The use of tannins as silage additives: effects on silage composition and mobile bag disappearance of dry matter and protein

Salawu, M.B.; Acamovic, T.; Stewart, C. S.; Hvelplund, T.; Weisbjerg, M.R.

doi:10.1016/s0377-8401(99)00105-4

Cited by 86 publications

(117 citation statements)

References 30 publications

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“…Numerous papers have suggested that CT concentration below 50 g/kg DM in the diet does not have important effects on ruminal fermentation (Barry and McNabb, 1999;Salawu et al, 1999). In our study, the CT concentration was smaller than the recommended values, which vary according to laboratory methods used for CT analysis and may not be applicable for all forages (Mueller-Harvey, 2006).…”

Section: Rumen Fluid Compositioncontrasting

confidence: 60%

“…This difference appeared perhaps because of the presence of 14.5% of dandelion in their study. CTs are considered beneficial for silage fermentation, as they protect forage proteins from degradation (Salawu et al, 1999) by inhibiting plant and microbial enzymes and/or by forming complexes with proteins (Waghorn, 2008). Forages containing CT undergo less ensilage-process proteolysis and less transformation of their plant protein N into NPN compared with forages without CT (Albrecht and Muck, 1991;Fraser et al, 2000).…”

Section: Discussionmentioning

confidence: 99%

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Effects of condensed tannins in wrapped silage bales of sainfoin (Onobrychis viciifolia) on in vivo and in situ digestion in sheep

Theodoridou

Aufrere

Andueza

et al. 2012

Animal

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The objective of this study was to characterize the condensed tannins (CTs) in wrapped silage bales of sainfoin (Onobrychis viciifolia) and examine their potential action on in vivo and in situ digestive characteristics in sheep. Silage was made from sainfoin, cut at two phenological stages. The first phenological stage, at which silage was made, was from the first vegetation cycle at the end of flowering and the second stage silage was made from regrowth, 5 weeks after the first cut, but before flowering. The silages made from the two phenological stages were fed to 12 rumen-fistulated sheep in a crossover design. Of the 12 sheep, six received polyethylene glycol (PEG) to bind with and remove the effects of CT, whereas the other six were dosed with water. Organic matter digestibility, total-tract N digestibility and N (N) balance were measured over 6 days. Kinetic studies were performed on total N, ammonia N (NH 3 -N) and volatile fatty acids (VFAs) in rumen fluid before and 1.5, 3 and 6 h after feeding. The kinetics of degradation of dry matter and N from Dacron bags suspended in the rumen were also determined. Biological activity of CT (protein-binding capacity) and CT concentration were greater for the silage made from sainfoin at the early flowering stage. Total-tract N digestibility was increased by the addition of PEG (P , 0.001) to the sainfoin silage before flowering (P , 0.001). CTs decreased N excretion in urine (P , 0.05) and increased faecal N excretion (P , 0.001), but had no effect on body N retention, which is beneficial for the animal. Ruminal N degradability was smaller in the presence of active CT ( P , 0.001) at both phenological stages; however, soluble N (P 5 0.2060) and NH 3 -N (P 5 0.5225) concentrations in rumen fluid remained unchanged. The results of this experiment indicate that CT in the sainfoin retain their ability to affect the nutritive value of preserved forage legumes.Keywords: feed value, in vivo measurements, tannins, polyethylene glycol, sainfoin silage ImplicationsSilage allows the use of good-quality forage throughout the year. Although numerous papers have focused on the effect of condensed tannins (CTs) on the nutritive value of fresh forages, only few reports give data on preserved tanniniferous forages. The potential of tannins in legumes has not been fully exploited in temperate regions where livestock production occurs, largely because the CT-containing fodder legumes have poorer agronomic characteristics than tannin-free legumes. This study assessed the nutritive value of sainfoinwrapped silage bales. The effect of CT on in vivo and on in situ rumen degradability of sainfoin, which had been ensiled at two stages of maturity, was investigated in sheep. In order to investigate the effects of CT, measurements were recorded with and without polyethylene glycol, which inactivates CT throughout the digestive tract.

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Section: Rumen Fluid Compositioncontrasting

confidence: 60%

Section: Discussionmentioning

confidence: 99%

Effects of condensed tannins in wrapped silage bales of sainfoin (Onobrychis viciifolia) on in vivo and in situ digestion in sheep

Theodoridou

Aufrere

Andueza

et al. 2012

Animal

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“…Therefore, in order to maximize the nutrient supply from palm leaves, long residence times in the rumen may be required which may allow the rumen microbes to attach and degrade the fiber that may otherwise be resistant to microbial enzymes (Salawu et al, 1999).…”

Section: Discussionmentioning

confidence: 99%

In vitro assessment of nutritive value of date palm by-products as feed for ruminants

Boufennara¹,

Bouazza²,

Antonio³

et al. 2016

Emir. J. Food Agric

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“…Salawu et al (1999) used three commercial tannin sources (quebracho, mimosa and myrabolam) as silage additives and Frutos et al (2000) used commercial quebracho tannin extracts as additive for protecting soya-bean meal protein against rumen degradation. Tannins extracted from Cistus ladanifer L. (CL) reduce in sacco rumen protein degradability (Dentinho et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

The use of a tannin crude extract from Cistus ladanifer L. to protect soya-bean protein from degradation in the rumen

Dentinho¹,

Moreira²,

Pereira³

et al. 2007

Animal

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Cistus ladanifer L. (CL) is a perennial shrub abundant in dry woods and dry land of Mediterranean zone, with high level of tannins. Tannins bind to protein, preventing its degradation in the digestive compartments. This tannin/protein complex may be advantageous when partially protecting good-quality feed protein from excessive rumen protein degradation. The objective of this trial was to use a CL phenol crude extract to prevent excessive rumen degradation of soya-bean meal protein. The phenolic compounds were extracted using an acetone/water solution (70:30, v/v). Soya-bean meal was then treated with this crude CL extract, containing 640 g of total phenols (TP) per kg of dry matter (DM), in order to obtain mixtures with 0, 12.5, 25, 50, 100 and 150 g of TP per kg DM. Three rumen-cannulated rams were used to assess in sacco rumen degradability of DM and nitrogen (N). The three-step in vitro procedure was used to determine intestinal digestibility.

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The use of tannins as silage additives: effects on silage composition and mobile bag disappearance of dry matter and protein

Cited by 86 publications

References 30 publications

Effects of condensed tannins in wrapped silage bales of sainfoin (Onobrychis viciifolia) on in vivo and in situ digestion in sheep

Effects of condensed tannins in wrapped silage bales of sainfoin (Onobrychis viciifolia) on in vivo and in situ digestion in sheep

In vitro assessment of nutritive value of date palm by-products as feed for ruminants

The use of a tannin crude extract from Cistus ladanifer L. to protect soya-bean protein from degradation in the rumen

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