Meta-analysis of the effect of glycerin inclusion in dairy cattle diet on milk fatty acid profile
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1093/tas/txab012 http://hdl.handle.net/11449/208623 |
Resumo: | The use of glycerin in diets for dairy cows initially emerged as an alternative for the prevention and control of ketosis. However, despite some controversy, there are still several studies associating glycerin with increases in daily milk yield, with possible changes in its constituents. Therefore, the objective of this study was to evaluate, using a meta-analysis approach, the effect of glycerin inclusion in dairy cow diets on milk fatty acid. Twenty-two peer-reviewed publications with 66 treatment means were included in data set. The effect of glycerin inclusion in diet (treatment) were evaluated using random-effect models to examine the weighted mean differences (WMD) between a control diet (without glycerin in the diet) and the treatment diet. Heterogeneity was explored by meta-regression and subgroup analysis performed for: genetic type; days in milk; experimental period; glycerin in diet; glycerin type and concentrate in diet. Inclusion of glycerin in the diet increased the digestibility of dry matter and protein, as well as ruminal propionate. It did not affect dry matter intake (P = 0.351) and milk yield (P = 0.730). The effect of glycerin inclusion on the milk fat yield is dependent on the genetic group, in which Holstein (WMD = -0.04 kg/d; P = 0.010) and Holstein-crossbreed (WMD = -0.10 kg/d; P < 0.0001) cows produced less fat in milk compared to Jersey cows, when glycerin was included in the diets. Glycine inclusions of up to 100 g/kg in the diet of dairy cows did not negatively affect milk production and composition. However, inclusions above 150 g/kg of glycerin in the diet reduced the concentration of fat, and of unsaturated, monounsaturated, polyunsaturated fatty acids and conjugated linoleic acid (CLA C18: 2 cis-9 and trans-11) in milk. The results reported in our meta-analysis does not demonstrate the effectiveness of glycerin in improving the composition of milk and a group of fatty acids of importance for human health such as C18: 2 cis-9, trans-11 CLA. |
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Meta-analysis of the effect of glycerin inclusion in dairy cattle diet on milk fatty acid profilebiodieselfat milkfatty acidglycerolThe use of glycerin in diets for dairy cows initially emerged as an alternative for the prevention and control of ketosis. However, despite some controversy, there are still several studies associating glycerin with increases in daily milk yield, with possible changes in its constituents. Therefore, the objective of this study was to evaluate, using a meta-analysis approach, the effect of glycerin inclusion in dairy cow diets on milk fatty acid. Twenty-two peer-reviewed publications with 66 treatment means were included in data set. The effect of glycerin inclusion in diet (treatment) were evaluated using random-effect models to examine the weighted mean differences (WMD) between a control diet (without glycerin in the diet) and the treatment diet. Heterogeneity was explored by meta-regression and subgroup analysis performed for: genetic type; days in milk; experimental period; glycerin in diet; glycerin type and concentrate in diet. Inclusion of glycerin in the diet increased the digestibility of dry matter and protein, as well as ruminal propionate. It did not affect dry matter intake (P = 0.351) and milk yield (P = 0.730). The effect of glycerin inclusion on the milk fat yield is dependent on the genetic group, in which Holstein (WMD = -0.04 kg/d; P = 0.010) and Holstein-crossbreed (WMD = -0.10 kg/d; P < 0.0001) cows produced less fat in milk compared to Jersey cows, when glycerin was included in the diets. Glycine inclusions of up to 100 g/kg in the diet of dairy cows did not negatively affect milk production and composition. However, inclusions above 150 g/kg of glycerin in the diet reduced the concentration of fat, and of unsaturated, monounsaturated, polyunsaturated fatty acids and conjugated linoleic acid (CLA C18: 2 cis-9 and trans-11) in milk. The results reported in our meta-analysis does not demonstrate the effectiveness of glycerin in improving the composition of milk and a group of fatty acids of importance for human health such as C18: 2 cis-9, trans-11 CLA.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Animal Unit of Digestive and Metabolic Studies Department of Animal Science School of Agricultural and Veterinarian Sciences São Paulo State University (UNESP)Department of Animal Science Federal University of Espírito SantoAnimal Unit of Digestive and Metabolic Studies Department of Animal Science School of Agricultural and Veterinarian Sciences São Paulo State University (UNESP)Universidade Estadual Paulista (Unesp)Federal University of Espírito SantoTorres, Rodrigo N. S. [UNESP]Bertoco, João P. A. [UNESP]De Arruda, Maria C. G. [UNESP]Rodrigues, Julia L. [UNESP]Coelho, Larissa M. [UNESP]Paschoaloto, Josimari R. [UNESP]De Almeida Júnior, Gercílio A.Ezequiel, Jane M. B. [UNESP]Almeida, Marco T. C.2021-06-25T11:15:10Z2021-06-25T11:15:10Z2021-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1093/tas/txab012Translational Animal Science, v. 5, n. 1, 2021.2573-2102http://hdl.handle.net/11449/20862310.1093/tas/txab0122-s2.0-85104955633Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengTranslational Animal Scienceinfo:eu-repo/semantics/openAccess2024-06-07T18:45:08Zoai:repositorio.unesp.br:11449/208623Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-06T00:03:02.192754Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Meta-analysis of the effect of glycerin inclusion in dairy cattle diet on milk fatty acid profile |
