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Implications of Organic Dairy Management on Herd Performance and Milk Fatty Acid Profiles and Interactions with Season

Interest in organic cows’ milk has increased due to the perceived superior nutritional quality and improved sustainability and animal welfare. However, there is a lack of simultaneous assessments on the influence of organic dairy practices and dietary and breed drivers on productivity, feed efficien...

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Autores principales: Ormston, Sabrina, Qin, Nanbing, Faludi, Gergely, Pitt, Joe, Gordon, Alan W., Theodoridou, Katerina, Yan, Tianhai, Huws, Sharon A., Stergiadis, Sokratis
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10138061/
https://www.ncbi.nlm.nih.gov/pubmed/37107384
http://dx.doi.org/10.3390/foods12081589
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author Ormston, Sabrina
Qin, Nanbing
Faludi, Gergely
Pitt, Joe
Gordon, Alan W.
Theodoridou, Katerina
Yan, Tianhai
Huws, Sharon A.
Stergiadis, Sokratis
author_facet Ormston, Sabrina
Qin, Nanbing
Faludi, Gergely
Pitt, Joe
Gordon, Alan W.
Theodoridou, Katerina
Yan, Tianhai
Huws, Sharon A.
Stergiadis, Sokratis
author_sort Ormston, Sabrina
collection PubMed
description Interest in organic cows’ milk has increased due to the perceived superior nutritional quality and improved sustainability and animal welfare. However, there is a lack of simultaneous assessments on the influence of organic dairy practices and dietary and breed drivers on productivity, feed efficiency, health parameters, and nutritional milk quality at the herd level. This work aimed to assess the impact of organic vs. conventional management and month on milk yield and basic composition, herd feed efficiency, health parameters, and milk fatty acid (FA) composition. Milk samples (n = 800) were collected monthly from the bulk tanks of 67 dairy farms (26 organic and 41 conventional) between January and December 2019. Data on breed and feeding practices were gathered via farm questionnaires. The samples were analyzed for their basic composition and FA profile using Fourier transform infrared spectroscopy (FTIR) and gas chromatography (GC), respectively. The data were analyzed using a linear mixed model, repeated measures design and multivariate redundancy analysis (RDA). The conventional farms had higher yields (kg/cow per day) of milk (+7.3 kg), fat (+0.27 kg), and protein (+0.25 kg) and higher contents (g/kg milk) of protein, casein, lactose, and urea. The conventional farms produced more milk (+0.22 kg), fat (+8.6 g), and protein (+8.1 g) per kg offered dry matter (DM). The organic farms produced more milk per kg of offered non-grazing and concentrate DM offered, respectively (+0.5 kg and +1.23 kg), and fat (+20.1 g and +51 g) and protein (+17 g and +42 g). The organic milk had a higher concentration of saturated fatty acid (SFA; +14 g/kg total FA), polyunsaturated fatty acid (PUFA; +2.4 g/kg total FA), and nutritionally beneficial FA alpha linolenic acid (ALNA; +14 g/kg total FA), rumenic acid (RA; +14 g/kg total FA), and eicosapentaenoic acid (EPA; +14 g/kg total FA); the conventional milk had higher concentrations of monounsaturated FA (MUFA; +16 g/kg total FA). Although the conventional farms were more efficient in converting the overall diet into milk, fat, and protein, the organic farms showed better efficiency in converting conserved forages and concentrates into milk, fat, and protein as a result of reduced concentrate feeding. Considering the relatively small differences in the FA profiles between the systems, increased pasture intake can benefit farm sustainability without negatively impacting consumer nutrition and health.
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spelling pubmed-101380612023-04-28 Implications of Organic Dairy Management on Herd Performance and Milk Fatty Acid Profiles and Interactions with Season Ormston, Sabrina Qin, Nanbing Faludi, Gergely Pitt, Joe Gordon, Alan W. Theodoridou, Katerina Yan, Tianhai Huws, Sharon A. Stergiadis, Sokratis Foods Article Interest in organic cows’ milk has increased due to the perceived superior nutritional quality and improved sustainability and animal welfare. However, there is a lack of simultaneous assessments on the influence of organic dairy practices and dietary and breed drivers on productivity, feed efficiency, health parameters, and nutritional milk quality at the herd level. This work aimed to assess the impact of organic vs. conventional management and month on milk yield and basic composition, herd feed efficiency, health parameters, and milk fatty acid (FA) composition. Milk samples (n = 800) were collected monthly from the bulk tanks of 67 dairy farms (26 organic and 41 conventional) between January and December 2019. Data on breed and feeding practices were gathered via farm questionnaires. The samples were analyzed for their basic composition and FA profile using Fourier transform infrared spectroscopy (FTIR) and gas chromatography (GC), respectively. The data were analyzed using a linear mixed model, repeated measures design and multivariate redundancy analysis (RDA). The conventional farms had higher yields (kg/cow per day) of milk (+7.3 kg), fat (+0.27 kg), and protein (+0.25 kg) and higher contents (g/kg milk) of protein, casein, lactose, and urea. The conventional farms produced more milk (+0.22 kg), fat (+8.6 g), and protein (+8.1 g) per kg offered dry matter (DM). The organic farms produced more milk per kg of offered non-grazing and concentrate DM offered, respectively (+0.5 kg and +1.23 kg), and fat (+20.1 g and +51 g) and protein (+17 g and +42 g). The organic milk had a higher concentration of saturated fatty acid (SFA; +14 g/kg total FA), polyunsaturated fatty acid (PUFA; +2.4 g/kg total FA), and nutritionally beneficial FA alpha linolenic acid (ALNA; +14 g/kg total FA), rumenic acid (RA; +14 g/kg total FA), and eicosapentaenoic acid (EPA; +14 g/kg total FA); the conventional milk had higher concentrations of monounsaturated FA (MUFA; +16 g/kg total FA). Although the conventional farms were more efficient in converting the overall diet into milk, fat, and protein, the organic farms showed better efficiency in converting conserved forages and concentrates into milk, fat, and protein as a result of reduced concentrate feeding. Considering the relatively small differences in the FA profiles between the systems, increased pasture intake can benefit farm sustainability without negatively impacting consumer nutrition and health. MDPI 2023-04-08 /pmc/articles/PMC10138061/ /pubmed/37107384 http://dx.doi.org/10.3390/foods12081589 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ormston, Sabrina
Qin, Nanbing
Faludi, Gergely
Pitt, Joe
Gordon, Alan W.
Theodoridou, Katerina
Yan, Tianhai
Huws, Sharon A.
Stergiadis, Sokratis
Implications of Organic Dairy Management on Herd Performance and Milk Fatty Acid Profiles and Interactions with Season
title Implications of Organic Dairy Management on Herd Performance and Milk Fatty Acid Profiles and Interactions with Season
title_full Implications of Organic Dairy Management on Herd Performance and Milk Fatty Acid Profiles and Interactions with Season
title_fullStr Implications of Organic Dairy Management on Herd Performance and Milk Fatty Acid Profiles and Interactions with Season
title_full_unstemmed Implications of Organic Dairy Management on Herd Performance and Milk Fatty Acid Profiles and Interactions with Season
title_short Implications of Organic Dairy Management on Herd Performance and Milk Fatty Acid Profiles and Interactions with Season
title_sort implications of organic dairy management on herd performance and milk fatty acid profiles and interactions with season
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10138061/
https://www.ncbi.nlm.nih.gov/pubmed/37107384
http://dx.doi.org/10.3390/foods12081589
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