Nutritional Value of Cork Oak Acorn (Quercus suber L.)As an Energy Source for Growing Goats

Gasmi-Boubaker, Aziza; Abdouli, H.; Khelil, Hajer; Mouhbi, R.; Tayachi, L.

doi:10.3923/ajava.2007.32.37

Cited by 13 publications

(7 citation statements)

References 7 publications

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“…The differences among studies are possibly associated with differences in production site and stage of maturity of acorn. Baubaker et al 7 suggested that some variation in the chemical composition of acorn can be expected due to variation in production site, Quercus species and stage of maturity. On the other hand, Maujahed et al 24 showed that the chemical composition of acorn from Q. coccifera was significantly changed with maturity.…”

Section: Discussionmentioning

confidence: 99%

“…Jassim et al 4 suggested that substitution of acorn for barley at a maximum level of 25% would be economically advantageous. High substation rate of acorn for barley resulted in decreased daily gain due to the decreased digestibility of nutrients 4,7 .…”

Section: Discussionmentioning

confidence: 99%

“…90% 5 . The crude protein contents of acorn ranged from 3.7 to 7.9% depending on the oak species and maturity stage [6][7] . Recently in vitro gas production technique has been approved to be as a powerful technique to determine the biological effect of tannin since current analytical techniques do not reflect the biological effects of tannin [8][9][10][11][12] .…”

Section: Introductionmentioning

confidence: 99%

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Potential Nutritive Value and Condensed Tannin Contents of Acorns from Different Oak Species

Kaya¹,

Kamalak²

2012

Kafkas Univ Vet Fak Derg

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The potential nutritive values of acorns of Quercus suber, Quercus branti, Quercus coccifera, Quercus cerris and Quercus infectoria were estimated by chemical composition and in vitro gas production technique. Acorns collected at least 10 different trees in three experimental plots. There were significant (P<0.001) differences in the chemical composition among acorns obtained from different oak species. Crude protein (CP) contents of acorns ranged from 25.48 to 61.94 g/kg dry matter (DM). Neutral detergent fiber (NDF) contents ranged from 231.4 to 326.3 g/kg DM. Acid detergent fiber (ADF) contents ranged from 155.9 to 215.4 g/kg DM. Condensed tannin (CT) contents ranged from 7.2 to 26.7 g/kg DM. Starch contents ranged from 600.0 to 681.5 g/kg DM. Polyethylene glycol (PEG) addition significantly (P<0.001) increased the gas production and some estimated parameters of oak acorns. Although there is no significant (P>0.5) differences in the potential gas production of acorn among oak species when incubated in the absence of PEG, there is significant (P<0.001) differences in the potential gas production of acorn among oak species when incubated in the presence of PEG. Although the estimated organic matter (OMD) and metabolisable (ME) contents of acorn for Q. suber and Q. infectoria were significantly (P<0.001) higher than those for Q. branti, Q. coccifera and Q. cerris when incubated in the absence of PEG, the estimated OMD and ME contents of acorn for Quercus cerris and Q. infectoria were significantly lower than those for Q. suber, Q. branti and Q. coccifera when incubated in the presence of PEG. The improvement in gas production, OMD and ME in the presence of PEG emphasizes the negative effect of tannins on digestibility. As a conclusion, oak acorns have potential nutritive values for ruminant animals such as sheep and goat since acorns have high starch, OMD and ME but low level of CT contents. However these results obtained in the current study should be supported by in vivo feeding experiments.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Potential Nutritive Value and Condensed Tannin Contents of Acorns from Different Oak Species

Kaya¹,

Kamalak²

2012

Kafkas Univ Vet Fak Derg

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“…The low crude protein degradation of FA group could be also explained by the high amount of tannin in the concentrate. The low crude protein degradation of FA group could be also explained by the high amount of tannin in the concentrate (Reed, 1995;Gasmi-Boubaker et al, 2007).…”

