Effect of oak acorn with or without polyethylene glycol in diets containing extruded soybean on milk fatty acid profile, ruminal fermentation and plasma metabolites of lactating goats

Alipanahi, Z.; Fatahnia, F.; Jafari, H.; Taasoli, Golnaz; Mirzaei-Alamouti, H.; Barrett, David M.; Pormalekshahi, A.

doi:10.1016/j.livsci.2019.01.003

Cited by 12 publications

(11 citation statements)

References 32 publications

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“…In particular, the increase in LA and ALA concentrations, calculated as the proportional difference between the treatment and the control group, were, on average, +7% and +33%, in sheep and +17% and +24% in goats, respectively. It should be noted that, although the average increase of LA in goats appears higher than that of sheep, such differences are not statistically significant, except in the work of Alipanahi et al [ 126 ]. The increase in the PUFA concentration in milk is in accordance with the mechanism proposed by some authors about the effect of polyphenols on the biohydrogenation of unsaturated FA.…”

Section: Feeding Strategy To Improve the Fatty Acid Content In Shementioning

confidence: 97%

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Sheep and Goats Respond Differently to Feeding Strategies Directed to Improve the Fatty Acid Profile of Milk Fat

Nudda

Cannas

Correddu

et al. 2020

Animals

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This bibliographic review presents and discusses the nutritional strategies able to increase the concentration of beneficial fatty acids (FA) in sheep and goat milk, and dairy products, with a particular focus on the polyunsaturated FA (PUFA), and highlights differences between the two species. In fact, by adopting appropriate feeding strategies, it is possible to markedly vary the concentration of fat in milk and improve its FA composition. These strategies are based mostly on the utilization of herbage rich in PUFA, or on the inclusion of vegetable, marine, or essential oils in the diet of lactating animals. Sheep respond more effectively than goats to the utilization of fresh herbage and to nutritional approaches that improve the milk concentration of c9,t11-conjugated linoleic acid (c9,t11-CLA) and α-linolenic acid. Dietary polyphenols can influence milk FA profile, reducing or inhibiting the activity and growth of some strains of rumen microbes involved in the biohydrogenation of PUFA. Although the effectiveness of plant secondary compounds in improving milk FA composition is still controversial, an overall positive effect has been observed on the concentration of PUFA and RA, without marked differences between sheep and goats. On the other hand, the positive effect of dietary polyphenols on the oxidative stability of milk fat appears to be more consistent.

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Section: Feeding Strategy To Improve the Fatty Acid Content In Shementioning

confidence: 97%

“…( A ) Mix: quebracho and chestnut extract [ 122 ]; olive leaves [ 121 ]; quebracho extract [ 82 , 120 , 123 ]; lentil straw [ 121 ]; chestnut extract [ 82 , 120 ]; flowering sulla [ 118 ]. ( B ) Flemingia hay [ 128 ]; gallnut [ 125 ]; pomegranate seed oil [ 57 , 129 ]; oak [ 126 ]; mimosa extract [ 127 ].…”

Section: Figurementioning

confidence: 99%

Sheep and Goats Respond Differently to Feeding Strategies Directed to Improve the Fatty Acid Profile of Milk Fat

Nudda

Cannas

Correddu

et al. 2020

Animals

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“…Comparisons of these results were provided in grouping studies. The comprehensive database consisted of 3712 dietary treatments in 38 [27] and an article that compared CLAs in milk and meat in vivo [28]. Sensitivity and risk of bias analyses were performed for the selected publications.…”

Section: Study Criteria Quality Assessment and Data Extractionmentioning

confidence: 99%

The links between supplementary tannin levels and conjugated linoleic acid (CLA) formation in ruminants: A systematic review and meta-analysis

