The Professional Animal Scientist最新文献

Enteric nitrous oxide emissions from beef cattle 肉牛的肠道氧化亚氮排放

The Professional Animal Scientist Pub Date : 2018-12-01 DOI: 10.15232/PAS.2018-01769

David B. Parker, Beverly Meyer, T. Jennings, Jenny Jennings, H. Dougherty, N. Cole, Ken Casey

{"title":"Enteric nitrous oxide emissions from beef cattle","authors":"David B. Parker, Beverly Meyer, T. Jennings, Jenny Jennings, H. Dougherty, N. Cole, Ken Casey","doi":"10.15232/PAS.2018-01769","DOIUrl":"https://doi.org/10.15232/PAS.2018-01769","url":null,"abstract":"ABSTRACT Nitrous oxide (N2O) is a greenhouse gas with a higher global warming potential than carbon dioxide (CO2) or methane (CH4). The objectives of this research were to quantify enteric N2O emissions from beef cattle and determine effects of dietary nitrate (NO3) concentrations. Experiments consisted of one in vitro incubation trial and 2 live animal (LA) trials. During the in vitro trial, gas was collected from 4 forage-based and 5 corn-based diets. During the LA trials, emissions were monitored from steers in respiration chambers. In LA trial 1, 5 measurements of 256 to 720 min were conducted on a single steer within a 48-h period. In LA trial 2, measurements were conducted on 4 steers in the absence of manure. Highest in vitro N2O production was from diets containing added NO3 or alfalfa. In vitro N2O increased with dietary NO3 concentrations (r2 = 0.99), with little correlation to dietary CP (r2 = 0.17). Added NO3 decreased CH4 emissions. Mean N2O emission rates (±SD) from the LA trials were 6.93 ± 2.99 mg of N2O∙kg−1 of DMI in trial 1 and 2.20 ± 0.10 mg of N2O∙kg−1 of DMI in trial 2. Mean enteric N2O emissions accounted for 0.35% (LA trial 1) and 0.12% (LA trial 2) of CO2 equivalents. Enteric N2O emission rates were 6 to 40 times lower than values cited in earlier publications. Enteric N2O emission rates were also 58 to 108 times lower than manure emissions. Therefore, efforts to reduce greenhouse gas emissions from beef cattle should focus on enteric CH4 and manure N2O as opposed to enteric N2O.","PeriodicalId":22841,"journal":{"name":"The Professional Animal Scientist","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74463311","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: 3

Evaluation of solubles syrup from microbially enhanced soy protein production as a supplement for growing dairy heifers 微生物增强大豆蛋白生产中可溶糖浆作为生长奶牛补充物的评价

The Professional Animal Scientist Pub Date : 2018-12-01 DOI: 10.15232/PAS.2018-01756

C. Schossow, J. L. Anderson, W. Gibbons

{"title":"Evaluation of solubles syrup from microbially enhanced soy protein production as a supplement for growing dairy heifers","authors":"C. Schossow, J. L. Anderson, W. Gibbons","doi":"10.15232/PAS.2018-01756","DOIUrl":"https://doi.org/10.15232/PAS.2018-01756","url":null,"abstract":"ABSTRACT The objective of this research was to conduct a preliminary study to determine whether solubles syrup from microbially enhanced soy protein production is viable as a supplement for growing dairy heifers. A 6-wk study with a randomized complete block design was conducted using 14 Holstein and 4 Brown Swiss heifers [310 ± 16.4 d of age; BW = 337.6 ± 33 kg]. Treatments were (1) a control TMR (CON) and (2) a TMR with 6.5% microbially enhanced soy protein solubles syrup (DM basis) in partial replacement of soybean meal and corn (SYP). Both diets contained similar inclusion rates of corn silage, grass hay, and mineral mix and were balanced to be comparable in CP and energy. Heifers were fed for ad libitum intakes using a Calan gate feeding system. Frame sizes, BW, and BCS were measured every 2 wk of the feeding period, and coccygeal blood samples and rumen fluid, sampled via esophageal tube, were collected every 2 wk at 4 h after feeding. Fecal grab samples were collected in wk 6. Dry matter intake, BW, and ADG were similar between treatments. Frame measurements and BCS were similar. Rumen fermentation profiles were similar; however, ammonia-nitrogen was greater for CON. Plasma urea nitrogen concentration was greater for CON; all other blood metabolites were similar. The SYP treatment had greater NDF, DM, and OM total-tract digestibility, and there was a tendency for increased CP and ADF digestibility. Results indicate that there is potential for solubles syrup from microbially enhanced soy protein production as a protein replacement in growing heifer diets.","PeriodicalId":22841,"journal":{"name":"The Professional Animal Scientist","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88878307","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: 1

