دورية أكاديمية
أعرض في EDS

Comparison of microbial fermentation data from dual-flow continuous culture system and omasal sampling technique: A meta-analytical approach.

التفاصيل البيبلوغرافية
العنوان: Comparison of microbial fermentation data from dual-flow continuous culture system and omasal sampling technique: A meta-analytical approach.
المؤلفون: Brandao VLN; Department of Animal Sciences, University of Florida, Gainesville 32611., Marcondes MI; Department of Animal Science, Federal University of Viçosa, Viçosa, MG, Brazil, 36570900., Faciola AP; Department of Animal Sciences, University of Florida, Gainesville 32611. Electronic address: afaciola@ufl.edu.
المصدر: Journal of dairy science [J Dairy Sci] 2020 Mar; Vol. 103 (3), pp. 2347-2362. Date of Electronic Publication: 2020 Jan 15.
نوع المنشور: Comparative Study; Journal Article; Meta-Analysis
اللغة: English
بيانات الدورية: Publisher: American Dairy Science Association Country of Publication: United States NLM ID: 2985126R Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1525-3198 (Electronic) Linking ISSN: 00220302 NLM ISO Abbreviation: J Dairy Sci Subsets: MEDLINE
أسماء مطبوعة: Publication: Champaign, IL : American Dairy Science Association
Original Publication: Lancaster, Pa. [etc.]
مواضيع طبية MeSH: Carbohydrate Metabolism*, Cattle/*metabolism , Dietary Fiber/*metabolism , Nitrogen/*metabolism, Animal Feed/analysis ; Animals ; Culture Techniques ; Diet/veterinary ; Digestion ; Fatty Acids, Volatile/metabolism ; Female ; Fermentation ; Omasum/metabolism ; Omasum/microbiology ; Rumen/metabolism ; Rumen/microbiology
مستخلص: Although the omasal sampling technique (OST) has been successfully used to estimate ruminal fermentation and nutrient flow, alternatives to invasive animal trials should be pursued and evaluated. The objective of this study was to evaluate carbohydrate and N metabolisms using a meta-analytical approach to compare 2 methods: dual-flow continuous culture system (DFCCS) and OST. To be included, studies needed to report diet chemical composition and report at least 1 of the dependent variables of interest. A total of 155 articles were included, in which 97 used the DFCCS and 58 used the OST. The independent variables used were dietary nonfiber carbohydrate concentration, neutral detergent fiber (NDF) degradability, true crude protein (CP) degradability, and efficiency of microbial protein synthesis (EMPS). In addition, 12 dependent variables were used. Statistical analyses were performed using the Mixed procedure of SAS (SAS Institute Inc., Cary, NC). A random coefficients model was used considering study as a random effect and including the possibility of covariance between the slope and the intercept. The effect of method (DFCCS or OST) was included and tested in the estimates of the intercept, linear, and quadratic effects of the independent variable. There was no method effect when NDF degradability was regressed with total volatile fatty acids concentration, true CP degradability, and EMPS. Molar proportions of acetate and propionate were quadratically associated with NDF degradability. When NDF degradability was regressed with acetate and propionate there was a method effect, differing only in the intercept (β 0 ) estimate. True organic matter digestibility, bacterial N/total N, efficiency of N utilization, total volatile fatty acid concentration, and molar proportion of butyrate linearly increased as dietary nonfiber carbohydrate concentration increased, and none of these variables were affected by method. Concentration of ammonia N had a linear and positive association with true CP degradability. This was the only variable that had a method effect when regressed with true CP degradability, differing only in the estimate of the intercept (β 0 ). As EMPS increased, efficiency of N utilization also increased, and it was affected by method. Overall, the majority of DFCCS responses were similar to OST. When a method effect was observed, it was mainly on the estimate of the intercept, demonstrating that the magnitude of these responses was different. However, the relationships between independent and dependent variables were similar across methods.
(The Authors. Published by FASS Inc. and Elsevier Inc. on behalf of the American Dairy Science Association®. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).)
فهرسة مساهمة: Keywords: in vitro; nutrient flow; omasum; rumen
المشرفين على المادة: 0 (Dietary Fiber)
0 (Fatty Acids, Volatile)
N762921K75 (Nitrogen)
تواريخ الأحداث: Date Created: 20200120 Date Completed: 20200605 Latest Revision: 20200605
رمز التحديث: 20231215
DOI: 10.3168/jds.2019-17107
PMID: 31954580
قاعدة البيانات: MEDLINE
الوصف
تدمد:1525-3198
DOI:10.3168/jds.2019-17107