Applied Animal Science最新文献

筛选
英文 中文
"April" Cover "四月 "封面
IF 1.5
Applied Animal Science Pub Date : 2024-03-27 DOI: 10.1016/S2590-2865(24)00038-7
{"title":"\"April\" Cover","authors":"","doi":"10.1016/S2590-2865(24)00038-7","DOIUrl":"https://doi.org/10.1016/S2590-2865(24)00038-7","url":null,"abstract":"","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 2","pages":"Page OFC"},"PeriodicalIF":1.5,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000387/pdfft?md5=d0a7c110c07b770ce270222a06f6c835&pid=1-s2.0-S2590286524000387-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140296036","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}
引用次数: 0
February" Cover 二月 "封面
IF 1.5
Applied Animal Science Pub Date : 2024-02-01 DOI: 10.1016/S2590-2865(24)00007-7
{"title":"February\" Cover","authors":"","doi":"10.1016/S2590-2865(24)00007-7","DOIUrl":"https://doi.org/10.1016/S2590-2865(24)00007-7","url":null,"abstract":"","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 1","pages":"Page OFC"},"PeriodicalIF":1.5,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000077/pdfft?md5=d70633ca2041a241600cd8d722a2c463&pid=1-s2.0-S2590286524000077-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139652975","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}
引用次数: 0
Effects of starch dilution with corn stalks or wet distillers grains with solubles on growth performance and carcass characteristics of feedlot steers 用玉米秸秆或带溶解物的湿蒸馏谷物稀释淀粉对饲养场母牛生长性能和胴体特征的影响
IF 1.5
Applied Animal Science Pub Date : 2024-02-01 DOI: 10.15232/aas.2023-02459
A.M. Kobza , J.D. Young , J.T. Richeson , T.E. Lawrence , M.E. Youngers , K.L. Samuelson
{"title":"Effects of starch dilution with corn stalks or wet distillers grains with solubles on growth performance and carcass characteristics of feedlot steers","authors":"A.M. Kobza ,&nbsp;J.D. Young ,&nbsp;J.T. Richeson ,&nbsp;T.E. Lawrence ,&nbsp;M.E. Youngers ,&nbsp;K.L. Samuelson","doi":"10.15232/aas.2023-02459","DOIUrl":"https://doi.org/10.15232/aas.2023-02459","url":null,"abstract":"<div><h3>Objective</h3><p>This study evaluated the effects of starch dilution with different sources of dietary fiber from terminal implant to slaughter on growth performance, energy utilization, and carcass characteristics of feedlot cattle.</p></div><div><h3>Materials and Methods</h3><p>Steers (n = 416; initial BW = 372 ± 2.67 kg) were allocated to 48 pens in a randomized complete block design. Pens of cattle (n = 12 per treatment) were assigned to 1 of 4 treatments consisting of diets based on steam-flaked corn, containing (1) 7.50% corn stalks on a DM basis fed for the entire feeding period (CON), (2) 14.75% corn stalks on a DM basis fed from terminal implant to slaughter (CS), (3) 9.50% wet distillers grains with solubles and 7.50% corn stalks on a DM basis fed from terminal implant to slaughter (WD), and (4) 19.00% wet distillers grains with solubles and 0.0% corn stalks on a DM basis fed from terminal implant to slaughter (NR). Six days before administration of the terminal implant, steers were transitioned to their treatment diets using a 2-ration system, whereas CON consumed the same diet throughout the entire feeding period.