Feeding a marine-based rumen buffer increases milk production and decreases time of low reticulo-rumen pH in grazing dairy cows offered perennial ryegrass-based pasture

Rafferty, D.M.; Fahey, Alan G.; Grace, C.; Donaldson, Gordon A.; Whelan, S.J.; Lynch, M.B.; Pierce, K.M.; Mulligan, F.J.

doi:10.1016/j.anifeedsci.2019.114255

Cited by 11 publications

(9 citation statements)

References 38 publications

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“…Milk urea nitrogen (MUN) was estimated by the diacetyl monoxime method using UV/Vis-spectrophotometer (PG Instruments Ltd., London, UK) according to Aguilar et al 65 . Fat, protein, lactose, TS, and SNF concentrations were measured as weighted media depending on morning and afternoon milk yields per each test day by infrared methods using Milko-Scan 33.Yields of 4.0% FCM were calculated according to Rafferty et al 66 : while yields of ECM were calculated as described by Krause and Combs 67 : …”

Section: Methodsmentioning

confidence: 99%

Novel Crabtree negative yeast from rumen fluids can improve rumen fermentation and milk quality

Suntara

Cherdthong

Uriyapongson

et al. 2021

Sci Rep

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Upgrading the nutritive value of rice straw (RS) is necessary to increase its contribution to enhancing meat and milk production. Present work verified whether novel Crabtree negative yeast inoculant could promote RS utilization, rumen fermentation, and milk quality in tropical crossbred lactating Holstein cows. The new stain of Crabtree negative yeasts (Pichia kudriavzevii KKU20 and Candida tropicalis KKU20) was isolated from the rumen of dairy cattle. This study used 6 multiparous crossbreds between Holstein Frisian × Zebu dairy cows in their mid-lactation period. Dairy cows were randomly allocated to three ensiled RS with various yeast stains including Saccharomyces cerevisiae, P. kudriavzevii KKU20, and C. tropicalis KKU20 according to a 3 × 3 replicated Latin square design. Crabtree-negative yeast (P. kudriavzevii and C. tropicalis) increased the apparent digestibility of dry matter by about 6.9% when compared with Crabtree-positive yeast (S. cerevisiae). Bacterial populations were highest with ensiled RS by C. tropicalis KKU20. Ensiled RS with Crabtree-negative yeasts were significantly increased with total volatile fatty acids, but they did not affect volatile fatty acid profiles. Milk protein precentage was highest at 35.6 g/kg when C. tropicalis was fed, and lowest when applied with S. cerevisiae and P. kudriavzevii KKU20 in ensiled RS at 34.5 and 34.1 g/kg, respectively. Thus, feeding ensiled RS with novel Crabtree negative yeast could improve RS digestion, rumen fermentation, and milk protein content in dairy cows.

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Section: Methodsmentioning

confidence: 99%

Novel Crabtree negative yeast from rumen fluids can improve rumen fermentation and milk quality

Suntara

Cherdthong

Uriyapongson

et al. 2021

Sci Rep

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“…Concerning reticulo-ruminal pH, several studies (i.e. Graf et al ., 2005, Al Ibrahim et al ., 2012, Rafferty et al ., 2019) suggested that fast eating of forages followed by long nocturnal periods without feed intake may depress pH to values lower than those found under a more constant eating pattern. However, the diurnal pH dynamics registered in this study (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Intensive grazing systems managed under continuous stocking make use of young herbage which is associated with particularly excessive dietary crude protein (CP) contents (van Vuuren and Meijs, 2013). Additionally, young herbage is highly digestible and exclusive grazing may lower the reticulo-ruminal pH to borderline levels (Graf et al ., 2005) and, following abrupt changes to grass feeding or at high dry matter (DM) intake in mid-lactation, subacute ruminal acidosis may develop (compiled by Rafferty et al ., 2019). In contrast, the fresh herbage fed indoors is usually more mature than intensively grazed herbage and the lower energy density requires extra fermentable energy to meet the cow's demand.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen use efficiency, reticulo-ruminal pH and behaviour of lactating cows grazing either in a full-time system or in a part-time system with indoor feeding of fresh herbage and concentrate

et al. 2020

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Increasing herd size and fragmented or non-uniform land challenge pasture-based milk production systems. Therefore, part-time grazing combined with indoor feeding of fresh herbage (‘cut-and-carry’) allows to maintain the advantages of fresh-herbage-based diets. However, consequences for environmental nitrogen losses, animal behaviour and ruminal metabolism are decisive for its implementation. Animal performance, nitrogen use efficiency (NUE), reticulo-ruminal pH and feeding/locomotive behaviour were compared in six cows subjected either to full-time grazing (system F) or to part-time grazing system with indoor feeding of fresh herbage and concentrate (system P). Biweekly samplings were performed on six lactating cows per treatment in spring, summer and autumn. Nitrogen (N) balance was calculated from estimated N intake and N output via faeces, urine and milk. Reticulo-ruminal pH was recorded using a wireless data recorder. Eating and locomotive behaviour were measured with noseband sensors and pedometers. In spring, but not later, herbage intake per unit of body weight was higher for system F compared to system P cows. Eating time was shorter by 15% in P compared to F cows. Across systems, NUE declined from spring to summer/autumn from about 300 to 200 g milk protein N/kg N intake. Reticulo-ruminal pH was more variable under part-time grazing conditions, with a pronounced decrease subsequent to offering the herbage indoors. The part-time grazing system resulted in similar or higher NUE than full-time grazing. Additional studies with larger numbers of experimental units are required to be able to develop comprehensive recommendations for the improvement of the two grazing systems.

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“…Thus, it is clear from the literature that low ruminal pH, in some cases consistent with referenced definitions for SARA, can occur with pasture-based diets. This finding is often reported when medium to high levels of supplements are fed in addition to pasture (Rafferty et al, 2019;Fleming et al, 2020), but also when low or no supplementation takes place (O'Grady et al, 2008). However, it is perhaps more important to consider whether the ruminal conditions (pH included) that exist in these situations are important for reduced productivity or animal health.…”

Section: Comparisons Among Diet Typesmentioning

confidence: 98%

“…Other studies also lend support to the hypothesis that ruminal pH can be very low in grazing cows. Rafferty et al (2019) used wireless indwelling pH recording devices likely to locate in the reticulum to record gut acidity in grazing cows that were also fed 8 kg of a high-starch concentrate. In this study of commercially relevant diets for high-producing grazing cows, minimum pH recordings of 5.4 and 5.5 were reported.…”

Section: Grazing-based Sara Challengesmentioning

confidence: 99%

Invited review: Effect of subacute ruminal acidosis on gut health of dairy cows

Plaizier

Mulligan

Neville³

et al. 2022

Journal of Dairy Science

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Feeding a marine-based rumen buffer increases milk production and decreases time of low reticulo-rumen pH in grazing dairy cows offered perennial ryegrass-based pasture

Cited by 11 publications

References 38 publications

Novel Crabtree negative yeast from rumen fluids can improve rumen fermentation and milk quality

Novel Crabtree negative yeast from rumen fluids can improve rumen fermentation and milk quality

Nitrogen use efficiency, reticulo-ruminal pH and behaviour of lactating cows grazing either in a full-time system or in a part-time system with indoor feeding of fresh herbage and concentrate

Invited review: Effect of subacute ruminal acidosis on gut health of dairy cows

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