The use of polyethylene glycol to reduce the anti-nutritional effects of tannins in goats fed woody species

Decandia, M.; Sitzia, M.; Cabiddu, A.; Kababya, D.; Molle, G.

doi:10.1016/s0921-4488(00)00145-0

Cited by 107 publications

(73 citation statements)

References 17 publications

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“…The availability of energy may have been affected by PEG, as evidenced by higher body gain during phase 1 of the present study (Table 1). This is consistent with results that PEG has the potential to increase productivity in goats feeding in tannin-rich Mediterranean environments (Gilboa et al 2000, Decandia et al (2000.…”

Section: Discussionsupporting

confidence: 92%

“…A limited effect of PEG on total intake at pasture was noted in some studies (Decandia et al 2000), whereas others working with penned animals restricted in the variety of foods reported increased dry matter (DM) intake (Silanikove et al 1996, Ben Salem et al 2000, Titus et al 2001). The availability of energy may have been affected by PEG, as evidenced by higher body gain during phase 1 of the present study (Table 1).…”

Section: Discussionmentioning

confidence: 99%

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Polyethylene glycol affects goats' feeding behavior in a tannin-rich environment

Landau¹,

Perevolotsky²,

Kababya³

2002

REM

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High concentrations of condensed tannins in browse impair brush clearing by goats. We studied the effect of polyethylene glycol (PEG, MW 4000), a polymer that binds condensed tannins, on the feeding behavior of Damascus goats (Capra hircas) on a range dominated by tannin-rich lentisk (Pistacia lentiscus L.). This was done with or without a nutritious alternative to browse (alfalfa hay) available at pasture. In phase 1, no hay was provided to goats; in phase 2, hay was distributed daily in the field. In both phases, 6 goats had free access to PEG while at pasture, while 6 goats that grazed separately on another paddock did not.All goats received each night an allowance of concentrate (400 g day"' of 40% ground corn grain, 40% ground barley, 17% soybean meal and 3% of a mineral-vitamin premix, and contained as fed 16% crude protein (CP) and 2.66 Mcal kg"' of Metabolizable Energy). The 2 groups of goats alternated daily between paddocks. Goats supplemented with PEG spent more time browsing lentisk than goats in the control group (73 and 41%, respectively, P < 0.0001). Goats in the control group spent more time foraging on dry grasses than their PEG-fed counterparts (28 and 12%, respectively, P < 0.0001). Goats from the PEG group gained body weight at a higher rate than controls. The daily intake of PEG was 450 g, with an intake rate of 1.2 g sec-'. Supplemental alfalfa hay substituted partly for dry grasses in goats' diets, but did not modify the percent of time goats in either treatment spent browsing lentisk. Our data suggest that PEG has the potential to increase intake of tannin-rich species, even where alternative fodder of better nutritional quality is present. However, self-feeding of PEG may not be the best way to provide PEG because goats may ingest more PEG than needed to annul the aversive effects of tannins on food intake. Mcal kg' de energia metaboizable). Los 2 grupos de cabras se alternaron diariamente entre los potreros. Las cabras suplementadas con PEG pasaron mas tiempo ramoneando el " Lentisk" que las cabras del grupo control (73 y 41 %, respectivamente, P < 0.0001). Las cabras del grupo control pasaron mas tiempo apacentando zacates secos que las cabras suplementadas con PEG (28 y 12% respectivamente, P < 0.0001). Las cabras del grupo con PEG ganaron peso a una mayor tasa que las del grupo control. El consumo diario de PEG fue de 450 g con una tasa de ingestion de 1.2 g seg-l. La alfalfa suplementada substituyo parcialmente los zacates secos de la dieta de las cabras, pero no modifico el porcentaje de tiempo que las cabras de cualquier grupo pasaron ramoneando el " Lentisk" Nuestros datos sugieren que el PEG tiene potencial para incrementar el consumo de especies ricas en taninos, aun donde un alimento alternativo de mejor calidad nutritional este presente. Sin embargo, el autoconsumo de PEG puede no ser la mejor manera de suministrarlo porque las cabras pueden ingerir mas PEG del requerido para anular el efecto aversivo de los taninos en el consumo de alimento.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Polyethylene glycol affects goats' feeding behavior in a tannin-rich environment

Landau¹,

Perevolotsky²,

Kababya³

2002

REM

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“…The chemical composition of P. lentiscus was similar to that reported by Decandia et al (2000). The TCT concentration of P. lentiscus was lower than that reported by Silanikove et al (1996) and Decandia et al (2000). Gas production and most of the estimated parameters showed a negative correlation with NDF, ADF, TCT and BCT.…”

Section: Discussionsupporting

confidence: 80%

Comparison between in situ dry matter degradation and in vitro gas production of tannin-containing leaves from four tree species

Kamalak

Canbolat²,

Gürbüz³

2006

SA J. An. Sci.