</p></div><div><h3>Results and Discussion</h3><p>As expected, performance (BW, DMI, ADG, G:F) was not different from d 0 of the study to dietary transition. Dry matter intake and calculated ME intake from dietary transition to slaughter were greatest for cattle consuming CS, intermediate for WD and CON, and least for NR. Final BW and ADG did not differ among treatments from dietary transition to slaughter; G:F was greatest for NR, intermediate for WD, and least for CS and CON. There was no difference in hot carcass weight, DP, marbling score, QG, YG, or percentage KPH among treatments. Steers consuming CS had greater 12th-rib s.c. fat thickness. The proportion of abscessed livers did not differ among treatments.</p></div><div><h3>Implications and Applications</h3><p>Increasing the proportion of corn stalks in the diet after terminal implant administration increased DMI and ME intake with no effect on G:F. In contrast, removing corn stalks from the diet and increasing the proportion of wet distillers grains with solubles to provide an equivalent starch concentration reduced DMI and improved G:F.</p></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 1","pages":"Pages 29-39"},"PeriodicalIF":1.5,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S259028652400003X/pdf?md5=175b831567b349da84a4d160a842a26e&pid=1-s2.0-S259028652400003X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139653008","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}
引用次数: 0
Economic-impact variability among F1 Nellore–Angus herd sires reared together and used in multiple-sire mating groups 多胎交配组中共同饲养的 F1 内洛尔-安格斯种群父本之间的经济影响差异
IF 1.5
Applied Animal Science Pub Date : 2024-02-01 DOI: 10.15232/aas.2023-02419
Logan T. Dodd , David P. Anderson , David G. Riley , Andy D. Herring
{"title":"Economic-impact variability among F1 Nellore–Angus herd sires reared together and used in multiple-sire mating groups","authors":"Logan T. Dodd ,&nbsp;David P. Anderson ,&nbsp;David G. Riley ,&nbsp;Andy D. Herring","doi":"10.15232/aas.2023-02419","DOIUrl":"https://doi.org/10.15232/aas.2023-02419","url":null,"abstract":"<div><h3>Objective</h3><p>This study investigated variation of calf number and resulting economic impacts of F<sub>1</sub> crossbred sires that were reared together as calves and used in multi- sire, natural-service breeding groups.</p></div><div><h3>Materials and Methods</h3><p>Birth (n = 540) and weaning (n = 533) calf records were evaluated retrospectively in a crossbred research herd. Sires per annual breeding group varied from 6 to 9; females exposed per bull ranged from 12.5 to 19.5 across years. Bulls born in the same year were reared together, and all bulls were pastured together when not in breeding groups. Calf performance and economic value were determined annually per sire. Mixed model analyses were conducted that included fixed categorical effects of calf birth year, F<sub>1</sub> sire type (Angus-sired vs. Nellore-sired), sire nested within type, calf sex, and the interaction of F<sub>1</sub> sire type with calf sex.</p></div><div><h3>Results and Discussion</h3><p>Large differences were observed in calf numbers and performance. Weaned calves produced annually per sire ranged from 0 to 48, when average expectations were 10.5 to 15.2. Average annual calf performance per sire ranged from 29.7 to 49.4 kg for birth weight and 197.4 to 241.4 kg for weaning weight. Annual economic contribution per sire ranged from $0 to $29,582 when considering half of calf value as being attributed to the sire.</p></div><div><h3>Implications and Applications</h3><p>Commercial cow- calf producers should consider potential sire variability for calf numbers and birth date in combination with traditional calf performance for improved economic assessments in their herds.</p></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 1","pages":"Pages 69-79"},"PeriodicalIF":1.5,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000065/pdf?md5=e30c9a15ea624bb525323b75f9cb1a6b&pid=1-s2.0-S2590286524000065-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139653013","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}
