Performance and methane emissions in dairy cows fed oregano and green tea extracts as feed additives

Journal of Dairy Science
G J KollingV Fischer

Abstract

Plant extracts have been proposed as substitutes for chemical feed additives due to their potential as rumen fermentation modifiers and because of their antimicrobial and antioxidant activities, possibly reducing methane emissions. This study aimed to evaluate the use of oregano (OR), green tea extracts (GT), and their association as feed additives on the performance and methane emissions from dairy between 28 and 87 d of lactation. Thirty-two lactating dairy cows, blocked into 2 genetic groups: 16 Holstein cows and 16 crossbred Holstein-Gir, with 522.6 ± 58.3 kg of body weight, 57.2 ± 20.9 d in lactation, producing 27.5 ± 5.0 kg/cow of milk and with 3.1 ± 1.8 lactations were evaluated (means ± standard error of the means). Cows were allocated into 4 treatments: control (CON), without plant extracts in the diet; oregano extract (OR), with the addition of 0.056% of oregano extract in the dry matter (DM) of the diet; green tea (GT), with the addition of 0.028% of green tea extract in the DM of the diet; and mixture, with the addition of 0.056% oregano extract and 0.028% green tea extract in the DM of the diet. The forage-to-concentrate ratio was 60:40. Forage was composed of corn silage (94%) and Tifton hay (6%); concentrate was ...Continue Reading

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Citations

Oct 9, 2019·Journal of Animal Physiology and Animal Nutrition·Mahmoud AlagawanyKuldeep Dhama
Mar 23, 2021·Frontiers in Veterinary Science·Luis O TedeschiSusanne U Mertens-Talcott
Apr 4, 2021·Animals : an Open Access Journal From MDPI·Nguyen N BangDavid M McNeill
Jun 3, 2021·Animals : an Open Access Journal From MDPI·Marta MichalakJakub Pacoń
Jul 3, 2021·Animals : an Open Access Journal From MDPI·Sylvie HadrováSvetlana Malyugina
Aug 18, 2021·Tropical Animal Health and Production·Pedro Antonio Ochoa-GarcíaAgustín Corral-Luna

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