Case Study: Effect of exercise programs during receiving in a commercial feedlot on behavior and productivity of Brahman crossbred calves: Results from a commercial environment and a comparison to the research environment 案例研究:商业饲养场接收期间的锻炼计划对婆罗门杂交小牛行为和生产力的影响:来自商业环境的结果以及与研究环境的比较

The Professional Animal Scientist Pub Date : 2018-12-01 DOI: 10.15232/pas.2018-01744

Courtney L. Daigle , Amanda J. Mathias , Emily E. Ridge , Ron Gill , Tryon A. Wickersham , Jason E. Sawyer

{"title":"Case Study: Effect of exercise programs during receiving in a commercial feedlot on behavior and productivity of Brahman crossbred calves: Results from a commercial environment and a comparison to the research environment","authors":"Courtney L. Daigle , Amanda J. Mathias , Emily E. Ridge , Ron Gill , Tryon A. Wickersham , Jason E. Sawyer","doi":"10.15232/pas.2018-01744","DOIUrl":"https://doi.org/10.15232/pas.2018-01744","url":null,"abstract":"<div>Exercising receiving cattle is hypothesized to be a management strategy that could mitigate receiving stress in cattle. Little empirical research has been published on the quantifiable (productivity, health, behavior) effects of this strategy in a commercial feedyard setting. In a single Texas feedyard case study, high-risk Brahman-crossbred receiving calves (n = 688; 184 ± 5 kg) were exercised during the receiving period in the fall. Upon arrival, calves were sorted into single-sex pens (n = 6 pens: n = 3 pens heifers, n = 3 pens steers) and randomly assigned to 1 of 3 treatments within sex blocks: (1) programmatic exercise (PRO; cattle moved to drive alley and encouraged to maintain movement for 20 min), (2) free exercise (FRE; cattle moved to drive alley and allowed free movement without access to the pen for 60 min), or (3) no exercise (CON). Treatments were applied (n = 12 sessions; 3 sessions per week) across a 30-d period, between 0800 and 1000 h at least 1 h after feed delivery. Gain-to-feed ratio and mortality rate were similar among treatments. Cattle assigned to CON had greater ADG than did those assigned to FRE or PRO (1.52, 1.39, and 1.44 kg/d). Percentage of calves treated for respiratory disease was greater in FRE and PRO compared with CON. The proportion of the pen lying and resting simultaneously increased and the proportion of the pen feeding, drinking, ruminating, and walking decreased over time. Exercise treatments did not compromise gain efficiency or behavior; however, exercised cattle had smaller ADG. These results suggest that exercise reduces receiving-period gains without improving animal health or altering behaviors.</div>","PeriodicalId":22841,"journal":{"name":"The Professional Animal Scientist","volume":"34 6","pages":"Pages 653-663"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15232/pas.2018-01744","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91744086","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: 8

Effects of injectable trace minerals on reproductive performance of beef heifers in adequate trace mineral status 微量元素注射对微量元素充足状态下肉牛繁殖性能的影响

The Professional Animal Scientist Pub Date : 2018-12-01 DOI: 10.15232/pas.2018-01752

