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Articles 1 - 30 of 467
Full-Text Articles in Poultry or Avian Science
Differences In Local And Systemic Immune Responses To Primary And Secondary Immunizations With The Herpesvirus Of Turkeys (Hvt) Vaccine In Layer Pullets., Allie K. Bowerman, Jossie M. Santamaria, Chrysta N. Beck, Gisela F. Erf
Differences In Local And Systemic Immune Responses To Primary And Secondary Immunizations With The Herpesvirus Of Turkeys (Hvt) Vaccine In Layer Pullets., Allie K. Bowerman, Jossie M. Santamaria, Chrysta N. Beck, Gisela F. Erf
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
Marek’s disease, caused by a herpesvirus, is a major health issue in poultry production. In chickens, vaccination with live herpesvirus of turkeys (HVT) provides effective protection. Little is known about the immune responses to the HVT vaccine. In this study, the immune responses to primary (V1) or secondary (V2) intradermal (i.d.) HVT vaccinations were examined. V1 and V2 were i.d. injected into growing feather (GF) pulps of six 9-week-old and six 19-week-old Light-brown Leghorn (LBL) pullets, respectively. Growing feather pulps and blood were collected before (0 h) and periodically through 10 d or 28 d post pulp injection (p.i.), respectively, …
The Evaluation Of Broiler Lines Divergently Selected For Water Conversion Ratio Under Acute And Chronic Stress, Baileigh B. Cash, Sara K. Orlowski-Workman
The Evaluation Of Broiler Lines Divergently Selected For Water Conversion Ratio Under Acute And Chronic Stress, Baileigh B. Cash, Sara K. Orlowski-Workman
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
Water conversion ratio (WCR) in broiler production influences bird physiology, environment, and litter quality, and may provide potential solutions to environmental stressors. However, very little is known about how genetic selection for water conversion ratio can affect litter characteristics and performance parameters, specifically under heat stress conditions. This study evaluated the effects of genetic lines, environmental conditions, and time on litter and bird performance characteristics in high water conversion ratio (HWCR) and low water conversion ratio (LWCR) broilers. Live performance parameters, including body weight, water and feed intake, and litter samples, were collected from HWCR and LWCR broilers raised under …
Differences In Local And Systemic Immune Responses To Primary And Secondary Immunizations With The Herpesvirus Of Turkeys (Hvt) Vaccine In Layer Pullets., Allie K. Bowerman
Differences In Local And Systemic Immune Responses To Primary And Secondary Immunizations With The Herpesvirus Of Turkeys (Hvt) Vaccine In Layer Pullets., Allie K. Bowerman
Poultry Science Undergraduate Honors Theses
Marek's disease, caused by a herpesvirus, is a major issue in poultry production due to its high mortality rate. The herpesvirus of turkeys (HVT) vaccine has been used as a crucial measure to mitigate outbreaks of Marek's disease in poultry production; however, little is known about the immune response to the HVT vaccine. In this study, we examined how primary and secondary intradermal (i.d.) vaccination with the HVT vaccine in the growing feather (GF) pulp affects local and systemic immune responses, including cellular, antibody, and cytokine responses. Six 9-week-old and six 19-week-old Light-brown Leghorn (LBL) pullets received a primary or …
The Evaluation Of Broiler Lines Divergently Selected For Water Conversion Ratio Under Acute And Chronic Stress, Baileigh B. Cash
The Evaluation Of Broiler Lines Divergently Selected For Water Conversion Ratio Under Acute And Chronic Stress, Baileigh B. Cash
Poultry Science Undergraduate Honors Theses
The importance of water conversion ratio in broiler production influences not only bird physiology but also barn environment, litter quality, and provides potential solutions to environmental stressors. However, very little is known about how genetic selection for water conversion ratio can affect litter characteristics and performance parameters, specifically under heat stress conditions. This study evaluates the effects of genetic lines, environmental conditions, and time, on litter and bird performance characteristics in high water conversion ratio (HWCR) and low water conversion ratio (LWCR) broilers. Litter samples were collected from HWCR and LWCR broilers raised under heat-stress and thermal-neutral conditions, both before …
