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Chinese Consumers’ Attitudes Toward Animal Welfare: Behaviors, Beliefs, And Responses To Messaging, Jo Anderson Nov 2022

Chinese Consumers’ Attitudes Toward Animal Welfare: Behaviors, Beliefs, And Responses To Messaging, Jo Anderson

General - Animal Protection

Despite being comparatively neglected until recently, the suffering of animals in Asia is starting to command more attention from global animal advocacy activists. In particular, as the largest country in the world by both human and farmed animal population, and among the largest when measured by economy and land mass, China plays a central role here. However, the key question of how best to improve outcomes for farmed animals in China remains difficult to answer, due to the recency of the movement and a comparative lack of research on the topic.

Although China’s per capita meat consumption is lower than …


The Effect Of Corn Silage Hybrid And Inclusion On Performance Of Finishing Steers And Silage Hybrid Effects On Digestibility And Performance Of Growing Steers, F. Henry Hilscher, Curt J. Bittner, Jana L. Gramkow, Melissa L. Jollyy-Breithaupt, Mitch M. Norman, Hannah C. Wilson, Andrea K. Watson, James C. Macdonald, John N. Anderson, Galen E. Erickson Nov 2022

The Effect Of Corn Silage Hybrid And Inclusion On Performance Of Finishing Steers And Silage Hybrid Effects On Digestibility And Performance Of Growing Steers, F. Henry Hilscher, Curt J. Bittner, Jana L. Gramkow, Melissa L. Jollyy-Breithaupt, Mitch M. Norman, Hannah C. Wilson, Andrea K. Watson, James C. Macdonald, John N. Anderson, Galen E. Erickson

Department of Animal Science: Faculty Publications

Three experiments evaluated the effects of three corn silage hybrids, inclusion, and nutrient digestibility in growing and finishing diets. The three hybrids tested included a control (CON), a hybrid containing a brown midrib (bm3) trait (BM3), and an experimental bm3 hybrid with the soft endosperm trait (BM3-SOFT). Experiment 1 utilized 360 crossbred steers (body weight [BW] = 334; SD = 25 kg) to evaluate inclusion of silage in a finishing diet at (15% or 45% of diet dry matter [DM]) and silage hybrid (CON, BM3, or BM3-SOFT). Experiment 2 and 3 utilized 216 crossbred steers (BW = 324; SD = …


Examining How Ghana's Co-Management Policy Could Tackle Iuu Fishing In The Artisanal Fisheries Sector, Ambrose Yankee Oct 2022

Examining How Ghana's Co-Management Policy Could Tackle Iuu Fishing In The Artisanal Fisheries Sector, Ambrose Yankee

World Maritime University Dissertations

No abstract provided.


Addressing Illegal, Unreported, Unregulated (Iuu) Fishing In Cambodia : The Impact Of The Eu’S Iuu Regulation, Sorphea Sok Oct 2022

Addressing Illegal, Unreported, Unregulated (Iuu) Fishing In Cambodia : The Impact Of The Eu’S Iuu Regulation, Sorphea Sok

World Maritime University Dissertations

No abstract provided.


Prevalence Of Gastrointestinal Parasites In Lactating Kiko Does And Their Kids In Woodlands With Supplements, Bhuwan Shrestha, Uma Karki, Anand Tiwari, Santoshi Chaudhary, Lila Karki, Chukwuemeka Okere Oct 2022

Prevalence Of Gastrointestinal Parasites In Lactating Kiko Does And Their Kids In Woodlands With Supplements, Bhuwan Shrestha, Uma Karki, Anand Tiwari, Santoshi Chaudhary, Lila Karki, Chukwuemeka Okere

Professional Agricultural Workers Journal

Gastrointestinal (GI) parasites pose a major health concern in goats raised in pastures. The study objective was to evaluate GI parasites’ prevalence in lactating Kiko does and kids stocked in woodlands with supplemental grazing or feedstuffs. Seventeen lactating Kiko does, and their thirty-three kids were divided into two groups. Group 1 was supplemented with grazing in silvopastures and Group 2 with ad libitum hay and corn (0.5% of metabolic weight) along with stocking in woodland plots rotationally. Fecal samples were analyzed for type and quantity of GI parasites from animals having FAMACHA score 3 and higher. Group-1 does showed a …


