Graded supplementation of chestnut tannins to dairy cows fed protein-rich spring pasture: effects on indicators of protein utilization

Kapp-Bitter, Alexandra N.; Dickhoefer, Uta; Suglo, E.; Baumgartner, Lana Cristina; Kreuzer, Michael; Leiber, Florian

doi:10.22358/jafs/121053/2020

Cited by 14 publications

(10 citation statements)

References 26 publications

(46 reference statements)

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“…The present study's observation of the absence of the effect ATE inclusion in pellets on nutrient intakes, milk production and milk quality corroborates the findings of Kapp-Bitter et al. (2020) .…”

Section: Discussionsupporting

confidence: 91%

Effect of dietary inclusions of different types of Acacia mearnsii on milk performance and nutrient intake of dairy cows

Mhlongo

Kenyon²,

Nsahlai

2023

Veterinary and Animal Science

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Section: Discussionsupporting

confidence: 91%

Effect of dietary inclusions of different types of Acacia mearnsii on milk performance and nutrient intake of dairy cows

Mhlongo

Kenyon²,

Nsahlai

2023

Veterinary and Animal Science

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“…All 35 plants tested were grown at the same time and at the same site, which enhanced comparability among plants but restricted the applicability of the results to these conditions. The dietary inclusion of 30% was high with respect to practical feasibility; however, levels of tannin supplementation that are too low may fail to achieve effects (Kapp-Bitter et al 2020).…”

Section: Discussionmentioning

confidence: 99%

Mature herbs as supplements to ruminant diets: effects on in vitro ruminal fermentation and ammonia production

et al. 2021

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Context High concentrations of crude protein in ruminant diets may lead to excessive production of ruminal ammonia, which may stress the animal’s metabolism and impact nitrogen efficiency. This may become a problem in zero-concentrate feeding systems when pasture grass is rich in crude protein. Polyphenols such as tannins may protect part of dietary protein from ruminal degradation and thus inhibit ammonia formation. Aims The present study screened mature herbs for their potential to mitigate ruminal ammonia formation in cattle, when provided as a supplement to a forage diet. Methods Thirty-five temperate-climate, herbaceous meadow plant species (including three legumes) that appear in biodiverse natural and sown pastures were investigated for their effects on ruminal ammonia production. Aboveground material was harvested during ripening of the seeds and analysed for nutrient and phenol concentrations. Net energy and protein absorbable at the duodenum were calculated. Incubations (24 h) with cattle rumen fluid following the in vitro Hohenheim Gas Test protocol were performed to compare the effects of the test plants on ruminal gas and ammonia formation. Test plants replaced one-third of a basal mixture consisting of 57% Lolium perenne L. and 43% Medicago sativa L. (air-dry-matter basis). Results were compared with those obtained with the basal mixture alone. Key results According to regression analysis, ammonia concentration after incubation was negatively related to concentrations of total extractable phenols and total tannins in feed mixtures, whereas the relationship was weakly positive with dietary crude protein. In 23 and 19 of the test diets, respectively, in vitro gas production (indicating ruminal organic matter digestibility) and ammonia concentrations in the incubation medium after 24 h were significantly lower than with the basal mixture alone. Incubations containing Galium verum L., Leontodon hispidus L., Lotus corniculatus L., Onobrychis viciifolia Scop., Plantago lanceolata L., Sanguisorba minor Scop. and Scabiosa columbaria L. maintained gas production and estimated in vitro organic matter digestibility while at the same time lowering ammonia concentrations. Conclusions Seven mature herbs of a screening of 35 proved to have potential for positive effects on ruminal protein utilisation without impairing fermentation. Implications These herbs are of particular interest as dietary supplements for dairy cows grazing protein-rich pastures.

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“…In the present study, the effect of dietary tannin supplementation on milk yield and its main constituents was not significant, regardless of the season. In the last decade, most scientific articles reported no improvement in milk yield, or fat and protein contents from cows eating different sources of tannin 31 – 33 . Henke et al 34 reported an increase in milk fat content in cows supplemented for 21 days with 3% DMI of quebracho tannin extract, but the effect was combined with a lower milk yield.…”

Section: Discussionmentioning

confidence: 99%

Effect of dietary tannin supplementation on cow milk quality in two different grazing seasons

Menci

Natalello

Luciano

et al. 2021

Sci Rep

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Extensive farming systems are characterized by seasons with different diet quality along the year, as pasture availability is strictly depending on climatic conditions. A number of problems for cattle may occur in each season. Tannins are natural polyphenolic compounds that can be integrated in cows’ diet to overcome these seasonal problems, but little is known about their effect on milk quality according to the season. This study was designed to assess the effects of 150 g/head × day of tannin extract supplementation on proximate composition, urea, colour, cheesemaking aptitude, antioxidant capacity, and fatty acid (FA) profile of cow milk, measured during the wet season (WS) and the dry season (DS) of Mediterranean climate. In WS, dietary tannins had marginal effect on milk quality. Conversely, in DS, the milk from cows eating tannins showed 10% lower urea and slight improvement in antioxidant capacity, measured with FRAP and TEAC assays. Also, tannin extract supplementation in DS reduced branched-chain FA concentration, C18:1 t10 to C18:1 t11 ratio and rumenic to linoleic acid ratio. Tannins effect on rumen metabolism was enhanced in the season in which green herbage was not available, probably because of the low protein content, and high acid detergent fibre and lignin contents in diet. Thus, the integration of tannin in the diet should be adapted to the season. This could have practical implications for a more conscious use of tannin-rich extracts, and other tannin sources such as agro-industrial by-products and forages.

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Graded supplementation of chestnut tannins to dairy cows fed protein-rich spring pasture: effects on indicators of protein utilization

Cited by 14 publications

References 26 publications

Effect of dietary inclusions of different types of Acacia mearnsii on milk performance and nutrient intake of dairy cows

Effect of dietary inclusions of different types of Acacia mearnsii on milk performance and nutrient intake of dairy cows

Mature herbs as supplements to ruminant diets: effects on in vitro ruminal fermentation and ammonia production

Effect of dietary tannin supplementation on cow milk quality in two different grazing seasons

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