Applied Animal Science最新文献

{"title":"Evaluating supplementation programs for growing calves grazing bermudagrass pastures","authors":"A.M. Womack ,&nbsp;PAS,&nbsp;E.B. Kegley ,&nbsp;PAS,&nbsp;Shane Gadberry ,&nbsp;PAS,&nbsp;T. Hess ,&nbsp;D. Hubbell ,&nbsp;P.A. Beck ,&nbsp;PAS","doi":"10.15232/aas.2023-02494","DOIUrl":"https://doi.org/10.15232/aas.2023-02494","url":null,"abstract":"<div><h3>Objective</h3><p>Our objective was to determine gain in response to hand-fed (HF) or self-fed (SF) summer supplementation programs at the University of Arkansas Livestock and Forestry Research Station, on twenty 0.81-ha common bermudagrass (<em>Cynodon dactylon</em> [L.] Pers.) pastures at a stocking rate of 6.17 calves/ha (BW ± SD = 247 ± 24.6) over 3 yr.</p></div><div><h3>Materials and Methods</h3><p>This experiment was designed in a 2 × 2 + 1 factorial arrangement of treatments including control (CON), with only free-choice mineral; HF, 1.13 kg/d byproduct-based supplement offered only late summer (LS) or all summer (AS); or SF tub supplement (PVM Cattle Tub, Positive Feed Ltd., Sealy, TX) either LS or AS. The HF supplement in yr 1 was a 50:50 blend of soybean hulls and corn gluten feed, in yr 2 an extruded dried distillers grains cube (MasterHand Milling, Lexington, NE) was used, and in yr 3 corn gluten feed was the HF supplement. Data were analyzed as a generalized randomized complete block design using the mixed procedure of SAS (SAS Institute Inc., Cary, NC). Fixed effects in the model included supplementation treatment, year, and year × treatment interaction.</p></div><div><h3>Results and Discussion</h3><p>Even though different HF supplements were used each year, there were no year × treatment interactions. Early summer ADG was greater for HFAS than CON and SFAS, whereas supplemental efficiency (kg added gain/kg supplement) in early summer was less for SFAS than HFAS. Late summer ADG was greater for HF treatments than SF treatments and CON, whereas SF did not differ among supplement treatments. Cost of added gain was $28.33 and $16.14/kg for SFAS and SFLS, respectively, compared with $3.32 and $1.68/ kg for HFAS and HFLS, respectively.</p></div><div><h3>Implications and Applications</h3><p>Calves on this experiment did not respond as expected to the SF supplement, likely because the bermudagrass pastures in this experiment averaged over 13% CP and were in excess of 10% even in the LS sampling periods. Depending on supplement delivery costs, the most cost-effective way to add gain with supplement to growing calves grazing bermudagrass pasture is by HF.</p></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 2","pages":"Pages 91-102"},"PeriodicalIF":1.5,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S259028652400017X/pdf?md5=e7001816153191a8ae626b8ebab6eca2&pid=1-s2.0-S259028652400017X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140296051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Perspective and Commentary: Effects of conversion of farmland to an integrated beef cattle grazing operation and water use in the Southern Plains and Ogallala Aquifer of the USA","authors":"Miles E. Theurer ,&nbsp;Jonathan Aguilar ,&nbsp;Rachael Clews ,&nbsp;J. Trent Fox ,&nbsp;Gina Gigot ,&nbsp;Marc Gigot ,&nbsp;Tom M. Jones ,&nbsp;Darrin McGraw ,&nbsp;Justin W. Waggoner","doi":"10.15232/aas.2023-02506","DOIUrl":"https://doi.org/10.15232/aas.2023-02506","url":null,"abstract":"<div><h3>Purpose</h3><p>The objectives were to quantify the amount of water savings by converting farmland to an integrated cattle grazing operation through farming practices and cattle requirements, quantify estimated water savings from Thunderstruck Farms over a 20-yr period in relationship to a nearby municipality, and evaluate cattle water intake in backgrounding and feedlot phases.</p></div><div><h3>Sources</h3><p>Thunderstruck Farms is located near Garden City, Kansas, which has 3,035 irrigated hectares with the primary water source coming from the Ogallala Aquifer. In 2018 Thunderstruck Farms entered all its irrigated land into a water conservation area (WCA) to conserve water resources, and all crops grown are used for silage, hay, or pasture to support the dairy and feedyard enterprises in the region. Historical water and nitrogen use from Thunderstruck Farms was evaluated from 2013 through 2022. Light-weight beef cattle (181–272 kg) graze these irrigated pastures (approximately 120 d). Following the grazing season, the cattle are finished at Hy-Plains Feedyard (Montezuma, KS).