引用次数: 0
Growth performance, carcass traits, and feeder calf value of beef × Holstein and Holstein feedlot steers* 牛肉×荷斯坦和荷斯坦饲养场母牛的生长性能、胴体性状和饲养犊牛价值*
IF 1.5
Applied Animal Science Pub Date : 2024-02-01 DOI: 10.15232/aas.2023-02454
M. Pimentel-Concepción , J.R. Jaborek , J.P. Schweihofer , A.J. Garmyn , M.-G.-S. McKendree , B.J. Bradford , A. Hentschl , D.D. Buskirk
{"title":"Growth performance, carcass traits, and feeder calf value of beef × Holstein and Holstein feedlot steers*","authors":"M. Pimentel-Concepción ,&nbsp;J.R. Jaborek ,&nbsp;J.P. Schweihofer ,&nbsp;A.J. Garmyn ,&nbsp;M.-G.-S. McKendree ,&nbsp;B.J. Bradford ,&nbsp;A. Hentschl ,&nbsp;D.D. Buskirk","doi":"10.15232/aas.2023-02454","DOIUrl":"https://doi.org/10.15232/aas.2023-02454","url":null,"abstract":"<div><h3>Objective</h3><p>The objective of this study was to compare feedlot performance, carcass traits, and value of beef × Holstein (B × HO) and Holstein (HO) feedlot steers.</p></div><div><h3>Materials and Methods</h3><p>After a 21-d acclimation to the feedlot, steers (B × HO, n = 60 and HO, n = 60) were blocked by BW into 10 pens per breed type. Steer BW gain, DMI, and G:F were measured on a 28-d basis. Steers were slaughtered at a commercial abattoir on d 245 for B × HO and 266 for HO, after reaching an average carcass empty body fat of 30.0%. Following a 48-h chill, carcass data were collected.</p></div><div><h3>Results and Discussion</h3><p>The B × HO steers tended to have 5% greater ADG (1.75 vs. 1.70 kg/d) compared with the HO steers but similar DMI (10.40 vs. 10.35 kg/d). The B × HO steers had 4% greater G:F compared with HO steers (0.172 vs. 0.165). Cost of gain was 14% less for B × HO compared with HO steers ($2.68 vs. $2.83/ kg). Although final live BW tended to be less for B × HO compared with HO steers (622 vs. 635 kg), carcass weights were similar between breed types (365 vs. 367 kg). The B × HO steers had 20% greater LM area (87.8 vs. 73.1 cm<sup>2</sup>), greater backfat thickness (1.18 vs. 0.79 cm), and a lesser average calculated USDA YG (2.9 vs. 3.2) than HO steers. The B × HO and HO steers had similar average marbling scores (426 vs. 437) and USDA QG. Based on abattoir prices, carcass revenue was greater for B × HO steers ($1,836/carcass) when compared with HO steers ($1,800/carcass). Based on a mean receiving BW of 171.9 kg, calculated breakeven feeder calf value was greater for B × HO steers compared with HO steers ($367 vs. $284/100 kg).</p></div><div><h3>Implications and Applications</h3><p>Overall, B × HO steers were more feed efficient and produced carcasses with more desirable carcass yield, resulting in greater feeder calf value when compared with HO steers.</p></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 1","pages":"Pages 56-68"},"PeriodicalIF":1.5,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000053/pdf?md5=0949e672839ac76c5e5eec771f03ecbb&pid=1-s2.0-S2590286524000053-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139653014","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}
引用次数: 0
Can moderate-quality bermudagrass baleage be used to stretch wheat pasture?* 是否可以使用中等质量的百慕大草捆来拉伸小麦牧场?
