Applied Animal Science最新文献

{"title":"Call for Submissions","authors":"","doi":"10.1016/S2590-2865(24)00090-9","DOIUrl":"10.1016/S2590-2865(24)00090-9","url":null,"abstract":"","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 4","pages":"Pages iv-vi"},"PeriodicalIF":1.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000909/pdfft?md5=4a413c79c891007c42526c880829d9af&pid=1-s2.0-S2590286524000909-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141952109","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":"Identifying and quantifying key sustainability indicators for pastoral dairy-beef production systems","authors":"M. Kearney ,&nbsp;E.G. O’Riordan ,&nbsp;C.J. Byrne ,&nbsp;J. Breen ,&nbsp;P. Crosson","doi":"10.15232/aas.2023-02529","DOIUrl":"10.15232/aas.2023-02529","url":null,"abstract":"<div><h3>Objective</h3><p>The objective of this study was to quantify the sustainability of representative dairy-beef farms in Ireland (AVE) and to compare these with dairy-beef farms participating in a farm improvement program (IMP) and research (RES) systems. The study aimed to determine the differences in technical performance and key sustainability indicators among these farm categories.</p></div><div><h3>Material and Methods</h3><p>Within each farm category, dairy-beef systems differing in sire breed (early maturing, late maturing, and Holstein-Friesian), animal sex (steer and heifer), finishing age (ranging from 18 to 30 mo of age), and production system (finishing from grazing or indoor-based systems) were modeled using the Grange Dairy-Beef Systems Model.</p></div><div><h3>Results and Discussion</h3><p>The average finishing age was 25.4, 23.8, and 20.6 mo on AVE, IMP, and RES, respectively. Results highlighted a wide range in net margins (from €185 to €806 per hectare; €1 = $1.05) for the systems modeled. Sex had the largest effect on profitability (steer greater than heifer), followed by finishing system (finishing from grazing systems greater than indoor systems) and breed type (late maturing greatest and Holstein-Friesian least). Greenhouse gas emissions of the 3 farm categories ranged from 10.8 to 16.6 kg of carbon dioxide equivalents (CO₂eq) per kilogram of carcass weight produced. All farm categories were, on average, net producers of human-edible protein, and all farms were net consumers of human-edible energy.</p></div><div><h3>Implications and Applications</h3><p>Key sustainability performance indicators identified in this study include carcass output per hectare, reduced age at slaughter, high individual animal performance, and increasing of the proportion of grazed pasture in the animal’s diet. There is a temporal dimension to ranking farm categories from an economic, environment, labor, feed-food competition, and land-use perspective because none of the 3 farm categories investigated were without fault from a sustainable dairy- beef production perspective.</p></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 4","pages":"Pages 570-590"},"PeriodicalIF":1.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000855/pdf?md5=14d0da866f16c827dec6117876198353&pid=1-s2.0-S2590286524000855-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141962225","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 the degree of steam flaking of corn and concentration of dietary wet distillers grains on energy metabolism of feedlot cattle*","authors":"Christian H. Ponce ,&nbsp;N. Andy Cole ,&nbsp;Beverly E. Meyer ,&nbsp;Jenny J. Jennings ,&nbsp;Mike S. Brown","doi":"10.15232/aas.2024-02546","DOIUrl":"10.15232/aas.2024-02546","url":null,"abstract":"<div><h3>Objective</h3><p>The objective of this study was to determine the effects of degree of steam flaking of corn (SFC) on energy metabolism of finishing cattle fed diets containing wet distillers grains with solubles (WDGS).</p></div><div><h3>Materials and Methods</h3><p>Crossbred steers (n = 4; initial BW = 308 ± 7.0 kg) were randomly assigned to 4 diets containing 0% or 20% WDGS and corn steam flaked to either 321 or 270 g/L bulk density (26 or 22 lb/bu, respectively) in a 2 × 2 factorial arrangement. Energy metabolism was measured in respiration chambers with a 4 × 4 Latin square design.