Establishing A Small-Scale Pastured Poultry Operation In Kentucky, Frederick N. Bebe Oct 2022

Establishing A Small-Scale Pastured Poultry Operation In Kentucky, Frederick N. Bebe

Professional Agricultural Workers Journal

Pastured poultry is poultry rotationally raised on pasture, as opposed to large-scale confinement operations. There has been a growing demand for pastured poultry as a result of the adverse effects of the use of antibiotics in large-scale caged systems and pastured poultry’s attributable nutritional and economic benefits to consumers. As a result, an increasing number of small-scale farmers in Kentucky have begun raising birds both for personal consumption and for supplemental income, in conjunction with other farm enterprises. Poultry is the number one agricultural commodity in Kentucky. Thus, knowledge of how to establish small-scale pastured poultry operations as an alternate …


The Impact Of The Inclusion Of Grains In A Canine Diet On The Animal's Overall Health, Rachel Bruner Oct 2022

The Impact Of The Inclusion Of Grains In A Canine Diet On The Animal's Overall Health, Rachel Bruner

Honors Program: Senior Projects (Public)

The objective of this senior project was to examine the impacts that grains in a canine diet have on the overall health of the animal. Specifically, there was a focus on the nutritional attributes of grains, potential concerns regarding their inclusion in foods, misconceptions from consumers about grains in pet food, and alternatives to grains used in some diet formulations. The method of research for this project was a literature review. Scholarly articles focused on the various subtopics which helped to answer the research question were reviewed and included throughout the following discussion. Ultimately, the review of various literature resulted …


The Effects Of Administering Different Metaphylactic Antimicrobials On Growth Performance And Health Outcomes Of High-Risk, Newly Received Feedlot Steers, Carley M. Coppin, Taylor M. Smock, Cory L. Helmuth, Jeff L. Manahan, Nathan S. Long, Ashley A. Hoffman, Jeffery A. Carroll, Paul R. Broadway, Nicole C. Burdick Sanchez, James E. Wells, Samodha C. Fernando, Kristin E. Hales Oct 2022

The Effects Of Administering Different Metaphylactic Antimicrobials On Growth Performance And Health Outcomes Of High-Risk, Newly Received Feedlot Steers, Carley M. Coppin, Taylor M. Smock, Cory L. Helmuth, Jeff L. Manahan, Nathan S. Long, Ashley A. Hoffman, Jeffery A. Carroll, Paul R. Broadway, Nicole C. Burdick Sanchez, James E. Wells, Samodha C. Fernando, Kristin E. Hales

Department of Animal Science: Faculty Publications

Bovine respiratory disease (BRD) is the primary animal health concern facing feedlot producers. Many antimicrobial mitigation strategies are available, but few studies have compared feedlot performance during both the receiving and finishing periods following application of different antimicrobials used as metaphylaxis at arrival. The objective of this study was to compare antimicrobial metaphylaxis methods on clinical health and growth performance across both the receiving and finishing periods. A total of 238 multiple-sourced steers in two source blocks were used in a generalized complete block design. The four treatments included: 1) a negative control, 5 mL of sterile saline injected subcutaneously …


The Effect Of Infection Risk On Female Blood Transcriptomics, Brenna M. G. Gormally, Patricia C. Lopes Oct 2022

The Effect Of Infection Risk On Female Blood Transcriptomics, Brenna M. G. Gormally, Patricia C. Lopes

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

Defenses against pathogens can take on many forms. For instance, behavioral avoidance of diseased conspecifics is widely documented. Interactions with these infectious conspecifics can also, however, lead to physiological changes in uninfected animals, an effect that is much less well understood. These changes in behavior and physiology are particularly important to study in a reproductive context, where they can impact reproductive decisions and offspring quality. Here, we studied how an acute (3 h) exposure to an immune-challenged male affected female blood transcriptomics and behavior. We predicted that females paired with immune-challenged males would reduce eating and drinking behaviors (as avoidance …


Gsl Researcher (Fall 2022) Oct 2022

Gsl Researcher (Fall 2022)

GSL Researcher

GSL Researcher (Fall 2022)