Effect Of 1,25(Oh)₂D₃ Glycoside Supplementation Duration On Bacterial Chondronecrosis With Osteomyelitis (Bco) Lameness In Broilers, Zoe R. Zeman
Animal Science Undergraduate Honors Theses
Bacterial chondronecrosis with osteomyelitis (BCO) is a significant cause of lameness in commercial broilers, resulting in substantial animal welfare concerns and economic losses. This study evaluated the effect of 1,25(OH)₂D₃ glycoside supplementation duration on the incidence of BCO-related lameness in broilers. Cobb surplus male broiler chicks were assigned to four treatment groups: a wire-flooring positive control, a litter-flooring negative control, and two treatment groups on litter flooring receiving 1 μg 1,25(OH)₂D₃ as glycosides supplementation per kg diet for either 14 or 28 days. Lameness incidence was recorded from day 22 through day 56, and all lame birds were evaluated for …
Effects Of Cyclic Heat Stress On Blood Cell Profiles And Antibody Concentrations In Broilers Selected For Low Water Conversion Ratio, Luke B. Janski, Chrysta N. Beck, Jossie M. Santamaria, Gisela F. Erf
Effects Of Cyclic Heat Stress On Blood Cell Profiles And Antibody Concentrations In Broilers Selected For Low Water Conversion Ratio, Luke B. Janski, Chrysta N. Beck, Jossie M. Santamaria, Gisela F. Erf
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
Heat stress is a major environmental challenge in poultry production that reduces growth, welfare, and immune function. As global temperatures rise, understanding how genetic selection influences responses to heat stress (HS) is critical for sustainable production. Broilers selected for low water conversion ratio (LWCR) represent a potential strategy for improving resource efficiency; however, their immune response capabilities under HS remain unclear. This study evaluated the effects of cyclic HS on hematological parameters and immune function in LWCR and modern random-bred (MRB) broilers. Birds were reared under thermoneutral conditions (24 °C) or exposed to cyclic HS (36 °C for 8 h …
The Effects Of Heat Stress On White Blood Cell Profiles And Antibody Concentrations In Broilers Genetically Selected For Low Water Conversion Ratio Compared To The Modern Random Bred Broiler, Luke B. Janski
Poultry Science Undergraduate Honors Theses
Heat stress (HS) is one of the most significant environmental stressors impacting poultry production worldwide, reducing growth, feed efficiency, welfare, and immune competence. With global temperatures rising, understanding physiological and immunological adaptations to HS is essential for sustainable production. Broiler chickens selectively bred for low water conversion ratio (LWCR) have shown potential for reduced water consumption under environmental challenges; however, their immune resilience under HS conditions compared with modern random-bred (MRB) broilers remains unclear. This study investigated the effects of cyclic HS on red- (RBC) and white- (WBC) blood cells and humoral immunity in LWCR and MRB broilers. Birds were …
Environmental Enrichment Preferences And Play Behavior In Commercial Turkey Hens, Paul Dang
Environmental Enrichment Preferences And Play Behavior In Commercial Turkey Hens, Paul Dang
Poultry Science Undergraduate Honors Theses
Commercial turkey production contributes significantly to the U.S. agricultural industry, yet studies on positive welfare indicators, especially play behavior, are limited. This study evaluated turkey hen interactions with two environmental enrichments (straw bales and pecking stones hung from the ceiling) and the expression of play behavior in turkey barns. Three commercial turkey hen barns were equipped with environmental enrichments and time-lapse video cameras. Play behaviors were recorded during transect walks in two barns using 30-second scans of disturbed and undisturbed patches. Regional use of space around enrichments was quantified through region-of-interest (ROI) analysis of time-lapse images collected from days 16-31 …
Evaluation Of Limestones Varying In Calcium Solubility On Egg Production Performance And Total Tract Calcium Retention In Lohman Lsl Lite Laying Hens, R. L. Drysdale, P. L. Utterback, Benjamin Parsons, J E. Emmert, C. M. Parsons
