Applied Animal Science最新文献

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Call for Submissions 征集意见书
IF 1.4
Applied Animal Science Pub Date : 2025-07-23 DOI: 10.1016/S2590-2865(25)00066-7
{"title":"Call for Submissions","authors":"","doi":"10.1016/S2590-2865(25)00066-7","DOIUrl":"10.1016/S2590-2865(25)00066-7","url":null,"abstract":"","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"41 4","pages":"Pages iv-vi"},"PeriodicalIF":1.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
"August" Cover “八月”封面
IF 1.4
Applied Animal Science Pub Date : 2025-07-23 DOI: 10.1016/S2590-2865(25)00062-X
{"title":"\"August\" Cover","authors":"","doi":"10.1016/S2590-2865(25)00062-X","DOIUrl":"10.1016/S2590-2865(25)00062-X","url":null,"abstract":"","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"41 4","pages":"Page OFC"},"PeriodicalIF":1.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Using wet distillers grains placed on the ground as a late-season protein supplement for grazing stocker steers and subsequent effects on finishing performance and carcass characteristics 将湿酒糟放在地上作为放牧牛的后期蛋白质补充及其对肥育性能和胴体特性的影响
IF 1.4
Applied Animal Science Pub Date : 2025-07-23 DOI: 10.15232/aas.2024-02573
Keith R. Harmoney , John R. Jaeger
{"title":"Using wet distillers grains placed on the ground as a late-season protein supplement for grazing stocker steers and subsequent effects on finishing performance and carcass characteristics","authors":"Keith R. Harmoney ,&nbsp;John R. Jaeger","doi":"10.15232/aas.2024-02573","DOIUrl":"10.15232/aas.2024-02573","url":null,"abstract":"<div><h3>Objective</h3><div>Stocker cattle gains on western Great Plains rangelands are characterized by lower gains during late summer compared with early summer, and thus may also limit rancher use of stocker cattle to diversify livestock classes as a drought mitigation strategy. Our objective was to measure and compare late-summer stocker cattle gains after feeding a protein supplement (on the ground or in a bunk) to a nonsupplemented control.</div></div><div><h3>Materials and Methods</h3><div>Eighty steers (initial BW ± SD = 267 ± 22 kg/head) were stocked on 8 pastures (10 steers/pasture) each year from May to October for 4 yr. Two replications of 4 treatments, including (1) wet distillers grains fed in a bunk, (2) wet distillers grains fed on the ground on standing vegetation, (3) a 1:1 mixture of milo: soybean meal fed in a bunk, and (4) a control treatment of no supplement, were compared during a late-summer stocker steer grazing trial. Supplements were fed 3 times per week to supply CP at 0.14 kg/d per steer during the last half (77 d) of the growing season, mid-July to early October. Steers were weighed in May, mid-July, and October on pasture, and at the end of a feedlot finishing phase.</div></div><div><h3>Results and Discussion</h3><div>During the last half of the grazing season in 2011 to 2014, animal daily gains were greater for supplemented groups compared with the nonsupplemented control group (0.77 to 0.81 kg/head per day vs. 0.70 kg/head per day, supplemented vs. nonsupplemented, respectively). Gains on pasture from supplemented groups, including the wet distillers group fed on the ground, were not different from each other. Animals not supplemented on pasture had similar gain during the finishing phase in the feedlot compared with animals supplemented on pasture (235.9 kg/head vs. 229.7 kg/head).</div></div><div><h3>Implications and Applications</h3><div>Late-season protein supplementation with wet distillers grains, even in small quantities, would benefit stocker cattle gain during most years in this region, whether the supplement is placed on the ground or in a bunk. Any residual amount of distillers supplement that may be remaining on the soil appears to be inconsequential to animal gain. Lack of protein supplement limits stocker animal gains during the late grazing season in western Great Plains rangelands.</div></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"41 4","pages":"Pages 319-328"},"PeriodicalIF":1.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Perspective and Commentary: Summary of the Special Issue on calf and stocker performance effects on feedlot performance and thoughts on future research 展望与评论:《犊牛和家畜生产性能对饲养场生产性能的影响》特刊综述及对未来研究的思考