IF 1.5
Applied Animal Science Pub Date : 2024-02-01 DOI: 10.15232/aas.2023-02466
P.A. Beck , M.R. Beck , D. Hubbell III , T. Hess , A.P. Foote , M.S. Gadberry , E.B. Kegley
{"title":"Can moderate-quality bermudagrass baleage be used to stretch wheat pasture?*","authors":"P.A. Beck ,&nbsp;M.R. Beck ,&nbsp;D. Hubbell III ,&nbsp;T. Hess ,&nbsp;A.P. Foote ,&nbsp;M.S. Gadberry ,&nbsp;E.B. Kegley","doi":"10.15232/aas.2023-02466","DOIUrl":"https://doi.org/10.15232/aas.2023-02466","url":null,"abstract":"<div><h3>Objectives</h3><p>Our objective was to determine the effects of feeding free-choice bermudagrass (<em>Cynodon dactylon</em>) round-bale silage to growing calves stocked at increasing rates and grazing wheat (<em>Triticum aestivum</em> L.) pasture in north-central Arkansas.</p></div><div><h3>Materials and Methods</h3><p>In the fall and winter, steers were stocked at 2.47 steers/ha without bermudagrass bale- age (HCON) or were stocked at 1× (H1.0), 1.5× (H1.5), or 2× (H2.0) the HCON stocking rate with <em>ad libitum</em> access to bermudagrass round-bale wrapped silage. Each pasture was stocked at 5.6 steers/ha (8 steers per pasture) in the spring, with continued <em>ad libitum</em> silage offered to pastures in the H1.0, H1.5, and H2.0 fall treatments.</p></div><div><h3>Results and Discussion</h3><p>When steers in H1.0 were offered <em>ad libitum</em> bermudagrass haylage with no change in stocking rate, ADG were increased by 12% over HCON to 1.43 kg/d. As stocking rate increased in the fall and winter from H1.0 to H1.5 and H2.0 treatments, ADG decreased. The ADG of H1.5 (1.25 kg/d) did not differ from HCON (1.27 kg/d), and ADG of H2.0 (1.12 kg/d) was reduced by 12% compared with HCON. There was no effect of of- fering supplemental round-bale haylage on ADG of steers grazing graze-out wheat pastures. Steer grazing days per hectare increased when round-bale haylage was offered, even though stocking rates were not increased during this part of the experiment. Total system net returns did not differ between HCON and H1.0. However, total system net return ($876/ha) was greater for H2.0 compared with H1.0 ($571/ha), whereas H1.5 ($693/ha) was intermediate, dif- fering from neither H1.0 nor H2.0.</p></div><div><h3>Implications and Applications</h3><p>Feeding moderate- quality roughage during the fall can increase production stability and thus improve economic stability of the wheat stocker enterprise. There does not appear to be an eco- nomic advantage of feeding moderate-quality roughage <em>ad libitum</em> to stockers grazing spring wheat when producers decide to forgo wheat grain harvest and steers graze out the wheat crop.</p></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 1","pages":"Pages 1-13"},"PeriodicalIF":1.5,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000016/pdf?md5=bb9f303099fe93f2df2cf4923eb96d81&pid=1-s2.0-S2590286524000016-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139653010","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}
引用次数: 0
Call for Submissions 征集作品
IF 1.5
Applied Animal Science Pub Date : 2024-02-01 DOI: 10.1016/S2590-2865(24)00011-9
{"title":"Call for Submissions","authors":"","doi":"10.1016/S2590-2865(24)00011-9","DOIUrl":"https://doi.org/10.1016/S2590-2865(24)00011-9","url":null,"abstract":"","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 1","pages":"Pages iii-v"},"PeriodicalIF":1.5,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000119/pdfft?md5=a2b51d9edcf654deebd690a19ab256b8&pid=1-s2.0-S2590286524000119-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139653011","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}
引用次数: 0
Modeling differences in feed intake and efficiency: Growing and finishing beef cattle 采食量和效率差异模型:生长和育成肉牛
IF 1.5
Applied Animal Science Pub Date : 2024-02-01 DOI: 10.15232/aas.2023-02443
Carl A. Old , Ian J. Lean , Heidi A. Rossow , Daniel W. Shike