Evaluation Of Limestones Varying In Calcium Solubility On Egg Production Performance And Total Tract Calcium Retention In Lohman Lsl Lite Laying Hens, R. L. Drysdale, P. L. Utterback, Benjamin Parsons, J E. Emmert, C. M. Parsons
Poultry Science Faculty Publications and Presentations
Limestone is one of the primary sources of Ca in poultry diets because it is often readily available and inexpensive. The amount and availability of Ca in limestone can vary due to factors such as the origin of the rock, particle size, and solubility. It is believed that larger particles that solubilize at moderate or slow rates may be advantageous by limiting Ca-phytate interactions and increasing retention time of particles in the gastrointestinal tract, which would lead to better utilization of Ca by the bird. There were 5 limestones evaluated with 2 dietary Ca levels fed per limestone (2.65 and …
Effect Of Heat Stress On Jejunal Epithelial Barrier Integrity In Broilers Divergently Selected For High- And Low-Water Efficiency, Elizabeth S. Greene, Sara Orlowski, Sami Dridi
Effect Of Heat Stress On Jejunal Epithelial Barrier Integrity In Broilers Divergently Selected For High- And Low-Water Efficiency, Elizabeth S. Greene, Sara Orlowski, Sami Dridi
Poultry Science Faculty Publications and Presentations
Drought and water scarcity, exacerbated by global warming, are enormous threats to global food sustainability and security. Poultry, in particular, are highly impacted by adverse environmental stressors. As nutrient absorption and intestinal integrity are critical for growth and performance, understanding the impact on the broiler gastrointestinal tract is highly relevant. Here, we examined the effect of chronic cyclic heat stress (HS) on the jejunal expression profile of tight-junction, gap-junction, adherens, and desmosome genes in the 4th generation of broiler lines divergently selected for low (LWE)- and high-water efficiency (HWE). Male HWE and LWE broilers (n = 240/line) were allotted to …
Differences In Cytokine Mrna Expression At The Site Of Primary And Secondary Vaccinations With Herpesvirus Of Turkeys (Hvt) In Egg-Type Chickens., Allie Bowerman
2026 Research Poster Competition
Marek’s disease, a lymphoma causing virus, remains a major concern in poultry production systems. Although vaccination with live herpesvirus of turkeys (HVT) is crucial for controlling this disease, information on how the vaccine drives local/tissue immune responses that lead to protective immunity is limited. Using the growing feather (GF) in vivo bioassay, we assessed local cytokine mRNA expression following primary and booster intradermal (i.d.) HVT vaccinations in egg-type chickens. For this, six 9-week-old and six 19-week-old Light-brown Leghorn (LBL) pullets were i.d. injected into the pulp of growing feathers (GF; 10 µL/GF; 16 GFs/bird) with a primary (V1) or secondary …
Management And Nutrition Factors That Impact Broiler Breeder Fertility, Jeanna Wilson
Management And Nutrition Factors That Impact Broiler Breeder Fertility, Jeanna Wilson
Proceedings of the Arkansas Nutrition Conference
This article addresses the recent decline in broiler breeder hatchability. Both managerial and nutritional solutions for mitigating the decline in hatchability are discussed.
Rethinking Macro And Micro Mineral Formulation In Modern Broilers, K. M. Venter, A. Herbst, P. W. Plumstead
Rethinking Macro And Micro Mineral Formulation In Modern Broilers, K. M. Venter, A. Herbst, P. W. Plumstead
Proceedings of the Arkansas Nutrition Conference
These proceedings discuss factors that affects calcium, phosphorus, zinc, and copper availability in poultry diets. Furthermore, the role of phytate and phytase on availability of the nutrients and their dietary requirements is investigated.
Renal And Gastrointestinal Disturbances That Cause Wet Manure And Litter In Poultry: Non-Nutritional And Nutritional Interventions To Prevent And Control The Issues, Fausto Solís
Proceedings of the Arkansas Nutrition Conference
These proceedings represent a broad overview of wet litter causes and management. Both the impact on bird health and fertilizer management are discussed. In addition to nutritional factors that impact litter quality, these proceedings address poultry health from disease implications of wet litter.