</p></div><div><h3>Synthesis</h3><p>Thunderstruck Farms is allocated 22.9 billion liters of water annually for stock water and irrigation purposes. Thunderstruck Farms used 50.8 billion liters less water than allocated, with 57.8% of the conservation occurring during the 5-yr period of the WCA. Average nitrogen administration has decreased 39% per year since entering into the WCA. During the same period, Thunderstruck Farms has produced 2.8 million kilograms of total weight gain of beef; beef cattle were then transferred to Hy-Plains Feedyard to finish. Based on the calculations from this research, the average amount of water saved over a 4-yr period by decreasing commodity resource use by grazing cattle would average 1.1 billion liters of water each year per 4,047 ha. On average, cattle consumed 17.94 L/ head per day while grazing. Peak monthly water use corresponded with average ambient temperature peak during the summer months.</p></div><div><h3>Conclusions and Applications</h3><p>Integrated grazing systems reduce the inputs required for cattle to reach a slaughter endpoint. They also may improve soil health. All of these practices result in more water availability for surrounding municipalities and allow for a thriving local economy.</p></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 2","pages":"Pages 199-204"},"PeriodicalIF":1.5,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000272/pdf?md5=e2b9dc99bcab33977a97e1532ee87608&pid=1-s2.0-S2590286524000272-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140295860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Classification of postpartum beef cows as estrous cycling or anestrous through the use of estrus detection patches prior to the start of the breeding season","authors":"E.G. Smith ,&nbsp;K.R. Ricardo ,&nbsp;G.M. VanWye ,&nbsp;L.J. Palcheff ,&nbsp;R.C. Bonacker ,&nbsp;C.M. Andersen ,&nbsp;J.M. Thomas","doi":"10.15232/aas.2023-02474","DOIUrl":"https://doi.org/10.15232/aas.2023-02474","url":null,"abstract":"<div><h3>Objective</h3><p>Two experiments were designed to evaluate use of estrus detection patches (Estrotect Breeding Indi- cators; Hermitage, TN) applied to postpartum cows 24 d before estrus synchronization as a diagnostic tool to clas- sify postpartum beef cows as estrous cycling or anestrous.</p></div><div><h3>Materials and Methods</h3><p>Estrous cyclicity was de- termined via blood samples (experiment 1) or transrectal ovarian ultrasonography (Experiment 2). In Experiment 1, blood samples were collected from 257 cows 10 d before, and coincident with the start of synchronization. Serum progesterone concentrations were determined via radioim- munoassay; cows were considered cycling if one or both samples exceeded 0.5 ng/mL.</p></div><div><h3>Results and Discussion</h3><p>Based on progesterone, 55% were cycling at the start of estrus synchronization. Use of activated patches to infer cyclicity resulted in 85% sensi- tivity and 79% specificity. However, 75% of cows presented with missing patches. If missing patches were considered activated, sensitivity was 96% but specificity was 16%, In Experiment 2, estrous cyclicity status was determined for 269 cows via transrectal ovarian ultrasonography coinci- dent with the start of estrus synchronization. Cows were classified as cycling based on the presence of a corpus lu- teum. Based on transrectal ovarian ultrasonography, 59% (161/269) were cycling at the start of estrus synchroniza- tion. Of cows receiving patches, 95% (256/269) retained patches for the full 24-d period. Use of activated patches to infer cyclicity resulted in 89% sensitivity and 68% speci- ficity in Experiment 2.</p></div><div><h3>Implications and Applications</h3><p>Estrus detection patches are a sensitive tool to classify postpartum cows as cycling before the start of the breeding season; however, patch retention could limit application for this purpose.</p></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 2","pages":"Pages 142-149"},"PeriodicalIF":1.5,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000223/pdf?md5=d5c8deeb0896a2c4b71d2f93c6c47044&pid=1-s2.0-S2590286524000223-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140295958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A cooperative study assessing the effects of a second iron injection administered before weaning on growth performance, hematological status, and tissue mineral concentrations of nursery pigs*","authors":"T.B. Chevalier ,&nbsp;O. Adeola ,&nbsp;S.D. Carter ,&nbsp;C.R. Dove ,&nbsp;M.J. Estienne ,&nbsp;C.L. Levesque ,&nbsp;C.V. Maxwell ,&nbsp;T. Tsai ,&nbsp;M.D. Lindemann","doi":"10.15232/aas.2023-02480","DOIUrl":"https://doi.org/10.15232/aas.2023-02480","url":null,"abstract":"<div><h3>Objective</h3><p>A study involving 7 experiment stations evaluated the effects of a second iron injection adminis- tered before weaning on growth and hematological mea- sures of pigs.</p></div><div><h3>Materials and Methods</h3><p>Pigs (n = 514) were given an iron injection (100–200 mg) on the first day of life. Piglets were then allotted to pairs of similar-weight, same- sex siblings 3 to 5 d before weaning (on d 18–24) with one piglet from each pair receiving a second iron injection. All pigs received common station-specific postweaning diets. Data were subjected to ANOVA with the model contain- ing the terms treatment, station, pair within station, and treatment × station interaction.