Greetings

Students

Range and pasture update

Technical note

Ranch update

Highlighted research

GSL Open House agenda

GSL spotlight


The Relationship Between Performance, Body Composition, And Processing Yield In Broilers: A Systematic Review And Meta-Regression, Diego A. Martinez, Jordan T. Weil, Nawin Suesuttajit, Cole Alan Umberson, Abdullah Scott, Craig N. Coon Oct 2022

The Relationship Between Performance, Body Composition, And Processing Yield In Broilers: A Systematic Review And Meta-Regression, Diego A. Martinez, Jordan T. Weil, Nawin Suesuttajit, Cole Alan Umberson, Abdullah Scott, Craig N. Coon

Poultry Science Faculty Publications and Presentations

This study aims to model the relationship among performance, whole body composition, and processing yield through meta-regression. Scientific papers found in Scopus and Google Scholar were included if they reported results and variability values of an actual experiment in the three mentioned groups of variables using a single broiler genetic line. Weighted mean effect sizes were determined with a random model, the risk of bias was determined, and heterogeneity was considered an indicator of usefulness. Meta-regressions considered the effect sizes of the response variable and the percent change in one or more variables as predictors. A 78-row database was built …


The Role Of Frugivorous Birds As Seed Dispersers: Feeding Selection And Preference Of Madagascar’S Avian Frugivores In Analamazaotra Forest, Thaddeus Bashaw Oct 2022

The Role Of Frugivorous Birds As Seed Dispersers: Feeding Selection And Preference Of Madagascar’S Avian Frugivores In Analamazaotra Forest, Thaddeus Bashaw

Independent Study Project (ISP) Collection

Madagascar is a country rich in floral and faunal diversity. However, anthropogenic habitat destruction and climate change increasingly threaten its biodiversity. Endozoochorous plants that dependent on frugivory for seed dispersal are under threat due to increasing rates of localized extinctions of frugivorous lemurs, the primary seed dispersers of the island. While lemurs are the islands most abundant frugivores, other frugivorous vertebrates like birds and bats likely play a significant role in seed dispersal, although this role is still poorly understood. This study, conducted in Analamazaotra forest, compares the rates of visitation and consumption of six endemic fruiting tree species by …


Triazole Fungicide Prosaro Ec 250 - Induced Hematologicaland Biochemical Alterations In Male Rabbits (Oryctolagus Cuniculus), Debabsa Rafika, Khaldi Fadila, Grara Nedjoud, Bouzahouane Hana, Guezgouz Noureddine, Gheid Abdelhak Sep 2022

Triazole Fungicide Prosaro Ec 250 - Induced Hematologicaland Biochemical Alterations In Male Rabbits (Oryctolagus Cuniculus), Debabsa Rafika, Khaldi Fadila, Grara Nedjoud, Bouzahouane Hana, Guezgouz Noureddine, Gheid Abdelhak

Journal of Bioresource Management

The study aimed to evaluate the toxic effects of fungicide Prosaro 250 EC on hematological profiles and renal functional-biochemical markers, as well as blood glucose level .Twenty-four male rabbits were equally and randomly divided into control untreated group (G1) (n =6) received distilled water and standard food, and three treated groups (n=6 each) received by oral gavage Prosaro 250 EC at three doses (mg/kg body weight (bw)), 0.093 (G2), 0.186 (G3) and 0.465 mg/kg bw (G4) for 21 days .Results revealed a significant decrease in the kidney weight, and a significant increase in the levels of serum urea, uric acid, …


Effects Of Early‑Life Experience On Innovation And Problem‑Solving In Captive Coyotes, Andrew C. Garcia, Mitchell A. Parsons, Julie K. Young Sep 2022

Effects Of Early‑Life Experience On Innovation And Problem‑Solving In Captive Coyotes, Andrew C. Garcia, Mitchell A. Parsons, Julie K. Young

United States Department of Agriculture Wildlife Services: Staff Publications

Early-life experience often shapes behaviors like innovation and exploration. These behaviors are important to animals encountering novel food resources in diverse habitats, such as mesocarnivores in urban areas. To understand if early-life experiences impact later-life behavior, we examined how coyotes (Canis latrans) responded to a multi-access puzzle box at two life stages: pup (~ 7 weeks) and dispersal (~ 10 months). We first exposed pups, still living with their parents and littermates, to a baited puzzle box. At dispersal age, we again tested both these pups and an age-matched control group that was not exposed to the puzzle …