IF 1.4
Applied Animal Science Pub Date : 2025-07-23 DOI: 10.15232/aas.2025-02716
Daniel Rivera , Paul Beck
{"title":"Perspective and Commentary: Summary of the Special Issue on calf and stocker performance effects on feedlot performance and thoughts on future research","authors":"Daniel Rivera ,&nbsp;Paul Beck","doi":"10.15232/aas.2025-02716","DOIUrl":"10.15232/aas.2025-02716","url":null,"abstract":"<div><h3>Purpose</h3><div>The objective of this article was to summarize information in 7 original research articles and 2 reviews submitted, reviewed, and accepted for this Special Issue on possible preweaning calf and stocker calf performance factors influencing subsequent feedlot performance. Additionally, thoughts regarding future directions for research are presented.</div></div><div><h3>Sources</h3><div>A call for papers was released in early 2024 for topics that evaluated the effects of postweaning management on subsequent feedlot performance in beef cattle. Seven original research articles and 2 reviews were submitted.</div></div><div><h3>Synthesis</h3><div>This Special Issue represents research findings and reviews of information to expand our understanding of factors in the preweaning and stocker phases that might influence subsequent feedlot performance. Information is presented in the Health, Nutrition, and Production and Management sections. The segmented nature of the beef industry leads to segmented areas of research focused on the individual cow-calf, stocker, and feedlot segments. Thus, there is a dearth of consistent information examining long-term effects of pre- and postweaning treatments and factors across the various segments, including feedlot performance and carcass characteristics.</div></div><div><h3>Conclusions and Applications</h3><div>Our goal for this Special Issue was to identify and address some of the knowledge gaps. As noted in the 2 reviews, data regarding long-term effects needs to be collected in a more standardized and consistent way among various research locations. Although the research findings submitted to this Special Issue add to our body of knowledge, there are still many other avenues to explore. However, given the complexity of a system-type approach to fully explore these questions, it is imperative that researchers and Extension personnel collaborate (across state and regional lines) to find ways to address these needs.</div></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"41 4","pages":"Pages 399-404"},"PeriodicalIF":1.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Invited Review: Effects of management on performance of stocker cattle and subsequent feedlot performance: A review within Applied Animal Science 特邀评论:管理对家畜生产性能和随后的饲养场生产性能的影响:应用动物科学综述
IF 1.4
Applied Animal Science Pub Date : 2025-07-23 DOI: 10.15232/aas.2024-02663
M.A. Snider , M.S. Gadberry , J.D. Rivera
{"title":"Invited Review: Effects of management on performance of stocker cattle and subsequent feedlot performance: A review within Applied Animal Science","authors":"M.A. Snider ,&nbsp;M.S. Gadberry ,&nbsp;J.D. Rivera","doi":"10.15232/aas.2024-02663","DOIUrl":"10.15232/aas.2024-02663","url":null,"abstract":"<div><h3>Purpose</h3><div>The purpose of this review is to summarize relevant research from the journal <em>Applied Animal Science</em> (formerly known as <em>The Professional Animal Scientist</em>) between 1995 and 2024, that explores management practices and concepts as they relate to stocker calf performance and subsequent feedlot performance. A secondary objective of this review is to describe research trends and identify knowledge and research gaps within existing literature.