</p></div><div><h3>Results and Discussion</h3><p>There were no interactions between WDGS concentration and SFC bulk density for nutrient digestion, nitrogen metabolism, or energy metabolism values. Digestibility of OM, NDF, and ether extract were not influenced by the degree of steam flaking of corn. Decreasing bulk density of SFC increased starch digestion, tended to increase the ratio of DE to digestible OM, and numerically decreased the plasma urea-N concentration, but did not significantly affect ME concentration or the DE:TDN ratio. Replacing SFC with 20% WDGS decreased fat digestion but did not affect digestion of other nutrients or dietary energy values.</p></div><div><h3>Implications and Applications</h3><p>Results suggest that increasing the degree of steam flaking of corn to less than 321 g/L does not improve diet digestibility or energy metabolism of cattle fed diets containing 0% or 20% WDGS.</p></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 4","pages":"Pages 511-525"},"PeriodicalIF":1.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S259028652400079X/pdf?md5=49e43357012de87caf1a6d8853ddc00b&pid=1-s2.0-S259028652400079X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141952098","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":"Evaluation of dual-purpose wheat varieties in the Southeast United States","authors":"M.H. West ,&nbsp;W.B. Smith ,&nbsp;M.K. Mullenix ,&nbsp;A.N. Rabinowitz ,&nbsp;S.L. Dillard","doi":"10.15232/aas.2023-02450","DOIUrl":"10.15232/aas.2023-02450","url":null,"abstract":"<div><h3>Objective</h3><p>Dual-purpose wheat (<em>Triticum aestivum</em> L.) systems are commonly used in the Great Plains of the United States but are not often used in the Southeast. This study aimed to evaluate the viability of dual-purpose wheat management in the Southeast.</p></div><div><h3>Materials and Methods</h3><p>Wheat varieties evaluated were generic feed type (unknown variety blend, Feed), seed type GA Gore (Seed), and 2 forage types, AGS 2024 (AGS) and Pioneer 26R41 (Pioneer). The experiment was a randomized complete block design (n = 4) conducted during the winters of 2021 and 2022. Three grazing frequencies were used: an ungrazed control (NG) and low-frequency (LF) or high-frequency (HF) grazing. Low- frequency plots received monthly grazing in January and February, whereas HF treatments received a third grazing in March. Destructive forage sampling occurred at monthly intervals. Data were analyzed using PROC GLIMMIX of SAS (v. 9.4, SAS Institute Inc., Cary, NC), with differences declared at <em>P</em> &lt; 0.05. Ad hoc economic evaluation was performed for establishment costs and potential net returns.</p></div><div><h3>Results and Discussion</h3><p>Before grazing, AGS herbage mass (2,660 kg/ha) was greater than all other varieties. Compared with all other varieties, AGS had greater ADF (24.9%) and least TDN (72.5%). Across grazing frequencies, Pioneer had greater final grain yield (3,620 kg DM/ ha), with Seed having the least (1,270 kg DM/ha). Dual- purpose returns above costs were greatest for Pioneer.</p></div><div><h3>Implications and Applications</h3><p>Results indicate that common southeastern wheat varieties can be successfully used in a dual-purpose management system.</p></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 4","pages":"Pages 446-455"},"PeriodicalIF":1.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000739/pdf?md5=7819806e9a426fc44125fe47d8c2d2f5&pid=1-s2.0-S2590286524000739-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141962211","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":"Producer perceptions of US livestock indemnity policy","authors":"Victoria L. Campbell ,&nbsp;Jada M. Thompson ,&nbsp;Jenny L. Apriesnig ,&nbsp;Glynn T. Tonsor ,&nbsp;Dustin L. Pendell","doi":"10.15232/aas.2024-02543","DOIUrl":"10.15232/aas.2024-02543","url":null,"abstract":"<div><h3>Objective</h3><p>Livestock disease management is crucial for producers. To control and eradicate disease, the US gov- ernment has a duty to depopulate infected or potentially infected animals, and current indemnity policy dictates that producers must receive fair market compensation for depopulated animals. This study surveys producers’ pref- erences regarding livestock indemnity policy to better un- derstand ordered preferences for any changes in the future.