Purba

Paengkoum

2020

PLoS ONE

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A systematic review and meta-analysis were conducted to predict and identify ways to increase conjugated linoleic acid (CLA) formation in ruminant-derived products to treat human health issues with dietary tannins. The objective was to compare and confirm the effects of dietary tannins on CLA formation by analyzing in vitro and/or in vivo studies. We reported the results of the meta-analysis based on numerical data from 38 selected publications consisting of 3712 treatments. Generally, via multiple pathways, the CLA formation increased when dietary tannins increased. Concurrently, dietary tannins increased Δ 9 desaturation and the CLA indices in milk and meat (P < 0.05 and P < 0.001, with average R 2 values of 0.23 and 0.44, respectively), but they did not change the rumen fermentation characteristics, including total volatile fatty acids (mmol/L) and their acid components. In vitro observations may accurately predict in vivo results. Unfortunately, there was no relationship between in vitro observations and in vivo results (R 2 < 0.10), indicating that it is difficult to predict CLA formation in vivo considering in vitro observations. According to the statistical metaanalysis results regarding animal aspects, the ranges of tannin levels required for CLA formation in vitro and in vivo were approximately 0.1-20 g/kg dry matter (DM) (P < 0.001) and 2.1-80 g/kg DM (P < 0.001), respectively. In conclusion, the in vivo method was more suitable for the direct observation of fatty acid transformation than the in vitro method.

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“…Polyethylene glycol that has high affinity for tannins can form PEG-tannin complexes to deactivate tannins. Thus, PEG can improve the ruminal CP degradation ( Mkhize et al., 2018 ) and the CP digestibility ( Alipanahi et al., 2019 ) of rations containing tannins.…”

Section: Discussionmentioning

confidence: 99%

Adding polyethylene glycol to steer ration containing sorghum tannins increases crude protein digestibility and shifts nitrogen excretion from feces to urine

Xie

Yang

et al. 2021

Animal Nutrition

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The objectives of the experiment were to study the effects of adding polyethylene glycol (PEG) to steer ration containing high sorghum tannins on rumen fermentation, nutrient digestion, nitrogen (N) balance and plasma biochemical parameters. Eight growing steers at 16 months of age were allotted to a replicated 4 × 4 Latin square design with 4 treatments and 4 periods (19 d each). Polyethylene glycol at 0, 1.75, 3.50 and 7.00 g/kg dry matter (DM) were added to a basal ration containing 27.82% DM of sorghum grain (total tannins 3.3 g/kg DM) as the treatments. The results indicated that adding PEG quadratically increased the ruminal pH ( P = 0.049), tended to linearly increase the ruminal concentration of total volatile fatty acids ( P = 0.070), increased the molar proportion of acetate ( P = 0.016), linearly decreased the molar proportion of butyrate ( P = 0.015), and tended to increase the molar proportion of iso-valerate ( P = 0.061) and the ruminal concentration of ammonia N ( P = 0.092). Adding PEG tended to quadratically decrease the relative abundance of methanogenic archaea ( P = 0.082), linearly decreased the relative abundance of Fibrobacter succinogenes ( P = 0.008) and decreased the relative abundance of Butyrivibrio fibrisolvens ( P = 0.048) at 7.00 g/kg DM. Dietary addition with PEG increased the crude protein (CP) digestibility ( P < 0.001) and tended to increase the neutral detergent fiber digestibility ( P = 0.066) in a linear manner. Adding PEG to basal ration also increased the plasma globulin concentration ( P = 0.029) and tended to linearly increase the plasma total protein concentration ( P = 0.069). Adding PEG linearly decreased the fecal N excretion ( P < 0.001) and the fecal N-to-total N excretion ratio ( P = 0.004) and increased the urinary N-to-total N excretion ratio ( P = 0.004) and urinary urea excretion ( P = 0.010) without affecting the urinary N and total N excretions ( P > 0.05). It was concluded that adding PEG effectively improved the CP digestibility of the ration containing high sorghum tannins but increased the urinary urea excretion without improving the N retention and N retention rate in steers.

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Effect of oak acorn with or without polyethylene glycol in diets containing extruded soybean on milk fatty acid profile, ruminal fermentation and plasma metabolites of lactating goats

Cited by 12 publications

References 32 publications

Sheep and Goats Respond Differently to Feeding Strategies Directed to Improve the Fatty Acid Profile of Milk Fat

Sheep and Goats Respond Differently to Feeding Strategies Directed to Improve the Fatty Acid Profile of Milk Fat

The links between supplementary tannin levels and conjugated linoleic acid (CLA) formation in ruminants: A systematic review and meta-analysis

Adding polyethylene glycol to steer ration containing sorghum tannins increases crude protein digestibility and shifts nitrogen excretion from feces to urine

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