</div></div><div><h3>Sources</h3><div>Sources for this article included peer-reviewed scientific literature obtained from the journal <em>Applied Animal Science</em>, formerly known as <em>The Professional Animal Scientist</em>. Literature used in this review included original research, short communications, technical notes, meta- analyses, and review articles between 1995 and 2024. A primary search excluded literature that were on species other than beef and dairy cattle. From there, a secondary search evaluated literature for inclusion if it contained the following key words: stocker, growing, grazing, yearling, grazing, backgrounding, cow-calf, feedlot(s), and finishing/finisher. Literature was excluded from this review if the study solely evaluated cow-calf or feedlot enterprises. Additionally, literature was excluded if there was not a stocker or grazing component to the study. Sources were further divided by the state or region in which the research was conducted to identify general production system locations and practices.</div></div><div><h3>Synthesis</h3><div>Stocker and feedlot phases of beef production systems are 2 crucial phases in the beef supply chain, with each phase serving distinct roles in the beef life cycle. Most weaned calves will go directly into stocker/backgrounding programs, thereby making stocker calf management critical. Stocker production management practices may vary based on numerous factors, such as climate, resource availability, and producer goals, potentially affecting subsequent feedlot performance.</div></div><div><h3>Conclusions and Applications</h3><div>Future research should focus on an all-encompassing systems approach, following calves from birth through the retail and marketing processes, and examine effects of health and technology integration.</div></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"41 4","pages":"Pages 329-349"},"PeriodicalIF":1.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of postweaning management of beef × dairy hybrid steers on performance, efficiency, and carcass characteristics 断奶后管理对牛×乳杂交阉牛生产性能、效率和胴体特性的影响
IF 1.4
Applied Animal Science Pub Date : 2025-07-23 DOI: 10.15232/aas.2024-02585
Ally Grote , Olivia Genther-Schroeder , Blake K. Wilson , Troy Wistuba , Paul Beck
{"title":"Effects of postweaning management of beef × dairy hybrid steers on performance, efficiency, and carcass characteristics","authors":"Ally Grote ,&nbsp;Olivia Genther-Schroeder ,&nbsp;Blake K. Wilson ,&nbsp;Troy Wistuba ,&nbsp;Paul Beck","doi":"10.15232/aas.2024-02585","DOIUrl":"10.15232/aas.2024-02585","url":null,"abstract":"<div><h3>Objective</h3><div>Our objective was to determine the per- formance, efficiency, and carcass quality in beef × dairy crossbred steers that were either placed directly on feed following weaning (FIN) or following an average stocker grazing period of 217 d (GRW/FIN).</div></div><div><h3>Materials and Methods</h3><div>Beef × dairy hybrid steers (n = 475) from Land O’Lakes Calf Milk Research Facility (Gray Summit, MO) at 12 wk of age were transported to the Willard Sparks Beef Research Center (WSBRC; Still- water, OK) in groups (n = 8) of 57 to 72 steers. Steers in the first group to arrive were allocated to either GRW/FIN or FIN treatment by BW, previous treatment, and breed of sire for each finishing treatment. Subsequent groups were all assigned either to FIN or GRW/FIN finishing treatments. Paired groups of FIN and GRW/FIN with overlapping feeding dates were considered a random block (n = 4) for statistical analysis. At WSBRC, steers were sorted by BW within sire breed and preweaning treatment into pens of 4 to 5 steers each and finished to a targeted 1.3 cm backfat. Data were analyzed using the Mixed pro- cedure of SAS 9.4 (SAS Institute Inc., Cary, NC), with pen within block as the experimental unit.</div></div><div><h3>Results and Discussion</h3><div>Steers in GRW/FIN had greater (<em>P</em> &lt; 0.01) BW and hot carcass weight while re- quiring fewer (<em>P</em> &lt; 0.01) days on feed compared with FIN steers but were 75 d older at harvest. Average daily gain and feed intake were greater but G:F was lesser (<em>P</em> &lt; 0.01) for GRW/FIN. Steers in GRW/FIN had a greater (<em>P</em> ≤ 0.03) ribeye area, marbling score, and percentage of USDA High Choice and Prime carcasses and fewer USDA Select carcasses (<em>P</em> &lt; 0.05) compared with FIN steers.</div></div><div><h3>Implications and Applications</h3><div>Grazing beef × dairy crossbred steers before finishing increased animal performance and improved carcass characteristics but also increased daily feed intake compared with calves placed directly on feed. Beef × dairy crossbred calves offer a viable alternative to straight-bred dairy calves, but it is necessary to determine proper management strategies for these calves.</div></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"41 4","pages":"Pages 350-362"},"PeriodicalIF":1.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of beef calf health status during receiving on subsequent performance during stocker and finishing phases of production* 接收期牛肉犊牛健康状况对后期备畜和育肥期生产性能的影响*