</p></div><div><h3>Materials and Methods</h3><p>Through a ranked-ordered probit model, we analyzed producers’ rankings of 4 dif- ferent types of indemnity from an online producer survey.</p></div><div><h3>Results and Discussion</h3><p>Based on the responding producers, the most preferred method of livestock indem- nity is fair market value for the animal, and the second most preferred indemnity policy is government-subsidized livestock insurance.</p></div><div><h3>Implications and Applications</h3><p>The results indicate heterogeneity in preference rankings across producers and by producer characteristics. Our findings provide policy- makers with information on producers’ opinions for com- pensation after a disease outbreak. These insights allow legislators to consider producers’ preferences when updat- ing or creating new policies regarding livestock disease management in the future.</p></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 4","pages":"Pages 542-548"},"PeriodicalIF":1.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S259028652400082X/pdf?md5=fb07e4a5ca0207062598d791b93a5a97&pid=1-s2.0-S259028652400082X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141962214","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":"Validation of Brix for predicting sugar concentrations of alfalfa and orchardgrass*","authors":"Eric D. Billman ,&nbsp;Kathy J. Soder ,&nbsp;Jeff Horst ,&nbsp;Aimee Hafla ,&nbsp;Kristi Balk","doi":"10.15232/aas.2024-02552","DOIUrl":"10.15232/aas.2024-02552","url":null,"abstract":"<div><h3>Objectives</h3><p>The objective of this study was to evaluate the accuracy of Brix in predicting sugar concentrations in fresh alfalfa (ALF; <em>Medicago sativa</em> L.) and orchardgrass (OG; <em>Dactylis glomerata</em> L.) forages to be used as an inexpensive and rapid field-level assessment of relative energy in forages.</p></div><div><h3>Materials and Methods</h3><p>In a 2-yr study, fresh forages samples from ALF and OG monoculture pastures in central Pennsylvania, USA, were collected once monthly from May to September. Samples were immediately evaluated for Brix values with a hand-held digital refractometer, and the remaining biomass was frozen immediately with liquid N to halt cellular respiration. Samples were lyophilized and analyzed for individual sugars and wet chemistry nutritive analyses.</p></div><div><h3>Results and Discussion</h3><p>Brix was positively correlated with total and individual sugars in ALF during late spring and late summer (0.53–0.93), but correlations were nonexistent or negative in mid-summer. However, Brix values did not correlate with any notable sugar parameters in OG beyond the first sampling date. These findings were attributed to greater fibrous fraction contamination, lower sugar concentrations found in grasses and legumes compared with horticultural crops, and changes in seasonal growth of ALF and OG.</p><p><strong>Implications and Applications</strong></p><p>Brix values did not consistently predict sugar concentrations in fresh ALF and OG forages. Because Brix measures dissolved solids in solution (not just sugars), Brix readings collected from crushed ALF or OG samples may be confounded by fibrous fractions found in the solution. Brix accuracy may also be dependent on seasonal temperature patterns, plant growth stage, and daily weather patterns. Other solutions should be investigated that rapidly assess sugar profiles and nutritive values of fresh forages.</p></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 4","pages":"Pages 437-445"},"PeriodicalIF":1.