S.A. Springman , J.G. Maddux , M.E. Drewnoski , R.N. Funston PAS

{"title":"Effects of injectable trace minerals on reproductive performance of beef heifers in adequate trace mineral status","authors":"S.A. Springman , J.G. Maddux , M.E. Drewnoski , R.N. Funston PAS","doi":"10.15232/pas.2018-01752","DOIUrl":"https://doi.org/10.15232/pas.2018-01752","url":null,"abstract":"<div>Red Angus–based, May-born heifers (n = 799) at 2 locations (Maddux Ranches, Wauneta, NE) were used to evaluate an injectable trace mineral on reproductive performance. Following October weaning, heifers were backgrounded in a feedlot until reaching a BW of 295 kg and then moved to native range at location 1 (n = 125) or location 2 (n = 286) in early March. Additional heifers (n = 388) grazed corn residue with cows, weaned in April, and were backgrounded until reaching 295 kg and then transported to locations 1 and 2 by early June. Free-choice mineral was available at both locations. Initial liver mineral status before treatment (n = 22; 307 kg) was adequate and not different (P > 0.26) among winter locations (copper = 146 μg/g, manganese = 9.22 μg/g, selenium = 1.54 μg/g, and zinc = 115 μg/g). Heifers were synchronized with a 14-d controlled internal drug-release (CIDR) timed-AI protocol and injected with a trace mineral (5 mL, Multimin 90; MM, n = 399) or not (CON, n = 400) at CIDR insertion. Bulls were with heifers on range 60 d following AI. The proportion of heifers pregnant within the first 21 d was not different (P = 0.32; 69 vs. 62 ± 3%; CON vs. MM) nor were those pregnant within 33 d (P = 0.57; 86 vs. 77 ± 2%; CON vs. MM) or overall pregnancy rates (P = 0.38; 95 vs. 93 ± 1%; CON vs. MM). Injectable trace mineral 33 d before AI did not influence reproductive performance in heifers with adequate trace mineral status.</div>","PeriodicalId":22841,"journal":{"name":"The Professional Animal Scientist","volume":"34 6","pages":"Pages 649-652"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15232/pas.2018-01752","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91744087","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: 4

Evaluation of solubles syrup from microbially enhanced soy protein production as a supplement for growing dairy heifers 微生物增强大豆蛋白生产中可溶糖浆作为生长奶牛补充物的评价

The Professional Animal Scientist Pub Date : 2018-12-01 DOI: 10.15232/pas.2018-01756

C.R. Schossow , J.L. Anderson , W.R. Gibbons

{"title":"Evaluation of solubles syrup from microbially enhanced soy protein production as a supplement for growing dairy heifers","authors":"C.R. Schossow , J.L. Anderson , W.R. Gibbons","doi":"10.15232/pas.2018-01756","DOIUrl":"https://doi.org/10.15232/pas.2018-01756","url":null,"abstract":"<div>The objective of this research was to conduct a preliminary study to determine whether solubles syrup from microbially enhanced soy protein production is viable as a supplement for growing dairy heifers. A 6-wk study with a randomized complete block design was conducted using 14 Holstein and 4 Brown Swiss heifers [310 ± 16.4 d of age; BW = 337.6 ± 33 kg]. Treatments were (1) a control TMR (CON) and (2) a TMR with 6.5% microbially enhanced soy protein solubles syrup (DM basis) in partial replacement of soybean meal and corn (SYP). Both diets contained similar inclusion rates of corn silage, grass hay, and mineral mix and were balanced to be comparable in CP and energy. Heifers were fed for ad libitum intakes using a Calan gate feeding system. Frame sizes, BW, and BCS were measured every 2 wk of the feeding period, and coccygeal blood samples and rumen fluid, sampled via esophageal tube, were collected every 2 wk at 4 h after feeding. Fecal grab samples were collected in wk 6. Dry matter intake, BW, and ADG were similar between treatments. Frame measurements and BCS were similar. Rumen fermentation profiles were similar; however, ammonia-nitrogen was greater for CON. Plasma urea nitrogen concentration was greater for CON; all other blood metabolites were similar. The SYP treatment had greater NDF, DM, and OM total-tract digestibility, and there was a tendency for increased CP and ADF digestibility. Results indicate that there is potential for solubles syrup from microbially enhanced soy protein production as a protein replacement in growing heifer diets.</div>","PeriodicalId":22841,"journal":{"name":"The Professional Animal Scientist","volume":"34 6","pages":"Pages 608-617"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15232/pas.2018-01756","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91744515","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: 1

Enteric nitrous oxide emissions from beef cattle1 肉牛的肠道氧化亚氮排放

The Professional Animal Scientist Pub Date : 2018-12-01 DOI: 10.15232/pas.2018-01769

David B. Parker , Beverly Meyer , Tracy Jennings , Jenny Jennings , Holland Dougherty , N. Andy Cole PAS , Ken Casey