{"title":"Modeling differences in feed intake and efficiency: Growing and finishing beef cattle","authors":"Carl A. Old ,&nbsp;Ian J. Lean ,&nbsp;Heidi A. Rossow ,&nbsp;Daniel W. Shike","doi":"10.15232/aas.2023-02443","DOIUrl":"https://doi.org/10.15232/aas.2023-02443","url":null,"abstract":"<div><h3>Objective</h3><p>Our objective was to evaluate model structure choice on estimates of efficiency, based on residual feed intake, and thereby cattle profitability.</p></div><div><h3>Materials and Methods</h3><p>Efficiencies were compared for 2 models using data from 7 studies (509 cattle). Model 1 DMI were estimated using ordinary least squares as <em>f</em>(ADG and BW<sup>0.750</sup>). Model 2 was a multivariable Bayesian model; DMI was <em>f</em>(ADG, BW<sup>0.750</sup> and BW). For model 2, DMI, BW, and ADG were ranked by model 1 residuals categorized in quintile to evaluate whether information found in residuals related to composition of gain or maintenance.</p></div><div><h3>Results and Discussion</h3><p>Efficiency rankings lacked concordance and predictive value between models, suggesting that ordinary least squares, Bayesian, or both frameworks lack utility to predict efficiency. With the exception of 1 data set, DMI was better predicted in the Bayesian framework. Estimated recovered energy (Mcal/d) in model 2 was less for cattle in quintile 1 than in quintile 5 for 4 of 7 data sets and numerically less for 6 of 7 data sets. Estimated maintenance in model 2 was less (quintiles 1 vs. 5) for 5 of 7 data sets. Substantial information existed in model 1 residuals regarding differences in composition of gain and maintenance not found in model 2 residuals.</p></div><div><h3>Implications and Applications</h3><p>Differing efficiencies between models indicate that residuals are properties of models, not cattle. Selection of cattle with less empty body fat may not be desirable from an economic standpoint.</p></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 1","pages":"Pages 40-55"},"PeriodicalIF":1.5,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000041/pdf?md5=f272ab46254dac779289d028f016091d&pid=1-s2.0-S2590286524000041-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139653015","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}
引用次数: 0
Effects of steam-flaked corn and wet distillers grains with solubles on energy metabolism of finishing beef steers* 蒸汽压片玉米和带溶质的湿蒸馏谷物对育成肉牛能量代谢的影响*
IF 1.5
Applied Animal Science Pub Date : 2024-02-01 DOI: 10.15232/aas.2023-02439
Christian H. Ponce , Jenny J. Jennings , Michael S. Brown , Beverly E. Meyer , N. Andy Cole
{"title":"Effects of steam-flaked corn and wet distillers grains with solubles on energy metabolism of finishing beef steers*","authors":"Christian H. Ponce ,&nbsp;Jenny J. Jennings ,&nbsp;Michael S. Brown ,&nbsp;Beverly E. Meyer ,&nbsp;N. Andy Cole","doi":"10.15232/aas.2023-02439","DOIUrl":"https://doi.org/10.15232/aas.2023-02439","url":null,"abstract":"<div><h3>Objective</h3><p>Wet distillers grains with solubles (WDGS) are a common feed ingredient used in cattle finishing diets. However, the NE values of WDGS have not been clearly delineated, and there may be an interaction between grain processing method and the feeding value of WDGS. This study was conducted to evaluate the relative NE values of WDGS and to evaluate possible associative effects between WDGS and steam-flaked corn (SFC) on energy and nitrogen utilization by finishing beef steers.</p></div><div><h3>Materials and Methods</h3><p>Four British crossbred steers were used in a 4 × 4 Latin square design in which steers were fed 1 of 4 diets: (1) a basal 86% concentrate diet fed a 1× maintenance (B), (2) the basal diet + SFC fed at 1.5× maintenance (B+SFC), (3) the basal diet + WDGS fed at 1.5× maintenance (B+WDGS), and (4) the basal diet + a 50:50 blend of WDGS and SFC fed at 1.5× maintenance (BLEND). Each period of the Latin square was 28 d in length with steers confined to indirect open- circuit respiration chambers the last 5 d of each period. Nutrient digestibility, urinary nutrient excretion, methane and carbon dioxide production, and heat production were determined during the last 5 d of each period. Dietary and ingredient (SFC or WDGS) TDN, DE, ME, and NE values were calculated.