dor_id: 4122059

506.#.#.a: Público

590.#.#.d: Los artículos enviados a la revista "Veterinaria México OA", se juzgan por medio de un proceso de revisión por pares

510.0.#.a: Consejo Nacional de Ciencia y Tecnología (CONACyT); Sistema Regional de Información en Línea para Revistas Científicas de América Latina, el Caribe, España y Portugal (Latindex); Scientific Electronic Library Online (SciELO); Bibliografía Latinoamericana (Biblat); La Red de Revistas Científicas de América Latina y el Caribe, España y Portugal (Redalyc); Connecting research and researchers (ORCiD)

561.#.#.u: https://www.fmvz.unam.mx/

650.#.4.x: Biotecnología y Ciencias Agropecuarias

336.#.#.b: article

336.#.#.3: Artículo de Investigación

336.#.#.a: Artículo

351.#.#.6: https://veterinariamexico.fmvz.unam.mx/index.php/vet/index

351.#.#.b: Veterinaria México OA

351.#.#.a: Artículos

harvesting_group: RevistasUNAM

270.1.#.p: Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

590.#.#.c: Open Journal Systems (OJS)

270.#.#.d: MX

270.1.#.d: México

590.#.#.b: Concentrador

883.#.#.u: https://revistas.unam.mx/catalogo/

883.#.#.a: Revistas UNAM

590.#.#.a: Coordinación de Difusión Cultural

883.#.#.1: https://www.publicaciones.unam.mx/

883.#.#.q: Dirección General de Publicaciones y Fomento Editorial

850.#.#.a: Universidad Nacional Autónoma de México

856.4.0.u: https://veterinariamexico.fmvz.unam.mx/index.php/vet/article/view/562/674

100.1.#.a: Sanchez Duarte, Juan Isidro; Garcia, Alvaro; Rodríguez Hernández, Karla; Reta Sánchez, David G.; Salinas Gonzalez, Homero; Ochoa Martínez, Esmeralda; Reyes González, Arturo

524.#.#.a: Sanchez Duarte, Juan Isidro, et al. (2020). Production response in dairy cows milked two or three times a day: A meta-analysis. Veterinaria México OA; Vol. 7 Núm. 2, 2020. Recuperado de https://repositorio.unam.mx/contenidos/4122059

245.1.0.a: Production response in dairy cows milked two or three times a day: A meta-analysis

502.#.#.c: Universidad Nacional Autónoma de México

561.1.#.a: Facultad de Medicina Veterinaria y Zootecnia, UNAM

264.#.0.c: 2020

264.#.1.c: 2020-06-24

653.#.#.a: milking frequency; milk yield; milk composition; heterogeneity; effect size

506.1.#.a: La titularidad de los derechos patrimoniales de esta obra pertenece a las instituciones editoras. Su uso se rige por una licencia Creative Commons BY 4.0 Internacional, https://creativecommons.org/licenses/by/4.0/legalcode.es, para un uso diferente consultar al responsable jurídico del repositorio por medio del correo electrónico vetmexicooa@gmail.com

884.#.#.k: https://veterinariamexico.fmvz.unam.mx/index.php/vet/article/view/562

001.#.#.#: 131.oai:ojs.pkp.sfu.ca:article/562

041.#.7.h: eng

520.3.#.a: The objective was to evaluate the effects of two (2×) vs three (3×) times per day milking on milk production and milk composition in dairy cows. fourteen scientific papers, containing production data from 16 trials, where dairy cows were milked 2× or 3×, were analysed using meta-analysis with fixed and random-effects with the r statistical program. The degree of heterogeneity and publication bias were measured with the i2 statistic and begg’s test, respectively. in addition, the meta-regression analysis explored other sources of heterogeneity for the response. The estimated effect size of 2× and 3× milkings was calculated for dry matter intake (dmi), milk production, and milk composition. dry matter intake, milk production, and milk fat and protein yields showed substantial heterogeneity (i2>50%). whereas milk fat-percentage had moderate heterogeneity (i2<50%), and milk protein had no (i2=0%)heterogeneity. The year of publication, trial duration, and cattle breed did not influence production response parameters to milking frequency. we found no evidence of publication bias for the parameters evaluated (begg’s test; p>.05). cows milked 2× produced less milk (2.23 kg/d), less milk fat (0.06kg/d), and less milk protein (0.05 kg/d). in contrast, the fat percentage was lower (0.07 units) in 3×, compared with 2× milking frequency. Therewas no effect of milking frequency on dmi and milk protein percentage. in conclusion, milk production and milk fat and protein yields improves as milking frequency increase from 2× to 3× daily, without affecting dmi. The implementation of 3× milking frequency must consider dairy cow management, labor, and milking parlour infrastructure, particular to each dairy farm.

773.1.#.t: Veterinaria México OA; Vol. 7 Núm. 2 (2020)

773.1.#.o: https://veterinariamexico.fmvz.unam.mx/index.php/vet/index

022.#.#.a: ISSN electrónico: 2448-6760

310.#.#.a: Trimestral

264.#.1.b: Facultad de Medicina Veterinaria y Zootecnia, UNAM

doi: https://doi.org/10.22201/fmvz.24486760e.2020.2.562

harvesting_date: 2023-11-08 13:10:00.0

856.#.0.q: application/pdf

file_creation_date: 2020-06-25 22:00:01.0

file_modification_date: 2020-06-25 22:25:26.0

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last_modified: 2024-03-19 14:00:00

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