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000727/pdf?md5=145fd675dfac50d569a8dd49fa7ddbce&pid=1-s2.0-S2590286524000727-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141962213","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":"\"August\" Cover","authors":"","doi":"10.1016/S2590-2865(24)00086-7","DOIUrl":"10.1016/S2590-2865(24)00086-7","url":null,"abstract":"","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 4","pages":"Page OFC"},"PeriodicalIF":1.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000867/pdfft?md5=81c106185b5369f9911e578b8c252aaa&pid=1-s2.0-S2590286524000867-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141952106","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 supplemental rumen-degradable protein, rumen undegradable protein, and energy on performance of growing beef steers grazing corn residue","authors":"B.T. Tibbitts ,&nbsp;R.M. Jones ,&nbsp;C.A. Welchons ,&nbsp;R.L. Ziegler ,&nbsp;K.H. Wilke ,&nbsp;R.N. Funston ,&nbsp;J.C. MacDonald","doi":"10.15232/aas.2023-02522","DOIUrl":"10.15232/aas.2023-02522","url":null,"abstract":"<div><h3>Objective</h3><p>The objective of Exp. 1 was to evaluate the effects of adding urea to modified distillers grains with solubles (MDGS) when supplemented to growing steers and in Exp. 2 to evaluate whole corn as an alternative to dried distillers grains with solubles (DDGS) for growing steers grazing cornstalk residue.</p></div><div><h3>Methods and Materials</h3><p>In Exp. 1, 120 crossbred beef steers (initial BW = 244 kg, SD = 19 kg) grazed corn residue for 72 d. Treatments were a 2 × 2 factorial arrangement of MDGS inclusion (1.4 or 2.3 kg/d) and urea inclusion (0 or 0.05 kg/d). Residue diet samples were collected to determine CP, in vitro organic matter disap- pearance (IVOMD) and digestible organic matter (DOM). Steers were individually supplemented daily. Data were analyzed using the MIXED procedures of SAS. In Exp. 2, 75 crossbred steer calves (235 kg, SD = 3.5) grazed corn residue for 86 d. Treatments were arranged in a ran- domized complete block design, which included (1) a non- supplemented control, (2) whole corn, (3) whole corn with urea in a molasses carrier (corn/mol/urea), (4) DDGS, and (5) 60% SoyPass + 40% soybean meal (SoyPass/ SBM). Supplements were designed to be isocaloric. Data were analyzed using the GLIMMIX procedures of SAS. Results were considered significant at <em>P</em> ≤ 0.05.</p></div><div><h3>Results and Discussion</h3><p>No MDGS × urea inter- actions were observed for growth performance (Exp. 1). Steers supplemented with 2.3 kg MDGS had greater ADG than those supplemented with 1.4 kg MDGS (1.05 kg/d vs. 0.83 respectively). Urea level did not affect ending BW or ADG. The IVOMD and DOM of the grazed residue decreased linearly and quadratically, respectively, as the grazing progressed as expected, but CP was not different. In Exp. 2, nonsupplemented calves lost weight (0.08 kg/d) Calves receiving whole corn had greater gains (0.14 kg/d) than the nonsupplemented calves but less than corn/ mol/urea (0.24 kg/d). The DDGS and SoyPass/SBM had greater gains than the other treatments, but were not dif- ferent from each other (0.60 and 0.67 kg/d, respectively).</p></div><div><h3>Implications and Applications</h3><p>These data suggest adding RDP when supplementing MDGS is unnecessary and that feeding whole corn, even with a source of NPN to supply RDP does not result in similar performance as feeding DDGS or SoyPass/SBM.</p></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 4","pages":"Pages 526-534"},"PeriodicalIF":1.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000806/pdf?md5=568e4f99dc75181f8d320ced5108092d&pid=1-s2.0-S2590286524000806-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141952110","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 days on feed on performance and carcass characteristics of crossbred beef × dairy heifers","authors":"T.C. Husz ,&nbsp;A.B. Word ,&nbsp;K.J. Karr ,&nbsp;B.P. Holland ,&nbsp;T.E. Lawrence ,&nbsp;T.L. Perkins ,&nbsp;J.P. Hutcheson ,&nbsp;L.J. Walter","doi":"10.15232/aas.2023-02500","DOIUrl":"10.15232/aas.2023-02500","url":null,"abstract":"<div><h3>Objective</h3><p>The objective was to evaluate the effect of days on feed (DOF) on performance and carcass characteristics of crossbred beef × dairy heifers.