</p></div><div><h3>Results and Discussion</h3><p>Postweaning ADG was greater for the added-injection group during during 0 to 14 d after weaning, but the response (212.5 vs. 202.6 g) was largely influenced by a single station as evidenced by a treatment × station interaction. The tendency for a treatment × station interaction for overall ADG (d −4 to 28) indicated that iron status was not the most limiting factor for growth at all stations. Hemoglobin concentra- tion was greater for the added-injection group at weaning and d 14 after weaning.</p></div><div><h3>Implications and Applications</h3><p>An additional iron injection before weaning may lead to improved early nursery growth; however, the beneficial effects of an additional iron injection are not universal and are likely dependent on unique herd characteristics including timing and total dosage of iron injections as well as nursery diet supple- mentation.</p></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 2","pages":"Pages 112-123"},"PeriodicalIF":1.5,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000193/pdf?md5=ec4536ff629a141b409a222f520c5920&pid=1-s2.0-S2590286524000193-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140296034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of short-term nutritional increase before artificial insemination on average daily gain and reproductive efficiency in March-calving beef heifer development systems","authors":"L.F. Tadich ,&nbsp;R.E.S. Rogers ,&nbsp;R.N. Funston","doi":"10.15232/aas.2023-02399","DOIUrl":"https://doi.org/10.15232/aas.2023-02399","url":null,"abstract":"<div><h3>Objective</h3><p>Our objective was to evaluate increased nu- tritional energy before AI on BW, ADG, and reproductive efficiency in heifers developed on range or in a drylot.</p></div><div><h3>Materials and Methods</h3><p>A 3-yr study used Angus crossbred heifers (n = 100/yr) near North Platte, Nebras- ka. Heifers were stratified by BW and assigned to 1 of 3 treatments. During winter development (131 ± 3.5 d/yr), heifers grazed upland range (RANGE) or were fed a drylot diet in 2 pens with a targeted gain of 0.68 kg/d to achieve 65% of mature BW (6.35 kg/head per day hay, 2.27 kg/ head per day wet corn gluten feed, and 0.34 kg/head per day supplement). Thirty-three days before AI, one dry- lot group remained on this diet (DLLO) while the other (DLHI) received an additional 4.08 kg/head per day wet corn gluten feed. Heifers developed on RANGE received 0.45 kg/head per day of a 29% CP, dried distillers grain– based pellet until 38 d before AI, when they were fed the DLLO diet.</p></div><div><h3>Results and Discussion</h3><p>Prebreeding BW was great- er for DLHI (375 ± 3.4 kg) and DLLO (363 ± 3.4 kg) compared with RANGE (312 ± 3.4 kg), but breeding ADG was greater for RANGE (0.69 ± 0.01 kg) compared with DLHI (0.35 ± 0.02 kg) and DLLO (0.37 ± 0.02 kg). Pregnancy rates to AI were similar among DLHI (69%), DLLO (63%), and RANGE (49%); final pregnancy rates tended to be different: DLHI (96%), DLLO (95%) and RANGE (84%). Calving rate and calving in the first 21 d was similar.</p></div><div><h3>Implications and Applications</h3><p>Greater nutrient and energy intake for DLHI and DLLO led to greater BW and ADG compared with RANGE, but short-term nutri- tional increase had no effect on pregnancy rate to AI nor final pregnancy rates.</p></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 2","pages":"Pages 191-198"},"PeriodicalIF":1.5,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000260/pdf?md5=66698a5d08bd784398b8a208e0eeb378&pid=1-s2.0-S2590286524000260-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140295859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of weaning and backgrounding management practices used by Alabama beef cattle producers","authors":"S. Maggie Justice ,&nbsp;M. Kimberly Mullenix ,&nbsp;D. Alex Tigue ,&nbsp;Michelle F. Elmore ,&nbsp;S.L. Dillard ,&nbsp;W.B. Smith ,&nbsp;Max Runge ,&nbsp;W. Ken Kelley","doi":"10.15232/aas.2023-02467","DOIUrl":"https://doi.org/10.15232/aas.2023-02467","url":null,"abstract":"<div><h3>Objective</h3><p>Beef calf management strategies used during the weaning and postweaning period can have extended effects on growth performance and health in the production chain. With the number of different practices beef cow-calf operators can use during these stages of production, it is important for Extension educators to understand which management strategies are most commonly used and where educational gaps might exist. The objective of this study was to determine farmer perceptions, on-farm applications, and potential barriers to adopting beef calf weaning and backgrounding strategies among Alabama producers.