IF 1.4
Applied Animal Science Pub Date : 2025-07-23 DOI: 10.15232/aas.2024-02576
Paul Beck , Matt R. Beck , Daniel Rivera , Beth Kegley , Gerald Horn
{"title":"Effects of beef calf health status during receiving on subsequent performance during stocker and finishing phases of production*","authors":"Paul Beck ,&nbsp;Matt R. Beck ,&nbsp;Daniel Rivera ,&nbsp;Beth Kegley ,&nbsp;Gerald Horn","doi":"10.15232/aas.2024-02576","DOIUrl":"10.15232/aas.2024-02576","url":null,"abstract":"<div><h3>Objective</h3><div>The objective of this analysis was to de- termine the effects of purchasing cattle as steers or bulls and bovine respiratory disease (BRD) treatment of stocker calves during receiving on performance during subsequent stages of production.</div></div><div><h3>Materials and Methods</h3><div>This post hoc analysis used mixed steer and bull calves with full health data records (n = 1,965) from 9 experiments, steer calves with receiv- ing health data and subsequent grazing performance data (n = 2,032) from 10 experiments, and steer calves with receiving health data with subsequent grazing and fin- ishing performance data (n = 423) from 2 experiments. Data were analyzed as random effects or generalized linear mixed models with experiment as the random effect in the R software.</div></div><div><h3>Results and Discussion</h3><div>Calves received as intact bulls (n = 1,064) were 2.41-, 2.25-, 2.68-, or 2.94-times more likely to have a first, second, third, and fourth treat- ment, respectively, than calves that were received as steers (n = 901). Bulls were also 1.16-times more likely to have chronic morbidity and 2.27-times more likely to have BRD mortality than steers. As the number of BRD treatments increased, ADG during receiving decreased. This carried over for reduced BW during turnout on pasture and at the end of grazing. When steers were followed through finishing, increased number of BRD treatments during the stocker receiving period reduced BW at slaughter, hot car- cass weight, and marbling and increased the number of days on feed to achieve a calculated 28% empty body fat carcass (based on equations by Guiroy et al., 2001).</div></div><div><h3>Implications and Applications</h3><div>Bovine respiratory disease has long-term implications on performance, not only during the receiving period but also on BW and productivity following the stocker grazing phase and fin- ishing. We observed no compensatory gain on pasture or during finishing from reduced performance due to health issues in the receiving phase. Increased BRD morbidity and less favorable health outcomes for calves arriving as intact bulls would require at least a $0.50/kg discount for intact bulls for equivalent net returns to steers.</div></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"41 4","pages":"Pages 284-297"},"PeriodicalIF":1.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Plane of nutrition through 92 days of age in beef × dairy hybrid steers influences subsequent finishing performance, feed efficiency, and carcass characteristics 92日龄的牛乳杂交阉牛营养水平影响后期肥育性能、饲料效率和胴体特性
IF 1.4
Applied Animal Science Pub Date : 2025-07-23 DOI: 10.15232/aas.2024-02607
Ally Grote , Olivia Genther-Schroeder , Blake K. Wilson , Troy Wistuba , Paul Beck