Ractopamine At The Center Of Decades-Long Scientific And Legal Disputes: A Lesson On Benefits, Safety Issues, And Conflicts, Kumail Abbas, Aqeel Raza, Ross D. Vasquez, Marri Jmelou M. Roldan, Nemi Malhotra, Jong-Chin Huang, Olivia Erin M. Buenafe, Kelvin H. -C Chen, Shin-Shin Liang, Chung-Der Hsiao Sep 2022

Ractopamine At The Center Of Decades-Long Scientific And Legal Disputes: A Lesson On Benefits, Safety Issues, And Conflicts, Kumail Abbas, Aqeel Raza, Ross D. Vasquez, Marri Jmelou M. Roldan, Nemi Malhotra, Jong-Chin Huang, Olivia Erin M. Buenafe, Kelvin H. -C Chen, Shin-Shin Liang, Chung-Der Hsiao

Chemistry Faculty Publications

Ractopamine (RAC) is a synthetic phenethanolamine, β–adrenergic agonist used as a feed additive to develop leanness and increase feed conversion efficiency in different farm animals. While RAC has been authorized as a feed additive for pigs and cattle in a limited number of countries, a great majority of jurisdictions, including the European Union (EU), China, Russia, and Taiwan, have banned its use on safety grounds. RAC has been under long scientific and political discussion as a controversial antibiotic as a feed additive. Here, we will present significant information on RAC regarding its application, detection methods, conflicts, and legal divisions that …


Broiler Vitamin Nutrition Guidelines, Nelson E. Ward Sep 2022

Broiler Vitamin Nutrition Guidelines, Nelson E. Ward

Proceedings of the Arkansas Nutrition Conference

In a time of record feed prices, nutritionists and production managers continue to look for opportunities to lower growout costs. Even though their contribution seldom exceeds 1-2% of feed costs, vitamins are not immune to this cost-crunching scrutiny. Furthermore, in late 2017, an unparalleled drop in global vitamin supply resulted in sharply increased prices, and in some cases, outright shortages. Such events have placed pressure on vitamin fortification levels in broiler feeds. Nutritionists decide on the fortification rates based on a variety of criteria – bird age, production phase, field experience, research trials, and so forth. The rapid change in …


Recent Findings On Phosphorus Digestibility Of Feed Ingredients In Broilers, Jay Hampton, Wenting Li, Franco Mussini, Katie Hilton, Janet Remus, Samuel J. Rochell Sep 2022

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 …


Reduction Of Protein Levels In Broiler Feed For Commercial Application – A German Case, Andreas Lemme, Kilian Fenske, Heiner Westendarp, Mathias Guhe, Elmar Rother Sep 2022

Reduction Of Protein Levels In Broiler Feed For Commercial Application – A German Case, Andreas Lemme, Kilian Fenske, Heiner Westendarp, Mathias Guhe, Elmar Rother

Proceedings of the Arkansas Nutrition Conference

A project was initiated to apply dietary CP reduction under commercial conditions. The main objective was to demonstrate and validate that dietary CP can be reduced without compromising broiler performance in a production system which is already rather efficient. In addition, we wanted to demonstrate the potential of dietary CP reduction on reducing N-excretions especially in the context of German revised regulations and monitoring attempts. Finally, as previous research suggested, few further aspects such as impact of dietary CP reduction on litter quality and quantity, footpad health, change of ingredient inclusion levels and related impact on sustainability impact factors were …


Application Of Simulation Modelling In Broiler Integration: Is It A Necessary Nutritional Tool?, Peter Chrystal Sep 2022

Application Of Simulation Modelling In Broiler Integration: Is It A Necessary Nutritional Tool?, Peter Chrystal

Proceedings of the Arkansas Nutrition Conference

Modelling techniques have been used in many industries globally to illustrate to others an understanding of the way processes work. Also, engineers and scientists employ models to predict the consequences of various courses of action. Simple pictorial models, such as the diagram of the chicken digestive system, are useful in education and may be more suitable than a photograph for the purposes of explaining how the animal converts ingested feed into components that can be assimilated, leaving residue that is excreted. Complex, predictive models seek to quantify a specified outcome based on defined inputs. Many attempts have been made over …