A Practical Approach To Sustainability In The Poultry Industry, Franco Mussini
A Practical Approach To Sustainability In The Poultry Industry, Franco Mussini
Proceedings of the Arkansas Nutrition Conference
This work highlights poultry industry advances in production, nutrition, and processing with less environmental impact. Specific sections address exogenous enzyme application on mineral nutrition and protein and feed-grade amino acid nutrition. Finally, conclusions on precision feeding opportunities in the broiler industry and meat production comparison with other animal production industries are discussed.
Engineering Broiler Efficiency Through Modern Infrastructure Design And Precision Control, Chris Travers
Engineering Broiler Efficiency Through Modern Infrastructure Design And Precision Control, Chris Travers
Proceedings of the Arkansas Nutrition Conference
These proceedings describe a modern, innovative broiler site in South Africa constructed with the following objectives in mind: Scale, Energy Efficiency, Precision Environmental Control with AI Integration, and Off-Grid Power Autonomy.
Does Phytase Change How We Feed Breeders?, Wenting Li
Does Phytase Change How We Feed Breeders?, Wenting Li
Proceedings of the Arkansas Nutrition Conference
Dietary evaluation of the use of exogenous phytase has received considerable attention in broilers, but not broiler breeders. Moreover, the limited studies that have assessed phytase in broiler breeders are dated, which makes interpretation problematic because dated phytase enzymes are not as efficacious as current phytase enzymes. The article addressed practical applications for dietary phytase in broiler breeder diets.
Current State Of U.S. Soybean Industry, Gordon Denny
Current State Of U.S. Soybean Industry, Gordon Denny
Proceedings of the Arkansas Nutrition Conference
This presentation highlights the current state of U.S. soybean production and the subsequent industrial manufacturing of oil and soybean meal. The former has been quoted as being in “the midst of the most dramatic and significant changes in history.” Reasons for the former are discussed.
Precision Broiler Nutrition: Bioeconomic Optimization Of Broiler Feeds With A Focus On Balanced Protein (Bp) And Metabolizable Energy (Me), Shivaram K. Rao, Rocky Latham, Phillip Smith, Hunter Walters, Malea Frank, Alejandro Corzo
Precision Broiler Nutrition: Bioeconomic Optimization Of Broiler Feeds With A Focus On Balanced Protein (Bp) And Metabolizable Energy (Me), Shivaram K. Rao, Rocky Latham, Phillip Smith, Hunter Walters, Malea Frank, Alejandro Corzo
Proceedings of the Arkansas Nutrition Conference
Key broiler performance indicators in live performance and yields are impacted by precision nutrition, and more specifically balanced protein and energy. These proceedings deal with bioeconomic optimization of broiler performance using profit scenarios like income over feed costs.
Soybean Meal Quality: Key Quality Control Parameters And Current Recommended Thresholds For In Vitro Assessments, Benjamin Parsons
Soybean Meal Quality: Key Quality Control Parameters And Current Recommended Thresholds For In Vitro Assessments, Benjamin Parsons
Proceedings of the Arkansas Nutrition Conference
These proceedings review the anti-nutritional factors of soybean meal and its resultant quality. Numerous in vitro assays are discussed herein. Recommendations from data on the most robust assays to assess both under and overprocessing of soybean meal are discussed.