title |
Meta-analysis of the effect of glycerin inclusion in dairy cattle diet on milk fatty acid profile |
spellingShingle |
Meta-analysis of the effect of glycerin inclusion in dairy cattle diet on milk fatty acid profile Torres, Rodrigo N. S. [UNESP] biodiesel fat milk fatty acid glycerol |
title_short |
Meta-analysis of the effect of glycerin inclusion in dairy cattle diet on milk fatty acid profile |
title_full |
Meta-analysis of the effect of glycerin inclusion in dairy cattle diet on milk fatty acid profile |
title_fullStr |
Meta-analysis of the effect of glycerin inclusion in dairy cattle diet on milk fatty acid profile |
title_full_unstemmed |
Meta-analysis of the effect of glycerin inclusion in dairy cattle diet on milk fatty acid profile |
title_sort |
Meta-analysis of the effect of glycerin inclusion in dairy cattle diet on milk fatty acid profile |
author |
Torres, Rodrigo N. S. [UNESP] |
author_facet |
Torres, Rodrigo N. S. [UNESP] Bertoco, João P. A. [UNESP] De Arruda, Maria C. G. [UNESP] Rodrigues, Julia L. [UNESP] Coelho, Larissa M. [UNESP] Paschoaloto, Josimari R. [UNESP] De Almeida Júnior, Gercílio A. Ezequiel, Jane M. B. [UNESP] Almeida, Marco T. C. |
author_role |
author |
author2 |
Bertoco, João P. A. [UNESP] De Arruda, Maria C. G. [UNESP] Rodrigues, Julia L. [UNESP] Coelho, Larissa M. [UNESP] Paschoaloto, Josimari R. [UNESP] De Almeida Júnior, Gercílio A. Ezequiel, Jane M. B. [UNESP] Almeida, Marco T. C. |
author2_role |
author author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Federal University of Espírito Santo |
dc.contributor.author.fl_str_mv |
Torres, Rodrigo N. S. [UNESP] Bertoco, João P. A. [UNESP] De Arruda, Maria C. G. [UNESP] Rodrigues, Julia L. [UNESP] Coelho, Larissa M. [UNESP] Paschoaloto, Josimari R. [UNESP] De Almeida Júnior, Gercílio A. Ezequiel, Jane M. B. [UNESP] Almeida, Marco T. C. |
dc.subject.por.fl_str_mv |
biodiesel fat milk fatty acid glycerol |
topic |
biodiesel fat milk fatty acid glycerol |
description |
The use of glycerin in diets for dairy cows initially emerged as an alternative for the prevention and control of ketosis. However, despite some controversy, there are still several studies associating glycerin with increases in daily milk yield, with possible changes in its constituents. Therefore, the objective of this study was to evaluate, using a meta-analysis approach, the effect of glycerin inclusion in dairy cow diets on milk fatty acid. Twenty-two peer-reviewed publications with 66 treatment means were included in data set. The effect of glycerin inclusion in diet (treatment) were evaluated using random-effect models to examine the weighted mean differences (WMD) between a control diet (without glycerin in the diet) and the treatment diet. Heterogeneity was explored by meta-regression and subgroup analysis performed for: genetic type; days in milk; experimental period; glycerin in diet; glycerin type and concentrate in diet. Inclusion of glycerin in the diet increased the digestibility of dry matter and protein, as well as ruminal propionate. It did not affect dry matter intake (P = 0.351) and milk yield (P = 0.730). The effect of glycerin inclusion on the milk fat yield is dependent on the genetic group, in which Holstein (WMD = -0.04 kg/d; P = 0.010) and Holstein-crossbreed (WMD = -0.10 kg/d; P < 0.0001) cows produced less fat in milk compared to Jersey cows, when glycerin was included in the diets. Glycine inclusions of up to 100 g/kg in the diet of dairy cows did not negatively affect milk production and composition. However, inclusions above 150 g/kg of glycerin in the diet reduced the concentration of fat, and of unsaturated, monounsaturated, polyunsaturated fatty acids and conjugated linoleic acid (CLA C18: 2 cis-9 and trans-11) in milk. The results reported in our meta-analysis does not demonstrate the effectiveness of glycerin in improving the composition of milk and a group of fatty acids of importance for human health such as C18: 2 cis-9, trans-11 CLA. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-06-25T11:15:10Z 2021-06-25T11:15:10Z 2021-01-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1093/tas/txab012 Translational Animal Science, v. 5, n. 1, 2021. 2573-2102 http://hdl.handle.net/11449/208623 10.1093/tas/txab012 2-s2.0-85104955633 |
url |
http://dx.doi.org/10.1093/tas/txab012 http://hdl.handle.net/11449/208623 |
identifier_str_mv |
Translational Animal Science, v. 5, n. 1, 2021. 2573-2102 10.1093/tas/txab012 2-s2.0-85104955633 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Translational Animal Science |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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_version_ |
1808129576846491648 |