State Of The Art Pullet And Breeder Nutrition, Rick Van Emous Sep 2022

State Of The Art Pullet And Breeder Nutrition, Rick Van Emous

Proceedings of the Arkansas Nutrition Conference

During the last six to seven decades, broilers have been successfully selected for maximum growth and feed efficiency (Zuidhof et al., 2014). Modern fast-growing broilers reach a body weight of 2.0 to 2.5 kg in 35 to 45 days with an average daily growth of 55 or more gram a day (Augère-Granier, 2019). In a study with different broiler strains representative of broilers in 1957 or 1978 were compared with a broiler strain from 2005 (Zuidhof et al., 2014). The 2005 strain showed, over a 56-day growth period, a 4.6 times higher growth rate and a 50% lower feed conversion …


Broiler Breeder Males: Feed And Nutrition Discussion, Benton Hudson Sep 2022

Broiler Breeder Males: Feed And Nutrition Discussion, Benton Hudson

Proceedings of the Arkansas Nutrition Conference

The methods for feeding broiler breeder males have evolved over recent decades, and further revisions will likely be needed as males become more challenging to manage. Since the introduction of separate male feeding systems in the early 1980’s, breeder males’ nutrient needs have been better managed via daily feed restriction. If a breeder operation can effectively produce, haul, and store a separate male diet, then it provides more options to use different nutrient levels or feed additives that are designed to enhance fertility. This article will outline the history of male-separate feeding and revisit nutritional research on fertility of broiler …


Amino Acids Were Not All Created Equal, Peter H. Selle, Shemil P. Macelline, Peter V. Chrystal, Sonia Y. Liu Sep 2022

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 …


Recent Advancements On Calcium And Phosphorus Recommendations In Broilers, Justina Caldas, Marcelo Silva Sep 2022

Recent Advancements On Calcium And Phosphorus Recommendations In Broilers, Justina Caldas, Marcelo Silva

Proceedings of the Arkansas Nutrition Conference

Calcium and phosphorus have been recognized essential nutrients in chickens since 1950’s (Lesson & Summers, 2001) playing important roles in bone development, among other functions. Calcium is assumed an inexpensive nutrient in animal least cost formulation while phosphorus is considered expensive and scant. The actual economic impact comes from the influence of calcium on phosphorus requirements, changes in phosphorus digestibility, buffer capacity, gut health, trace mineral absorption, fat digestibility, welfare traits, etc. Both minerals have important interactions to be considered during formulation. Few changes have been made over the past 20 years to calcium and phosphorus recommendations because these values …


Decoding The Gut Microbiome; Providing Solutions For Poultry Production, Nichoals Evans, Peter Karnezos, Curtis Novak, Diana Ayala, Emily Kimminau, Kay Russo Sep 2022

Decoding The Gut Microbiome; Providing Solutions For Poultry Production, Nichoals Evans, Peter Karnezos, Curtis Novak, Diana Ayala, Emily Kimminau, Kay Russo

Proceedings of the Arkansas Nutrition Conference

The term “microbiome” refers to all the micro-organisms within a particular environment. In poultry, the microbiome is influenced by the barn, diet, and age of the birds and is believed to modulate immunity and inflammation. In the past, culture methods were primarily used to evaluate the presence of the various micro-organisms present in the microbiome; however, recent technological advances in genomic sequencing have revolutionized sample analysis. This technology has opened new avenues of research in poultry production and our understanding of the associated health challenges. Turkey cellulitis has been a major economic and health concern for many years. Traditional bacterial …


Application Of Nutritional Immunology In The Mitigation Of Economic And Production Losses In The Poultry Industry Associated With Food-Borne Pathogens, Coccidiosis, And Necrotic Enteritis., Shahna Fathima, Ramesh K. Selvaraj Sep 2022

Application Of Nutritional Immunology In The Mitigation Of Economic And Production Losses In The Poultry Industry Associated With Food-Borne Pathogens, Coccidiosis, And Necrotic Enteritis., Shahna Fathima, Ramesh K. Selvaraj