{"title":"Enteric nitrous oxide emissions from beef cattle1","authors":"David B. Parker , Beverly Meyer , Tracy Jennings , Jenny Jennings , Holland Dougherty , N. Andy Cole PAS , Ken Casey","doi":"10.15232/pas.2018-01769","DOIUrl":"https://doi.org/10.15232/pas.2018-01769","url":null,"abstract":"<div>Nitrous oxide (N2O) is a greenhouse gas with a higher global warming potential than carbon dioxide (CO2) or methane (CH4). The objectives of this research were to quantify enteric N2O emissions from beef cattle and determine effects of dietary nitrate (NO3) concentrations. Experiments consisted of one in vitro incubation trial and 2 live animal (LA) trials. During the in vitro trial, gas was collected from 4 forage-based and 5 corn-based diets. During the LA trials, emissions were monitored from steers in respiration chambers. In LA trial 1, 5 measurements of 256 to 720 min were conducted on a single steer within a 48-h period. In LA trial 2, measurements were conducted on 4 steers in the absence of manure. Highest in vitro N2O production was from diets containing added NO3 or alfalfa. In vitro N2O increased with dietary NO3 concentrations (r2 = 0.99), with little correlation to dietary CP (r2 = 0.17). Added NO3 decreased CH4 emissions. Mean N2O emission rates (±SD) from the LA trials were 6.93±2.99 mg of N2O∙kg−1 of DMI in trial 1 and 2.20±0.10 mg of N2O∙kg−1 of DMI in trial 2. Mean enteric N2O emissions accounted for 0.35% (LA trial 1) and 0.12% (LA trial 2) of CO2 equivalents. Enteric N2O emission rates were 6 to 40 times lower than values cited in earlier publications. Enteric N2O emission rates were also 58 to 108 times lower than manure emissions. Therefore, efforts to reduce greenhouse gas emissions from beef cattle should focus on enteric CH4 and manure N2O as opposed to enteric N2O.</div>","PeriodicalId":22841,"journal":{"name":"The Professional Animal Scientist","volume":"34 6","pages":"Pages 594-607"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15232/pas.2018-01769","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91744516","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: 3

Influence of small doses of gonadotropin-releasing hormone following controlled internal drug-release insert removal on reproductive parameters in beef cattle subjected to a fixed-time artificial insemination protocol 小剂量促性腺激素释放激素对定时人工授精肉牛生殖参数的影响

The Professional Animal Scientist Pub Date : 2018-12-01 DOI: 10.15232/PAS.2018-01787

J. Rich, E. Northrop, S. Perkins, G. Perry

引用次数: 1

Evaluation of the safety of an algal biomass as an ingredient for finishing cattle 一种藻类生物质作为育肥牛原料的安全性评价

The Professional Animal Scientist Pub Date : 2018-12-01 DOI: 10.15232/pas.2018-01774

M.M. Norman PAS , Z.E. Carlson PAS , F.H. Hilscher PAS , G.E. Erickson PAS , B.W. Brodersen , J.D. Loy , J.W. Wilson , C. Rabe , A.K. Watson

{"title":"Evaluation of the safety of an algal biomass as an ingredient for finishing cattle","authors":"M.M. Norman PAS , Z.E. Carlson PAS , F.H. Hilscher PAS , G.E. Erickson PAS , B.W. Brodersen , J.D. Loy , J.W. Wilson , C. Rabe , A.K. Watson","doi":"10.15232/pas.2018-01774","DOIUrl":"https://doi.org/10.15232/pas.2018-01774","url":null,"abstract":"<div>Coproducts of n-3 fatty acid production from algae are a potential feed resource for cattle. A study was conducted evaluating feeding algal biomass to cattle. Crossbred cattle (20 steers and 20 heifers, 255 kg initial BW, SD = 14) were individually fed 4 inclusions of condensed algal residue solubles (CARS; 0, 2.5, 5, 7.5% of diet DM) displacing dry-rolled corn in the finishing diet for a minimum of 97 d. Increasing CARS inclusion in the diet quadratically increased DMI and ADG (P ≤ 0.01) and linearly increased G:F (P < 0.01), NEm, and NEg. Out of 27 organs measured, 6 had differences due to treatment in absolute weight and weight as a percentage of BW. Weight of the liver, pancreas, jejunum, and heart linearly increased (P ≤ 0.05) and weight of the thyroid and gall bladder quadratically increased (P ≤ 0.04) as CARS inclusion in the diet increased. However, organ weights were all within expected ranges, and histopathology analysis of organs revealed no differences due to treatment (P ≥ 0.24). Hemoglobin and hematocrit concentrations quadratically decreased (P = 0.05) and red blood cell distribution width linearly increased (P = 0.02) as CARS inclusion increased; no other differences were observed for hematology measures (P ≥ 0.11). Out of 21 blood chemistry measures, 8 were affected by treatment (P ≤ 0.02). Inclusion of up to 7.5% of diet DM as CARS had no adverse effect on cattle and improved performance when fed up to 5.0% of the diet DM.</div>","PeriodicalId":22841,"journal":{"name":"The Professional Animal Scientist","volume":"34 6","pages":"Pages 618-630"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15232/pas.2018-01774","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91744082","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: 1