{"title":"Plane of nutrition through 92 days of age in beef × dairy hybrid steers influences subsequent finishing performance, feed efficiency, and carcass characteristics","authors":"Ally Grote ,&nbsp;Olivia Genther-Schroeder ,&nbsp;Blake K. Wilson ,&nbsp;Troy Wistuba ,&nbsp;Paul Beck","doi":"10.15232/aas.2024-02607","DOIUrl":"10.15232/aas.2024-02607","url":null,"abstract":"<div><h3>Objective</h3><div>Our objective was to determine the effect of plane of nutrition through 92 d of age on subsequent finishing performance, feed efficiency, and carcass characteristics in beef × dairy crossbred steers.</div></div><div><h3>Materials and Methods</h3><div>Beef × dairy crossbred steers (n = 109) were acquired from commercial dairies in blocks (n = 2) with 38 and 72 steers per block and transported to the Calf Milk Research Facility at Purina Animal Nutrition in Grey Summit, Missouri, at 7 d of age. Steers were assigned to either a higher nutrient-dense milk replacer (MR) and starter (HI) or moderate nutrient- dense MR and starter (MOD) plane of nutrition through 92 d of age. Steers were weaned at 49 d and sorted into outdoor pens with 3 steers per pen. On d 84, steers were transported to the Willard Sparks Beef Research Center (WSBRC) in Stillwater, Oklahoma. At the WSBRC, steers were sorted by BW within preweaning treatment into 4 to 5 steers/pen and fed for 308 d. Data were analyzed using SAS 9.4 Mixed procedure (SAS Institute Inc., Cary, NC) for all performance and noncategorical carcass measures. For preweaning measurements, individual calf was used as the experimental unit, whereas for finishing phase measurements pen was the experimental unit.</div></div><div><h3>Results and Discussion</h3><div>Steers fed HI prefinishing exhibited a greater BW through d 168 of the finishing phase and had greater DMI from d 0 to 28 and d 28 to 112, as well as greater percentage USDA Choice. Steers fed MOD had a greater G:F from d 28 to 112 and had greater overall G:F. There were no other differences in carcass characteristics due to preweaning plane of nutrition.</div></div><div><h3>Implications and Applications</h3><div>Providing calves with lesser nutrient-dense diets during the preweaning period, such as MOD treatment of the current research, did not result in enhanced performance through compensatory gain. Based on this study, a higher preweaning plane of nutrition allows heavier BW through 29 wk of age and improved carcass quality.</div></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"41 4","pages":"Pages 307-318"},"PeriodicalIF":1.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of flexible prepartum supplementation strategies on cow-calf and subsequent progeny feedlot performance in a May-calving herd 灵活的预备饲料补充策略对5月产犊牛群犊牛及其后代饲育性能的影响
IF 1.4
Applied Animal Science Pub Date : 2025-07-23 DOI: 10.15232/aas.2024-02597
Jacki A. Musgrave , Kacie L. McCarthy , J. Travis Mulliniks
{"title":"Effects of flexible prepartum supplementation strategies on cow-calf and subsequent progeny feedlot performance in a May-calving herd","authors":"Jacki A. Musgrave ,&nbsp;Kacie L. McCarthy ,&nbsp;J. Travis Mulliniks","doi":"10.15232/aas.2024-02597","DOIUrl":"10.15232/aas.2024-02597","url":null,"abstract":"<div><h3>Objective</h3><div>The objective of this study was to evalu- ate the effects of minimal and flexible supplementation strategies on reproduction, cow BW, and subsequent calf performance in May-calving mature cows grazing upland native range.</div></div><div><h3>Materials and Methods</h3><div>Cows received one of 3 sup- plementation strategies: (1) 0.227 kg per day of a 30% CP distillers-based supplement (HalfSupp), (2) 0.454 kg per day of a 30% CP distillers-based supplement (Supp), or (3) brief and intermittent supplementation of Supp at 0.454 kg/cow based on periods of acute environmental stress, such as snow cover and wet winter events, which is best described as flexible supplementation (Flex). Supple- mentation was initiated in January each year and termi- nated approximately 30 d before the start of the calving season in April. After weaning, steers grazed subirrigated meadow with a dried distillers grain supplement until May. In May, all steers grazed subirrigated meadow with- out additional supplement until August/September when steers were shipped to the feedlot. Steers were placed in a GrowSafe feeding system for the rest of the finishing feeding period.