4-day open-air, 2-hourly irrigated sprouting on steel screens, and …
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CHARACTERIZATION OF PROTEIN SOURCES AND THEIR EFFECTS ON BROILER PERFORMANCE, DIGESTIVE TRACT MORPHOLOGY AND CAECAL FERMENTATION METABOLITES
… protein sources and evaluate their effects on broiler performance, digestive tract morphology and caecal fermentation. Understanding the digestion kinetics of high protein ingredients is an important step in elucidating the impact protein sources have on poultry performance and health. An in …
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Evaluating the Impact of an All-Vegetable Protein Supplement Containing Fat Emulsifiers and Probiotics on Broiler Performance
… a proprietary vegetable protein supplement on broiler growth, feed consumption and thus performance and carcass yields. This study also identifies a feed supplement that contains additional fat sources compared to a conventional diet, as well as including probiotics to increase feed efficiency. …
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The Impacts of Administering Metabolites of Saccharomyces cerevisiae on Broiler Performance, Yields and Salmonella Content of Component Portions
… poultry, and other species to improve animal performance and production volume output. In addition, Saccharomyces cerevisiae fermentation metabolites have also been shown in more recent research to reduce colonization of pathogenic bacteria in the host organism’s gastro-intestinal tract. In …
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Effect of Corn Quality and Enzyme Supplementation on Broiler Performance, Gastrointestinal Enzyme Activity, Nutrient Retention, Intestinal Mucin, and Jejunal Gene Expression
… enzyme of amylase, protease, and xylanase on broiler performance from 0 to 49 days of age. In each of the first two EXP, the four diets used consisted of (1) diet AR-/BR-; reduced dietary energy by increasing corn A matrix metabolizable energy (ME) 138 kcal/kg in EXP 1 or 125 kcal/kg ME with …
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A comparison of physical characteristics of pine shavings biosecure pine shavings and sunflower hulls as litter material and its influence on broiler performance
… physical characteristics and how this influenced broiler performance parameters. The physical characteristics examined included bulk density (BD), pH, water-holding capacity (WHC), litter caking, proximate laboratory analysis of the litter materials and propensity to litter beetle infestation. …
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Practical Strategies to Maximize Cockatiel Health and Broiler Chicken Performance
… therefore affecting the health and/or performance of the avian. The objective of the first study was to transition cockatiels (Nymphicus hollandicus) that were housed in a controlled experimental setting, with a standardized transition strategy, using two different commercially …
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Effects of dietary enzyme supplementation on performance, bone ash, small intestinal morphology, and apparent ileal amino acid digestibility of broilers exposed to a live coccidia oocyst vaccine
… the effects of dietary enzyme supplementation in broilers exposed to a live coccidia oocyst vaccine. In each experiment, Cobb 500 broilers were obtained at day of hatch from a commercial hatchery. Half of the chicks were sprayed with Coccivac BTM and housed in battery brooders in experiment (EXP) …
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The effects of stocking density and housing on feed efficiency and growth performance of broiler chickens
… contributor to the agricultural sector, with broiler production accounting for 80% of total broiler production within the Southern African Development Community. However, the industry faces challenges such as high input costs, particularly feed, and lack of domestically produced ingredients. …
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Reducing Dietary Crude Protein: Characterization of Branched-Chain Amino Acid Antagonism in Modern Broiler Chickens
<p>Reducing the crude protein content of broiler diets while maintaining performance has been a primary research area in nutrition. During the late 20th century, the bulk of this research has involved supplementing broiler diets with feed-grade amino acids and proving the economic benefits of their …
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Effects of Using Canola Meal as a Protein Source in Broiler Diets
… were conducted to evaluate the response of broilers fed canola meal. Experiment 1 assessed performance and carcass yields when broilers were fed various combinations of canola and soybean meal in nutritionally balanced diets based on digestible amino acid values. The results suggested that …
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EFFECT OF PROTEASE SUPPLEMENTATION IN BROILER FEED ON GROWTH PERFORMANCE, CARCASS YIELD AND TOTAL NITROGEN RETENTION IN FECAL MATTER AND LITTER
… of protease supplementation on commercial broiler performance, carcass yield, and nitrogen retention in fecal matter and litter. Total of 4,800 female (Ross 708) birds split into 96 floor pens, and randomly assigned to one of four treatment groups. Birds were placed within 96, 5’x10’ floor …
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Incubation temperature and post-hatch stress effects on immune parameters, immune system development, and performance in commercial broilers
Broiler performance is dependent on immunocompetency and the ability to respond to environmental challenges. Incubation temperature, post-hatch transportation, and vaccination may impose stress upon the embryo and post-hatch chick and impact immune system development and lifetime performance of the …
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The role of Dietary Interventions in Broiler Intestinal Health and Immunity
… of mannan-rich natural formulations on broiler tissue morphology, mucin barrier integrity, digestive enzyme capacity, apoptotic and necroptotic cell death levels and the expression of inflammatory cytokines. Supplementation of diet with each mannan-rich fraction (MRF) increased villus …
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The effects of Bacillus subtilis, dietary calcium and coccidial vaccines in broilers experiencing naturally occurring necrotic enteritis
… (NE) is a disease that negatively affects broiler performance and has increasingly become a problem with the reduced use of antibiotics. There is increased interest to utilize alternative methods including coccidial vaccines and direct fed microbials (DFM) to reduce or prevent NE. …
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Supplementation of chelated Zn Cu and Mn in broiler diets to improve performance skin integrity and the incidence and severity of footpad dermatitis
… chelates of Cu, Mn and Zn was investigated on broiler performance, carcass characteristics, skin and intestinal integrity and the prevalence of foot pad dermatitis. Two 35-day grow out trials were conducted in an environmentally controlled broiler facility. The purpose of the first trial was to …
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The Effects Of Different Amino Acid Concentrations, With Or Without Chromium Supplementation, On The Performance And Yield Of Commercial Broiler Chickens Fed Two Different Feeding Programs.
… <p>The objective of this study was to evaluate performance parameters and meat yield of commercial broiler chickens fed diets with different amino acid concentrations, with or without chromium supplementation, and delivered through two different feeding programs over 54 days. The experimental …
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Performance and Microbial Profiles of Broiler Chickens fed Phytogenic Feed Additives or Probiotics during Coccidiosis
… separate studies were performed to evaluate the performance and microbial profiles of commercial broilers fed either PFAs or Eimeria challenged broilers fed probiotics. During the probiotics study, 1056 day-old male Ross broiler chicks were assigned to one of 6 treatments, 8 replicates per …
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Effects of Nutritional Manipulation on Poultry under Normal and Stressful Conditions
Genetic selection for improved performance has necessitated the frequent update of amino acid requirements to support this improvement. The first objective of this dissertation was to investigate the tryptophan requirement of laying hens in peak production and the lysine and sulfur amino acid …
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