Section: Diet Intake Nutrient Digestibility and Nitrogen Balancementioning

confidence: 99%

Effects of green oak acorn (<i>Quercus ilex</i>) intake on nutrient digestibility, lamb growth, and carcass and non-carcass characteristics

et al. 2022

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Abstract. The green oak (Quercus ilex) plays an important role in forest ecology when oaks are the dominant species or are plentiful. The use of acorns as an alternative to barley for livestock feeding can be beneficial for breeders. The aim of this study was the evaluation of the acorn intake by lambs in two stages, suckling and fattening, on growth, diet digestibility, carcass and non-carcass characteristics. For this, 32 lambs were used. During the suckling period, 16 lambs were reared on range pasture, supplied by barley (S-Ba), the other 16 on forest pasture and supplied by acorns (S-Ac). During the fattening period, lambs were assigned to concentrate based either on barley (F-Ba) or acorn (F-Ac) resulting in eight animals per suckling treatment per fattening treatment. The feed intake, diet digestibility and lamb growth were recorded. At 90 d of fattening, all animals were slaughtered and carcass traits studied. The main results show that the incorporation of acorn in concentrate was without effect on digestibility of organic matter, crud protein and neutral detergent fibre. The nitrogen balance was positive for animals fed barley concentrate or acorn one (>8 g d−1). The lamb growth rates and slaughter body weight were not affected by acorn incorporation in both phases (p>0.05). Consequently, the carcass weights and carcass yields were similar. The F-Ac and S-Ac lambs had relatively heavier liver than F-Ba and S-Ba. The carcass composition in cutting pieces and that in tissues (muscle, fat and bone) was similar for all groups. These results suggest that acorns could replace partially conventional feedstuffs as concentrate without affecting animal performance and carcass quality.

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“…However, inadequate nutrition is one of the most problematic constraints to the ruminant livestock industry in developing tropical countries. In particular, meat-type goats need attention since they do not fatten in ways similar to other livestock and their growth rate is slower (Morand-Fehr, 2005;Gasmi-Boubaker et al, 2007). Evaluation of haematological parameters or attributes serves as an index of general physiology, nutrition and health status of animals.…”

Section: Introductionmentioning

confidence: 99%

Haematology and serum biochemical profile of Kalahari Red goats reared in the hothumid south-west Nigeria

Okwelum

Mustapha

Oluwatosin

2020

NJAP

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The aim of this study was to determine the biochemical and haematological profiles of Kalahari Red goats reared in the tropical environment. The Kalahari Red goats were imported into Nigeria from South Africa by the Federal University of Agriculture Abeokuta, Nigeria. The study was carried out on fifty animals of both sexes. The animals were managed under semi-intensive system where they were allowed to go out and graze on paddocks during some part of the day and brought back to the pens in the evening. The goats were fed with concentrate and grazed on sown pastures of Chloris gayana and Stylosanthes amata. Water Rwas given ad-libitum. The serum biochemical analysis was determined using Randox analysis kits. The sex of each animal was noted and recorded. The packed cell volume, haemoglobin concentration, red blood cell count, white blood cell count, neutrophils, lymphocytes, monocytes, eosinophils and basophils were determined as haematological parameters while total protein, albumin, globulin, sodium, potassium, calcium and phosphorus were determined in serum analysis. The results showed that there was no significant (p>0.05) difference in all the haematological parameters determined across sex. There were significant (p<0.05) differences in total protein and albumin across sex of which the mean values were higher in the female goats. The value of the mean total protein in the female goats was 5.93±0.88 while the value was 5.31±0.23 in the male goats. It can be concluded that sex did not have any influence on the haematology but had association on only the protein component of the serum biochemistry. This result obtained can be used as a reference value for Kalahari Red goats reared in the tropics and under similar nutrition.

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Nutritional Value of Cork Oak Acorn (Quercus suber L.)As an Energy Source for Growing Goats

Cited by 13 publications

References 7 publications

Potential Nutritive Value and Condensed Tannin Contents of Acorns from Different Oak Species

Potential Nutritive Value and Condensed Tannin Contents of Acorns from Different Oak Species

Effects of green oak acorn (<i>Quercus ilex</i>) intake on nutrient digestibility, lamb growth, and carcass and non-carcass characteristics

Haematology and serum biochemical profile of Kalahari Red goats reared in the hothumid south-west Nigeria

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Nutritional Value of Cork Oak Acorn (Quercus suber L.)As an Energy Source for Growing Goats

Cited by 13 publications

References 7 publications

Potential Nutritive Value and Condensed Tannin Contents of Acorns from Different Oak Species

Potential Nutritive Value and Condensed Tannin Contents of Acorns from Different Oak Species

Effects of green oak acorn (&lt;i&gt;Quercus ilex&lt;/i&gt;) intake on nutrient digestibility, lamb growth, and carcass and non-carcass characteristics

Haematology and serum biochemical profile of Kalahari Red goats reared in the hothumid south-west Nigeria

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About

Effects of green oak acorn (<i>Quercus ilex</i>) intake on nutrient digestibility, lamb growth, and carcass and non-carcass characteristics