</p></div><div><h3>Materials and Methods</h3><p>Beef × dairy heifers (n = 3,765; initial BW = 508 ± 8.55 kg) were blocked by arrival date and lot (n = 6 blocks at feedyard 1 and n = 7 blocks at feedyard 2) and randomly assigned to 1 of 4 DOF treatments of 323, 344, 362, or 385 when administered a Revalor-200 (200 mg of trenbolone acetate [TBA] and 20 mg of estradiol [E₂]) on d 265.</p></div><div><h3>Results and Discussion</h3><p>Dry matter intake was not affected by DOF, whereas final BW increased linearly from 593 to 655 kg. As DOF increased, ADG and gain: feed decreased quadratically. Hot carcass weight, LM area, calculated YG, and marbling score increased linearly as DOF increased. Across the 63-d serial slaughter period, hot carcass weight increased 0.67 kg/d. Dressing percentage and backfat thickness increased in a quadratic manner across DOF. Further, QG and YG distribution increased linearly as DOF increased. Liver abscess prevalence or severity did not increase with DOF.</p><p><strong>Implications and Applications</strong></p><p>Results of this study indicate that extending DOF by 63 d led to increased BW, hot carcass weight, LM area, marbling, YG, and QG but poorer ADG and feed conversion efficiency for beef × dairy crossbred heifers.</p></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 4","pages":"Pages 549-559"},"PeriodicalIF":1.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000831/pdf?md5=ccc24cd9f899153400b3f75e8c2de6f4&pid=1-s2.0-S2590286524000831-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141962210","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":"Ability of an enhanced zeolite-based flow agent to mitigate the effects of ergot-like alkaloids consumed by beef cattle","authors":"Joshua M. Zeltwanger ,&nbsp;Eric A. Bailey ,&nbsp;Emily A. Petzel ,&nbsp;Benjamin M. Nelson ,&nbsp;Derek W. Brake ,&nbsp;J. Tyler Leonhard ,&nbsp;Landon G. Canterbury ,&nbsp;Jerilyn E. Hergenreder","doi":"10.15232/aas.2023-02464","DOIUrl":"10.15232/aas.2023-02464","url":null,"abstract":"<div><h3>Objective</h3><p>Our objective was to evaluate how a particular zeolite-based flow agent affected ergot alkaloid digestion and physiological markers associated with fescue toxicosis.</p></div><div><h3>Materials and Methods</h3><p>Twenty-four steers (226 ± 27.6 kg) were used to test effects of enhanced zeolite-based flow agent (KALLSIL, Kemin Industries, Des Moines, IA) on ergot-like alkaloid digestion. Treatments were control (E+) or enhanced zeolite inclusion (E+Z; 2 g/kg, DM basis). Steers were limit-fed diets (1.8% of BW, DM basis) containing 465 μg of ergovaline/kg of DM. Rectal temperature and respiration rate were recorded daily at 0700 and 1200 h from steers in a room kept at 18.5°C ± 0.33°C, 32.6% ± 2.19% relative humidity. Blood was collected on d 1, 7, 14, and 21 to measure prolactin. On d 21 prolactin stores were measured following infusion of thyrotropin- releasing hormone (TRH; 1 μg/kg BW). Feces and urine were collected every 8 h from d 17 to 20, with 2-h advancement daily for digestibility, N balance, and recovery of ergot-like alkaloids.</p></div><div><h3>Results and Discussion</h3><p>Digestion and N balance were not affected by treatment. Zeolite did not affect fecal recovery of ergovaline. Serum prolactin declined over time. Serum prolactin was greater in steers fed E+Z. Following TRH infusion, prolactin was numerically greater for E+Z. Rectal temperatures and respiration rates were not affected by E+Z.</p></div><div><h3>Implications and Applications</h3><p>Under the conditions of this experiment, addition of this particular zeolite-based feed additive had minimal impact on ergot alkaloid recovery and physiological markers associated with fescue toxicosis.</p></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 4","pages":"Pages 504-510"},"PeriodicalIF":1.4,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000788/pdf?md5=18a40a1ef1d561762a01e3fd1fa16856&pid=1-s2.0-S2590286524000788-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141962226","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}