Γ-Aminobutyric Acid Improves Gut-Brain Axis Function And Behavioral Adaptation In Broilers Under Low-Protein Diet, Randi Randi, Anisa Aulia, Muhtadin Muhtadin, Chusnul Hanim, Michael Kidd, Al Anas Muhsin
Γ-Aminobutyric Acid Improves Gut-Brain Axis Function And Behavioral Adaptation In Broilers Under Low-Protein Diet, Randi Randi, Anisa Aulia, Muhtadin Muhtadin, Chusnul Hanim, Michael Kidd, Al Anas Muhsin
Poultry Science Faculty Publications and Presentations
Low crude protein (CP) diets can improve feed efficiency and reduce ammonia emissions, but negative impacts on broiler productivity can occur. This study aimed to evaluate the effects of gamma-aminobutyric acid (GABA) supplementation in low CP diets on productivity, enzyme activity, neuropeptidergic gene expression, and behavior of broilers. A total of 360 male Ross 308 broilers were used in a factorial design experiment with two CP levels (19.5 and 18.0%) and three GABA levels (0, 100, and 200 mg/kg). Dietary CP and GABA levels did not significantly affect broiler productivity (P>0.05). Reducing CP in the diet increased amylase and …
Incidence Of Bacterial Chondronecrosis With Osteomyelitis Lameness In Commercial Duck Flocks In Mojokerto, Indonesia, Andi Asnayanti, Siti Azizah, Anif Mukaromah Wati, Ahmad Ridwan, Ahmad Arman Dahlan, Dinda Rosalita, Anh Dang Trieu Do, Adnan Alrubaye
Incidence Of Bacterial Chondronecrosis With Osteomyelitis Lameness In Commercial Duck Flocks In Mojokerto, Indonesia, Andi Asnayanti, Siti Azizah, Anif Mukaromah Wati, Ahmad Ridwan, Ahmad Arman Dahlan, Dinda Rosalita, Anh Dang Trieu Do, Adnan Alrubaye
Poultry Science Faculty Publications and Presentations
Bacterial Chondronecrosis with Osteomyelitis (BCO) lameness is an infection of opportunistic bacteria in the structural skeletal bones impacting multiple animal species, particularly poultry species. BCO lameness results in significant financial losses to industrial poultry production and increases the risk of foodborne illnesses, posing a major threat to consumers' food safety. As BCO lameness is an inherent risk of fast body weight gain in poultry species, especially broiler chickens, abundant studies have been conducted in broilers and turkeys. Nevertheless, BCO lameness incidence in ducks remains elusive. Thus, this is the first survey investigating the prevalence of BCO lameness cases in ducks. …
Preliminary Investigation Of Cecal Microbiota In Experimental Broilers Reared Under The Aerosol Transmission Lameness Induction Model, Anh Dang Trieu Do, Khawla Alharbi, Ruvindu Perera, Andi Asnayanti, Adnan Alrubaye
Preliminary Investigation Of Cecal Microbiota In Experimental Broilers Reared Under The Aerosol Transmission Lameness Induction Model, Anh Dang Trieu Do, Khawla Alharbi, Ruvindu Perera, Andi Asnayanti, Adnan Alrubaye
Poultry Science Faculty Publications and Presentations
Bacterial chondronecrosis with osteomyelitis (BCO), and its associated lameness, is one of the most common and devastating issues the poultry industry constantly faces, both globally and domestically. Leveraging the currently accepted "leaky gut" model of pathogenesis, this study aims to evaluate the cecal community of broilers reared under the aerosol transmission BCO induction model. A trial involving 1320 Cobb 500 broilers was conducted using the same induction model for 56 d with the following treatments: (1) positive control (PC)-untreated birds on wire-flooring pens; (2) negative control (NC)-untreated birds on litter-flooring pens; (3) LOW-birds treated with probiotic Enterococcus faecium spray on …
Characterization Of Water Intake And Water Conversion Ratio For Male And Female Broilers From Four Commercial Broiler Lines Reared To Eight Weeks Of Age, J.Z. Hiltz, C.W. Maynard, T.W. Tabler, M.A. Maquesda, K.M. Shafer, K.B. Nelson, M.T. Kidd, N.B. Anthony, S.K. Orlowski-Workman