Proceedings of the Arkansas Nutrition Conference

Sub-therapeutic doses of antibiotics were used in poultry production since the 1950s for improved production, prophylaxis, and animal welfare. Extensive and indiscriminatory use of antibiotics led to the emergence of antibiotic resistance in food-borne pathogens of public health significance (Jones & Ricke, 2003). As per the United States Centre for Disease Control, more than 2.8 million infections in 2019 were caused by multidrug resistant bacteria. Due to public health concerns, the use of antibiotic growth promoters in livestock production was prohibited by Sweden and Denmark in 1986 and 1998 respectively (Hammerum et al., 2007). The European Union banned the use …


A Dynamic Approach To Feed Formulation, Rob Gous Sep 2022

A Dynamic Approach To Feed Formulation, Rob Gous

Proceedings of the Arkansas Nutrition Conference

The objective of this paper is to demonstrate that the opportunity cost of using fixed tables of nutrient requirements when formulating feeds for broilers can be considerable, and that nutritionists should consider a more dynamic approach to defining the lower bounds of amino acids in particular, in line with the objective of the business, which is to maximise profit. In order to do this, it is necessary to consider the potential growth rate of the broiler, the cost of feed and amount of feed consumed, and the income generated from the sale of product.


Transitioning To Net Energy: A Swine Story, John F. Patience Sep 2022

Transitioning To Net Energy: A Swine Story, John F. Patience

Proceedings of the Arkansas Nutrition Conference

Net energy (NE) is one member of the sequence of energy systems which also includes gross energy (GE), digestible energy (DE), and metabolizable energy (ME). It is perhaps the most sophisticated because it attempts to consider more components of the ingredient or diet which normally cannot be used by the pig for maintenance and/or productive purposes. Gross energy makes no such adjustment and therefore has little direct value in diet formulation. Digestible energy corrects for energy which is lost in the feces, and metabolizable energy also adjusts for energy lost in the urine. The data in Table …


Where Can We Go With Net Energy In Poultry?, Katie Hilton Sep 2022

Where Can We Go With Net Energy In Poultry?, Katie Hilton

Proceedings of the Arkansas Nutrition Conference

Metabolizable energy (ME) is the main system used globally in poultry industry for feed formulation and for evaluating feed ingredients and mixed feeds (de Boer and Bickel, 1988). ME is considered a reliable index of what is available to the bird for maintenance and production but is not a predictor of how efficiently the bird uses the available energy (MacLeod, 2000). The ME system developed by Hill and Anderson (1958) was reported to provide less variation in energy values for feed and ingredients than the Fraps PE system, but MacLeod (1994, 1997, 1999) suggest that the low variation …


Limestone Solubility: What Can You Do About It?, Wenting Li, Katie Hilton, Franco Mussini, Janet Remus Sep 2022

Limestone Solubility: What Can You Do About It?, Wenting Li, Katie Hilton, Franco Mussini, Janet Remus

Proceedings of the Arkansas Nutrition Conference

Calcium (Ca) is essential for bone development mineralisation, as well as for eggshell formation, muscle and neural functions. Depending on the type of diets (veggie vs. non-veggie), species (turkey, chicken, duck), and age of animal (young vs. adult), limestone can contribute up to 95% total Ca in the final diet, with more Ca from limestone for younger animals with veggie diet. Despite the significant contribution of limestone to total diet Ca levels, the bioavailability variation of limestone Ca is rarely considered. Phosphorus (P) is a limited resource and is the third most costly ingredient in poultry …


Evaluation Of The Effects Of Wood-Sourced Biochar As A Feedlot Pen Surface Amendment On Manure Nutrient Capture, Jessica L. Sperber, Galen E. Erickson, Andrea K. Watson Sep 2022

Evaluation Of The Effects Of Wood-Sourced Biochar As A Feedlot Pen Surface Amendment On Manure Nutrient Capture, Jessica L. Sperber, Galen E. Erickson, Andrea K. Watson

Department of Animal Science: Faculty Publications

Feedstuffs utilized in U.S. feedlot finishing rations incorporate high concentrations of N and P, with less than 15% of fed N and P retained by the animal. The remaining N and P are excreted in the manure, where the opportunity for manure N loss via ammonia (NH3) volatilization from the feedlot pen surface is a risk to the environment and lowers the value of manure as a fertilizer. Two nutrient mass balance experiments were conducted during the winter and summer seasons to evaluate the effects of spreading unprocessed Eastern red cedar biochar onto the feedlot pen surface on manure nutrient …