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Dry matter (DM) degradation of Glycrrhiza glabra L, Arbutus andrachne, Juniperus communis, and Pistica lentiscus was determined using two different techniques: (i) the in vitro gas production and (ii) the in situ nylon bag degradability technique. Samples were incubated in situ and in vitro for 3, 6, 12, 24, 48, 72 and 96 h. In situ and in vitro DM degradation kinetics were described using the equation y = a + b (1 -e ct ). At all incubation times except 3 and 72 h the cumulative gas production of J. communis was significantly lower than that of G. glabra, A. andrachne and P. lentiscus. At 3, 6 and 12 h incubation times the DM disappearance of J. communis was only significantly lower than that of P. lentiscus. At 24 and 48 h incubation times DM disappearance of J. communis was significantly lower than that of A. andrachne and P. lentiscus. There were significant relationships between in vitro gas production and in situ DM disappearance at 24 h and 96 h incubation times. The gas productions at 24 and 96 h incubation explained 51.2 and 52.4% of variation of DM disappearance, respectively. Gas production from the insoluble fraction (b) alone explained 66.4% of the variation of effective DM degradability (EDMD). The inclusion of gas production from quickly soluble fraction (a) and rate constant (c) of gas production in the regression equation did not improve the accuracy of predicting EDMD. It was concluded that in situ DM disappearance parameters of tannin-containing tree leaves such as used in this present study may be predicted from in vitro gas production parameters. _______________________________________________________________________________________

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“…Tannins have also been reported to bind preferentially with polyethylene glycol (PEG ) whose supplementation has been used to eliminate and evaluate the effects of tannins (Decandia et al 2000). Pistachio byproducts have recently come to be used as feedstuff in ruminant nutrition in Iran (Vahmani and Naserian 2005;Gholizadeh et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Effects of pistachio by-products in replacement of alfalfa hay on ruminal fermentation, blood metabolites, and milk fatty acid composition in Saanen dairy goats fed a diet containing fish oil

Ghaffari

Tahmasbi

Khorvash

et al. 2013

Journal of Applied Animal Research

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(2014) Effects of pistachio by-products in replacement of alfalfa hay on ruminal fermentation, blood metabolites, and milk fatty acid composition in Saanen dairy goats fed a diet containing fish oil, Journal of Applied Animal Research, 42:2,[186][187][188][189][190][191][192][193] The objective of this study was to investigate the effects of pistachio by-products (PBP) in replacement of alfalfa hay (AH) on ruminal fermentation, blood metabolites, and milk fatty acid composition in Saanen dairy goats fed a diet containing fish oil. For this purpose, 15 multiparous lactating Saanen goats (on day 25 postpartum, 38.159 1.2 kg) were randomly assigned to three treatment diets in a completely randomized design with five goats per treatment. The treatment consisted of feeding the following diets: (1) control (AH), (2) 30% PBP, and (3) 30% PBP 'polyethylene glycol (PEG, 1 g/Kg of dry matter [DM]). The experiment lasted 21 days, including 16 days of adaptation to the experimental diets followed by a five-day sampling period for determining milk yield and composition, dry matter intake (DMI), and blood metabolites. The results showed that DMI was affected (PB 0.05) by using PBP in the diets. The goats fed PBP had a lower (PB0.05) DMI than those in other treatments. No differences were observed in milk yield and composition among the dietary treatments. The goats fed PBP (with and without PEG) had higher (P B0.05) amounts of C16:0 and trans-C18:1 isomer in their milk fat than those fed AH. C24:0 was detected at higher (P B0.05) concentrations in goats fed AH than those in other treatments. Overall, different treatments had no significant effects on the concentrations of saturated, monounsaturated, and polyunsaturated fatty acids (PUFA) in milk fat. Trans fatty acids (TFA) in milk fat exhibited higher (PB0.05) concentrations in PBP and PBP-PEG treatments than in AH. However, no differences were detected in the concentrations of short, medium, and long chain fatty acids among the treatments. No differences were observed in rumen pH among the treatments, while rumen ammonia-N concentrations were lower (P B0.01) in goats fed PBP than those in the other treatments. Treatments showed no differences with regard to blood metabolites (i.e., cholesterol, triglyceride, blood urea nitrogen, total protein, albumin, and glucose). These findings indicate that the inclusion of PBP in replacement of AH in the diet of dairy Saanen goats have no adverse effects on ruminal fermentation and blood metabolites. Moreover, PBP is capable of modifying the fatty acid profile of milk in dairy goat.

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The use of polyethylene glycol to reduce the anti-nutritional effects of tannins in goats fed woody species

Cited by 107 publications

References 17 publications

Polyethylene glycol affects goats' feeding behavior in a tannin-rich environment

Polyethylene glycol affects goats' feeding behavior in a tannin-rich environment

Comparison between in situ dry matter degradation and in vitro gas production of tannin-containing leaves from four tree species

Effects of pistachio by-products in replacement of alfalfa hay on ruminal fermentation, blood metabolites, and milk fatty acid composition in Saanen dairy goats fed a diet containing fish oil

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