</p></div><div><h3>Materials and Methods</h3><p>An online survey with 24 total questions was developed and distributed to cattle producers in the state of Alabama in March 2022. Questions addressed whether producers use managed weaning and backgrounding strategies, and respondents followed a predetermined question track based on this response.</p></div><div><h3>Results and Discussion</h3><p>A total of 214 complete responses were received with 94% of respondents considering their operation to be a cow-calf operation. Most participants (46%) had a herd size of 50 cows or less. Abrupt weaning was the most widely used method of weaning (55%) among producers. Over half (61%) of producers indicated they background their calves, and another 25% stated that they do in some years but not always. For respondents that do not background their calves, market unpredictability is the main driver surrounding the decision to keep calves for backgrounding or to sell immediately after weaning. Key challenges producers who practice managed weaning and backgrounding strategies face in their operations include input costs, land availability, and market predictability. Methods for marketing backgrounded calves differed across respondents, with 49% of respondents using local livestock auctions to sell calves.</p></div><div><h3>Implications and Applications</h3><p>Developing demonstration data models to address cost benefits of weaning and backgrounding may help producers evaluate areas of challenges identified in this survey. Extension educators can apply these data to create resources centered around backgrounding cattle to help improve potential applications of management after weaning.</p></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 2","pages":"Pages 81-90"},"PeriodicalIF":1.5,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000168/pdf?md5=8758a66dd79965c43f8092dbe31ae36b&pid=1-s2.0-S2590286524000168-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140295955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Call for Submissions","authors":"","doi":"10.1016/S2590-2865(24)00043-0","DOIUrl":"https://doi.org/10.1016/S2590-2865(24)00043-0","url":null,"abstract":"","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 2","pages":"Pages iv-vi"},"PeriodicalIF":1.5,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000430/pdfft?md5=b22ba508eef3ef6914fbb3ddb33a0128&pid=1-s2.0-S2590286524000430-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140296037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interaction of an herbicide containing aminopyralid and metsulfuron and nitrogen fertilizer in tall fescue pastures grazed by stocker cattle","authors":"Eric A. Bailey ,&nbsp;Mikaela J. Adams ,&nbsp;Kevin R. Meng ,&nbsp;Joshua M. Zeltwanger ,&nbsp;Derek W. Brake ,&nbsp;Xiangwei Du","doi":"10.15232/aas.2023-02451","DOIUrl":"https://doi.org/10.15232/aas.2023-02451","url":null,"abstract":"<div><h3>Objective</h3><p>Our objective was to evaluate the effects of an herbicide containing aminopyralid and metsulfuron (Chapparal; Corteva Agriscience, Indianapolis, IN) follow- ing spring-applied nitrogen fertilizer on stocker cattle per- formance, forage species composition, seedhead density, and ergovaline concentration.</p></div><div><h3>Materials and Methods</h3><p>Each year (n = 3), 96 steers (266 ± 19.3 kg) were randomly assigned to sixteen 1.8-ha pastures. Pastures were randomly assigned 1 of 4 treat- ments: no herbicide or nitrogen (NEGCON) or herbi- cide (140 g/ha) with 0 kg/ha N (CHAP0N), 67 kg/ha N (CHAP67N), or 134 kg/ha N (CHAP134N). Ammonium nitrate was applied March 7 ±3.6 d, and herbicide was applied April 14 ±1.5 d. Steers began grazing 72 h after herbicide application. Steer weight, standing forage height, forage nutritive value, and alkaloid concentrations in tall fescue tillers were measured monthly. Tall fescue seedhead frequency and forage species frequency were col- lected June 14 ±3.1 d.</p></div><div><h3>Results and Discussion</h3><p>Tall fescue seedheads were reduced by 68% within pastures receiving herbicide. Her- bicide application did not affect ergovaline concentration, but ergovaline concentration increased across months. Ni- trogen fertilizer tended to quadratically increase forage mass. Steer ADG was greater in pastures treated with fertilizer and herbicide than in those not treated.</p></div><div><h3>Implications and Applications</h3><p>Under the condi- tions of this experiment, application of herbicide contain- ing aminopyralid and metsulfuron to tall fescue pastures decreased seedhead concentration but did not affect ergov- aline. Nitrogen fertilizer increased forage mass on pastures treated with herbicide, and the combination improved steer gain under a short-duration continuously grazed sys- tem.