</p></div><div><h3>Results and Discussion</h3><p>The digestibility of DM and OM of B+SFC was greater than that of B+WDGS, with the BLEND diet being intermediate. Nitrogen balance was numerically greater for B+WDGS than for B+SFC, with BLEND being intermediate. Digestible energy, ME, and energy retention were greater for B+SFC than for B+WDGS, with BLEND being intermediate. The experi- mental method used affected the TDN, DE, ME, and NE values of diets, SFC, and WDGS. There were negative associative effects (−1% to −8.0%) between SFC and WDGS for energy values. Actual DE:TDN averaged 4.11 Mcal of DE/kg of TDN, which is less than the 4.4 value used by NASEM (2016). The DE:digestible OM ratio av- eraged 4.54 Mcal/kg, and the digestible OM:TDN ratio averaged 90.2.</p></div><div><h3>Implications and Applications</h3><p>Our results suggest that within the range of rations fed in this study, the NE values for WDGS by NASEM (2016) may overestimate their relative NE (15%) when fed in diets based on SFC.</p></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"40 1","pages":"Pages 14-28"},"PeriodicalIF":1.5,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286524000028/pdf?md5=b3395b9deb94b0f93a862ee0094e2292&pid=1-s2.0-S2590286524000028-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139653012","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}
引用次数: 0
Estimating the daily weight gain of beef stocker cattle grazing bermudagrass as affected by initial age and body condition 放牧百慕草对肉牛日增重的影响
IF 1.5
Applied Animal Science Pub Date : 2023-12-01 DOI: 10.15232/aas.2023-02428
P. Woli , C.R. Long , L.O. Tedeschi , F.M. Rouquette Jr
{"title":"Estimating the daily weight gain of beef stocker cattle grazing bermudagrass as affected by initial age and body condition","authors":"P. Woli ,&nbsp;C.R. Long ,&nbsp;L.O. Tedeschi ,&nbsp;F.M. Rouquette Jr","doi":"10.15232/aas.2023-02428","DOIUrl":"https://doi.org/10.15232/aas.2023-02428","url":null,"abstract":"<div><h3>Objective</h3><p>Our objective was to develop an age × BCS factor (ABC<sub>f</sub>) that could be used to estimate the ADG of stockers grazing bermudagrass (<em>Cynodon dactylon</em> [L.] Pers.) pasture as influenced by their age and BCS at the onset of stocking, hereafter referred to as the initial age and BCS.</p></div><div><h3>Materials and Methods</h3><p>Data on the ADG of stock- ers grazing bermudagrass in the southern United States were obtained from multiple sources, including literature, for various scenarios of initial age × BCS. Then, an ABC<sub>f</sub> for each age × BCS scenario was calculated by dividing its ADG by the ADG of calves 7 to 10 mo old with BCS of 5, a standard age × BCS scenario. Finally, an ABC<sub>f</sub> equa- tion was derived by regressing the ABC<sub>f</sub> values against the BCS values under each age group.</p></div><div><h3>Results and Discussion</h3><p>We derived the following ABC<sub>f</sub> equation to estimate the ADG of a stocker grazing bermudagrass pasture as ADG′ = ADG × ABC<sub>f</sub>, where and BCS on ADG of stockers grazing bermudagrass pas- ture. Current ADG indices or estimates do not account for the interacting effects of initial age and BCS. By incorpo- rating the ABC<sub>f</sub> into an ADG prediction system, the scien- tific community and stakeholders can more accurately as- sess the effects of these attributes on animal performance and develop appropriate purchase pricing and supplemen- tation strategies before and during stocking.</p></div>","PeriodicalId":8519,"journal":{"name":"Applied Animal Science","volume":"39 6","pages":"Pages 371-379"},"PeriodicalIF":1.5,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590286523000629/pdf?md5=588fdce55345326cfdb29d2d7f9f3776&pid=1-s2.0-S2590286523000629-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138465619","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}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信