Characterization Of Water Intake And Water Conversion Ratio For Male And Female Broilers From Four Commercial Broiler Lines Reared To Eight Weeks Of Age, J.Z. Hiltz, C.W. Maynard, T.W. Tabler, M.A. Maquesda, K.M. Shafer, K.B. Nelson, M.T. Kidd, N.B. Anthony, S.K. Orlowski-Workman
Poultry Science Faculty Publications and Presentations
Increased interest and investigation into the sustainability of broiler production has led to a need for reliable and repeatable means to measure water intake and its conversion rate into salable meat. Therefore, a study was conducted to characterize the water intake and water conversion ratio (WCR) of male and female broilers from four modern broiler strains. Two of these lines represented fast growing broiler strains (FGB A and FGB B) targeting a small bird market and two represented high yielding broiler strains (HYB A and HYB B). Three replicates of 25 sexed broilers from each line were placed into 24 …
Dietary Perennial Ryegrass Improves Meat Quality: Insights Into The Gut-Muscle Axis In Geese, Zeshan Zulfiqar, Muhammad Arslan Asif, Khawla Alharbi, Han Yao, Xiaoyan Zhu, Zhichang Wang, Hao Sun, Yalei Cui, Boshuai Liu, Shucheng Huang, Yinghua Shi
Dietary Perennial Ryegrass Improves Meat Quality: Insights Into The Gut-Muscle Axis In Geese, Zeshan Zulfiqar, Muhammad Arslan Asif, Khawla Alharbi, Han Yao, Xiaoyan Zhu, Zhichang Wang, Hao Sun, Yalei Cui, Boshuai Liu, Shucheng Huang, Yinghua Shi
Poultry Science Faculty Publications and Presentations
The gut-muscle axis represents a key regulatory pathway linking intestinal microbiota to muscle development and meat quality, yet its mechanistic basis in geese remains unclear. This study investigated how dietary perennial ryegrass modulates meat quality through microbiota reshaping and AMPK/Akt-mTOR signaling. Geese were fed a commercial diet (CD) or a ryegrass feeding (GD) for 30 days. GD markedly improved breast muscle morphology, increasing fiber density and reducing cross-sectional area, while enhancing meat color, texture, protein conformation, and reducing cooking loss and shear force. Amino acid and fatty acid enrichment, together with elevated antioxidant activity in serum, ileum and muscle, further …
Effect Of Chronic Heat Stress On Duodenal Epithelial Barrier Integrity In Low- And High-Water-Efficient Broiler Chickens, Lulu Liu, Elizabeth S. Greene, Brooklee Roach, Sara Orlowski, Sami Dridi
Effect Of Chronic Heat Stress On Duodenal Epithelial Barrier Integrity In Low- And High-Water-Efficient Broiler Chickens, Lulu Liu, Elizabeth S. Greene, Brooklee Roach, Sara Orlowski, Sami Dridi
Poultry Science Faculty Publications and Presentations
Heat stress (HS) has long posed a significant challenge to the poultry industry due to its adverse effects, such as depressed feed intake, decreased growth performance, and increased water consumption. Water efficiency (WE, conversion of water intake into body weight gain), although often neglected, is a key economic and production trait that is significantly affected by HS. Recently, we selected two broiler lines for high WE (HWE) and low WE (LWE) and showed a differential hypothalamic expression of genes involved in water homeostasis regulation. As the gut also plays a significant role in water absorption, the present study aimed to …
Zn Glycine Mitigates The Lps-Induced Hepatic Injury And Inflammation Through Nrf2/Nfκb Signaling In Geese, Zeshan Zulfiqar, Muhammad Arslan Asif, Layla Al-Mitib, Khawla Alharbi, Tanzina Hossain, Han Yao, Xiaoyan Zhu, Zhichang Wang, Hao Sun, Yalei Cui, Yinghua Shi
Zn Glycine Mitigates The Lps-Induced Hepatic Injury And Inflammation Through Nrf2/Nfκb Signaling In Geese, Zeshan Zulfiqar, Muhammad Arslan Asif, Layla Al-Mitib, Khawla Alharbi, Tanzina Hossain, Han Yao, Xiaoyan Zhu, Zhichang Wang, Hao Sun, Yalei Cui, Yinghua Shi
Biological Sciences Faculty Publications and Presentations