</div></div><div><h3>Results and Discussion</h3><div>Cow BW was not different at the initiation of supplementation in January. However, cows fed HalfSupp had a lighter BW at precalving and tended to have a lighter BW at prebreeding than their counterparts. After a 45-d breeding season, pregnancy rates were not influenced by prepartum supplementation strategies. Prepartum supplementation strategies did not influence preweaning calf BW at birth, prebreeding, and weaning. In addition, steer backgrounding BW was also not influenced by their dam’s prepartum supplementation strategy. Upon entry into the feedlot, steer feedlot perfor- mance (BW, ADG, and feed efficiency) was not influenced by their dam’s prepartum supplementation strategy. After slaughter, no carcass characteristics were affected by the dam’s prepartum supplementation strategy.</div></div><div><h3>Implications and Applications</h3><div>Considering the cost of prepartum supplementation, feeding a protein supple- ment just during environmentally stressful periods during gestation appears to be a viable alternative to more conventional methods and reduces winter feed costs.</div></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"41 4","pages":"Pages 298-306"},"PeriodicalIF":1.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Extended effects of postweaning management in southeastern beef calves 东南地区肉牛断奶后管理的延伸效应
IF 1.4
Applied Animal Science Pub Date : 2025-07-23 DOI: 10.15232/aas.2024-02589
S. Maggie Justice , M. Kimberly Mullenix , Manuel F. Chamorro , D. Alex Tigue , S.L. Dillard , W.B. Smith , S.P. Rodning
{"title":"Extended effects of postweaning management in southeastern beef calves","authors":"S. Maggie Justice ,&nbsp;M. Kimberly Mullenix ,&nbsp;Manuel F. Chamorro ,&nbsp;D. Alex Tigue ,&nbsp;S.L. Dillard ,&nbsp;W.B. Smith ,&nbsp;S.P. Rodning","doi":"10.15232/aas.2024-02589","DOIUrl":"10.15232/aas.2024-02589","url":null,"abstract":"<div><h3>Objective</h3><div>Understanding the effects of postweaning management strategy on calf performance and health can help producers add value to their operations and further strengthen the viability of the beef supply chain. Our objective with this study was to evaluate the effects of weaning and postweaning management practices and potential carryover effects on calf immune system viability and performance through the feedyard finishing phase.</div></div><div><h3>Materials and Methods</h3><div>A 2-yr study was conducted using 429 steer calves from 3 Auburn University research farms. Calves were randomly assigned based on weaning weights to 1 of 3 different weaning method groups: fence-line weaning, nose-flap weaning, or abrupt weaning. After the weaning period (14 d), calves were brought to a centralized farm and began a 60-d backgrounding period where they were randomized according to previous weaning management, farm of origin, and BW to 1 of 3 nutritional management strategies in a 3 × 3 split-plot design: cool-season baleage and 1% BW dried distillers grain (DDGS), bermudagrass hay and 1% BW DDGS, or grazing of mixed warm-season annuals and 1% BW DDGS. Body weights were collected throughout the trial to measure growth and performance. Blood samples were collected throughout the backgrounding period to measure vaccination response. Following backgrounding calves were transported to a commercial feedyard and followed until finishing.</div></div><div><h3>Results and Discussion</h3><div>Fence-line-weaned calves had the greatest ADG (<em>P</em> = 0.02) in the first 30 d of the backgrounding period regardless of backgrounding diet type. Calves fed the bermudagrass-hay-based diet also had a greater ADG (<em>P</em> &lt; 0.0001) than both the grazing and baleage diet groups in the first 30 d of backgrounding. Steers on both the warm-season annual grazing and cool- season baleage diets supported greater ADG (<em>P</em> = 0.0041) during the last 30 d of the backgrounding period.</div></div><div><h3>Implications and Applications</h3><div>Results indicate that weaning and backgrounding management strategies may influence calf performance during the transition period into the postweaning phase and performance in the feedyard phase.</div></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"41 4","pages":"Pages 363-376"},"PeriodicalIF":1.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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