Influence of small doses of gonadotropin-releasing hormone following controlled internal drug-release insert removal on reproductive parameters in beef cattle subjected to a fixed-time artificial insemination protocol 小剂量促性腺激素释放激素对定时人工授精肉牛生殖参数的影响

The Professional Animal Scientist Pub Date : 2018-12-01 DOI: 10.15232/pas.2018-01787

Jerica J.J. Rich, Emmalee J. Northrop, Stephanie D. Perkins, George A. Perry PAS

{"title":"Influence of small doses of gonadotropin-releasing hormone following controlled internal drug-release insert removal on reproductive parameters in beef cattle subjected to a fixed-time artificial insemination protocol","authors":"Jerica J.J. Rich, Emmalee J. Northrop, Stephanie D. Perkins, George A. Perry PAS","doi":"10.15232/pas.2018-01787","DOIUrl":"https://doi.org/10.15232/pas.2018-01787","url":null,"abstract":"<div>Heifers and cows that exhibit estrus before fixed-time AI have increased concentrations of estradiol and greater conception rates compared with those that do not. Our objective was to determine whether small doses of gonadotropin-releasing hormone following controlled internal drug-release insert removal would affect estradiol concentrations, estrus expression, or pregnancy success. Beef cattle (n = 247) were synchronized using the 7-d CO-Synch+CIDR protocol and assigned to 1 of 3 treatment groups (0 μg,10 μg, or 5 + 5 μg of gonadotropin-releasing hormone). Animals were observed for estrus, blood samples were collected, and animals were bred by appointment. Concentrations of estradiol were influenced by time (P < 0.0001) but not by treatment (P = 0.52) or a treatment-by-time interaction (P = 0.68). Estrus was not influenced by age (P = 0.36), treatment (P = 0.92), or a treatment-by-age interaction (P = 0.58). Conception rates were influenced by estrus (P < 0.01), treatment (P = 0.04), and a treatment-by-estrus (P < 0.01) interaction but were not influenced by age (P = 0.27), treatment by age (P = 0.84), or treatment by estrus by age (P = 0.94). Animals administered 5 + 5 μg had increased conception rates (P = 0.01; 69 ± 6%) compared with animals administered 10 μg and tended to be increased (P = 0.11) compared with 0 μg, which did not differ from 10 μg (53 ± 6% vs. 42 ± 8%, respectively). In conclusion, 5 + 5 μg did not affect concentrations of estradiol or estrus expression but did improve conception to AI.</div>","PeriodicalId":22841,"journal":{"name":"The Professional Animal Scientist","volume":"34 6","pages":"Pages 566-570"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.15232/pas.2018-01787","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91744538","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 field pea supplementation on digestibility and rumen volatile fatty acid concentrations of beef-cattle diets containing high and low quality forages 饲粮中添加豌豆对优质和劣质饲料肉牛消化率和瘤胃挥发性脂肪酸浓度的影响

The Professional Animal Scientist Pub Date : 2018-12-01 DOI: 10.15232/PAS.2018-01730

H. Greenwell, J. Gramkow, M. Jolly-Breithaupt, J. MacDonald, K. Jenkins

引用次数: 3