Gram-negative bacteria like Escherichia coli have an outer membrane that contains lipopolysaccharide (LPS), which is a powerful inducer of systemic inflammation. It is often associated with gut dysbiosis, intestinal barrier dysfunction, and liver damage. Despite increasing recognition of the gut-liver axis as a critical mediator in systemic inflammation and hepatic pathology, the efficacy of nutritional strategies targeting this pathway remains inadequately defined. This study evaluated the protective effects of zinc glycine (Zn_Gly), a highly bioavailable organic zinc chelate, against LPS-induced gut barrier disruption and liver damage in meat geese. Zn_Gly supplementation @ 80mg/kg of diet significantly attenuated LPS-induced impairments in …
Recycling Waste Via Insect Agriculture: Frass Impacts On Soil And Plant Health, Helen C.S. Amorim, Amanda J. Ashworth, Thomas F. Ducey, Valerie B. Brewer-Gunsaulis, Gerson L. Drescher, Philip R. Owens, Alana H. Patterson, Giovanna De Blais, Iris Van Straaten
Recycling Waste Via Insect Agriculture: Frass Impacts On Soil And Plant Health, Helen C.S. Amorim, Amanda J. Ashworth, Thomas F. Ducey, Valerie B. Brewer-Gunsaulis, Gerson L. Drescher, Philip R. Owens, Alana H. Patterson, Giovanna De Blais, Iris Van Straaten
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Frass-the main by-product of insect rearing for animal feed-is emerging as a promising soil amendment and plant growth promoter. However, basic agronomic information is lacking and prevents frass' widespread use as a biofertilizer. This study assessed impacts of black soldier fly (Hermetia illucens L. [Diptera: Stratiomyidae]) frass on soil fertility, crop growth, and quality compared to poultry litter (PL). Irrigated and non-irrigated soybean (Glycine max L. Merr.) and non-irrigated switchgrass (Panicum virgatum L.) plots received either PL (5.6 Mg ha(-1)), low frass rate (LF; 5.6 Mg ha(-1)), high frass rate (HF; 11.2 Mg ha(-1)), besides the unamended control (CT). In …
Comparison Of Relative Calcium Bioavailability Based On Bone Ash And Apparent Ileal Ca Digestibility In Broiler Chickens, R. L. Drysdale, B. W. Parsons
Comparison Of Relative Calcium Bioavailability Based On Bone Ash And Apparent Ileal Ca Digestibility In Broiler Chickens, R. L. Drysdale, B. W. Parsons
Poultry Science Faculty Publications and Presentations
Two experiments were conducted to determine relative Ca bioavailability based on bone ash and apparent ileal digestibility (AID) of Ca in reagent-grade calcium carbonate (RCaCO3) and RCaCO3 + phytic acid in commercial broiler chickens. In Experiment 1, relative Ca bioavailability of RCaCO3 and RCaCO3 + phytic acid was determined in ad libitum-fed broiler chickens using the slope-ratio method. Dietary treatments were corn-soybean meal-based diets. Diet 1 was Ca-deficient (0.30 % Ca; 0.45 % non-phytate P), while diets 2 through 5 were the same as diet 1, except that 2 increasing levels of RCaCO3 or RCaCO3 + phytic acid were added …
Productive Energy, As Determined By Arkansas Net Energy, Predicts Broiler Processing Weights, Carcass Market Value, And Gross Profit, Diego A. Martinez, Nawin Suesuttajit, Cole Umberson, Craig N. Coon
Productive Energy, As Determined By Arkansas Net Energy, Predicts Broiler Processing Weights, Carcass Market Value, And Gross Profit, Diego A. Martinez, Nawin Suesuttajit, Cole Umberson, Craig N. Coon
Poultry Science Faculty Publications and Presentations
This study assessed the sensitivity of Productive Energy (PE) to breast meat production, feed efficiency, and broiler economics, developed models for processing traits and economics, and examined economics dynamics. The experimental design involved 96 pens, 12 per block and eight blocks, with each pen within block receiving one of 12 dietary treatments for one week. Treatment diets, varying in amino acid concentrations, starch, and energy densities, were control-fed. The weights of processing body parts and net energy for gain (NEg) were determined with Dual-Energy X-Ray Absorptiometry, and fed heat production, fasting heat production (FHP), and net energy for maintenance (NEm) …