</p></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 2","pages":"Pages 103-111"},"PeriodicalIF":1.5,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000181/pdf?md5=eafa82908f51d5c16a7100051523cf66&pid=1-s2.0-S2590286524000181-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140295937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correlation of residual feed intake, residual average daily gain, and residual intake and gain to carcass and steak characteristics of Hereford × Brahman steers","authors":"T.J. Machado ,&nbsp;K.L. Montemayor ,&nbsp;F.M. Rouquette Jr ,&nbsp;R. Reuter ,&nbsp;J.C. Paschal ,&nbsp;R.D. Randel","doi":"10.15232/aas.2023-02445","DOIUrl":"https://doi.org/10.15232/aas.2023-02445","url":null,"abstract":"<div><h3>Objective</h3><p>Our objective was to expand the understanding of <em>Bos indicus</em> feed efficiency by utilizing Hereford × Brahman steers to determine if residual feed intake (RFI), residual average daily gain (RADG), and residual intake and gain (RIG) influence carcass and steak characteristics.</p></div><div><h3>Materials and Methods</h3><p>Hereford × Brahman steers (n = 29; age ± SD = 261 ± 41 d) were transported to a facility with a GrowSafe System (GrowSafe Systems Ltd.) to determine RFI, RADG, and RIG, then to a feedyard (BW of 391 ± 39.0 kg), fed 89 d, and slaughtered (BW 731 ± 70 kg). Steers were categorized on their value compared with the mean (x) for RFI, RADG, and RIG into groups of efficient, less efficient, less inefficient, and inefficient.</p></div><div><h3>Results and Discussion</h3><p>Efficiency measurements RFI, RADG, and RIG were not correlated with carcass or steak characteristics. Carcasses from less inefficient RADG steers had the least internal fat. Carcasses from less efficient RIG steers had the most adjusted backfat, and less inefficient RIG steers had lower yield grades than the less efficient and inefficient RIG steers. Steaks from the less inefficient RFI steers were tougher than the efficient and less efficient RFI. All other carcass and steak characteristics were not different.</p></div><div><h3>Implications and Applications</h3><p>The results provide information about RFI, RADG, and RIG for Brahman- influenced herds and consideration of the small sample size should occur when applying the information to management decisions for beef herds.</p></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 2","pages":"Pages 167-175"},"PeriodicalIF":1.5,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000247/pdf?md5=fe7037642d08731e8e9afa5474ff7a2f&pid=1-s2.0-S2590286524000247-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140295961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing beef producers’ interest in cooperative business models in New Hampshire, Maine, and Vermont","authors":"E.M. Enzien ,&nbsp;P.S. Erickson ,&nbsp;A.B. Bruce ,&nbsp;C.W. Knight ,&nbsp;A.B. Conroy","doi":"10.15232/aas.2023-02478","DOIUrl":"https://doi.org/10.15232/aas.2023-02478","url":null,"abstract":"<div><h3>Objective</h3><p>This study assessed the characteristics of northern New England producers and their willingness to participate in cooperative marketing (CM) or cooperative processing (CoP) of beef cattle.</p></div><div><h3>Materials and Methods</h3><p>A survey was conducted with producers in the region. Pearson correlation coeffi- cients were used to evaluate whether producers were will- ing to participate in CM or CoP. Two multiple regression models were created using variance inflation procedures and backward elimination to predict whether producers were likely to participate in CM and CoP.</p></div><div><h3>Results and Discussion</h3><p>A total of 174 surveys were returned and 161 were usable for analysis. Producers in- terested in CoP were likely also to be interested in CM, but producers with an established business were not in- terested in CoP. Producers interested in mobile slaughter units and access to CoP were interested in participating in CoP than their counterparts. The regression model pre- dicted those less interested in CM were producers who had hired labor and concerns about regulations. The regres- sion model for CoP indicated that producers who reported more consistent herd sizes (number of cattle processed) were less likely to participate, whereas those interested in CM were more likely to participate.</p></div><div><h3>Implications and Applications</h3><p>New and smaller producers may be more likely to participate in CM or CoP than larger, more established producers in northern New England. Our analysis helps identify the characteristics of northern New England beef producers interested in form- ing cooperative businesses. This research approach could be used in other areas to determine the characteristics of beef producers interested in CM and processing.</p></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 2","pages":"Pages 212-226"},"PeriodicalIF":1.5,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000296/pdfft?md5=f061af92a06330c65fdd5b6e32d77aee&pid=1-s2.0-S2590286524000296-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140296035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}