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Jegede A.V.,Abeokuta Federal University of Agriculture | Oduguwa O.O.,Abeokuta Federal University of Agriculture | Oso A.O.,Abeokuta Federal University of Agriculture | Fafiolu A.O.,Abeokuta Federal University of Agriculture | And 2 more authors.
Livestock Science | Year: 2012

A 140-day study was conducted to determine the influence of dietary organic Cu (Cu proteinate) and inorganic Cu (CuSO 4) on growth performance, blood characteristics and plasma lipids of growing pullet. 480day-old Kabiru® breed chicks were randomly allocated to 6 treatment groups of 80 birds split over 4 replicates of 20 birds each. The diets consisted of a basal diet (containing 32.84 and 31.78mg/kg Cu for starter and grower phases respectively) supplemented with organic Cu (Cu proteinate; Cu-P) or inorganic Cu (Cu sulphate; CuSO 4) fed at 3 dietary concentrations (50, 100 and 150mg/kg). No significant (P>0.05) effect of Cu source, concentration and interaction of Cu source and concentration was obtained for growth response at starter and grower phases. CuSO 4 supplementation resulted in elevated (P<0.05) serum uric acid. Supplementation of diets with 150mg/kg Cu resulted in the reduction (P<0.05) of white blood cell count of the birds. Cu-P decreased (P<0.05) plasma cholesterol, low density lipoprotein (LDL) and triglyceride in comparison to CuSO 4. CuSO 4 supplementation resulted in increased high density lipoprotein (HDL). Cu concentration elicited a linear response (P<0.05) for total cholesterol, LDL and triglyceride. It was concluded that the source and concentration of Cu did not lead to a significant difference in growth performance. Furthermore, Cu-P reduced (P<0.05) the plasma cholesterol concentration of the experimental birds when compared to CuSO 4. Also plasma cholesterol concentration reduced (P<0.05) with increased dietary Cu concentration. © 2012 Elsevier B.V. Source

Jegede A.V.,Abeokuta Federal University of Agriculture | Oduguwa O.O.,Abeokuta Federal University of Agriculture | Bamgbose A.M.,Abeokuta Federal University of Agriculture | Fanimo A.O.,Abeokuta Federal University of Agriculture | Nollet L.,Alltech Biotechnology Center
British Poultry Science | Year: 2011

1. A 56-d experiment was conducted to study the comparative influence of organic and inorganic dietary copper (Cu) sources on growth, blood characteristics and copper accumulation in organs of broilers. 2. A total of 480 Arbor-Acre unsexed broilers were fed on diets containing copper sulphate (CuSO4) or copper proteinate (Cu Pro) at concentrations of 50, 100 or 150 mg/kg of Cu supplementation. The birds were given a broiler starter diet from 1-28 d and a broiler finisher diet from 29-56 d which contained 30·8 mg/kg and 41·1 mg/kg basal copper concentration respectively. Growth performance, blood characteristics and Cu accumulation in organs of the broilers were measured. 3. At 28 d, Cu Pro-fed birds had improved feed conversion ratio compared with CuSO4. At 56 d, birds fed on Cu Pro diets had significantly greater body weight than CuSO4-fed birds. Birds fed on CuSO4 supplemented diets had significantly better feed conversion efficiency. Feed consumptions for the two Cu sources were not significantly different. At no stage did the concentration of added Cu affect the productive traits measured. 4. Cu Pro supplementation increased haemoglobin concentration but reduced plasma triglyceride and plasma cholesterol. Plasma cholesterol decreased as Cu concentration increased. 5. There was a greater accumulation of Cu in the blood, heart, lung, liver and bone of broilers fed on Cu Pro than in those receiving CuSO4. The liver Cu concentration increased as dietary Cu concentration increased. 6. Cu Pro was more effective in promoting growth and reducing blood cholesterol, and was more bio-available in the organs of broilers. © 2011 British Poultry Science Ltd. Source

Zikic D.,University of Novi Sad | Peric L.,University of Novi Sad | Uscebrka G.,University of Novi Sad | Stojanovic S.,University of Novi Sad | And 2 more authors.
African Journal of Biotechnology | Year: 2011

The trial involved 480 Hubbard Classic broiler chicks which were from either mannanoligosaccharide (MOS) fed breeder flock (Bio-Mos, Alltech Inc. USA at level of 1 kg/t) or control fed breeder flock (without MOS). Three groups with four replicates per treatment were formed: control fed breeders/control fed broilers (C/C); MOS fed breeders/control fed broilers (BM/C) and MOS fed breeders/MOS fed broilers (BM/BM). All chicks were fed the same basal diet, except for the inclusion of Bio-Mos (1, 0.75 and 0.5 kg/t in the starter, grower and finisher diet, respectively). The results showed a significant improvement (p<0.05) in the body weight gain with the addition of Bio-Mos in broiler feed. Feed conversion ratio was improved by 0.03 points, but the difference was not significant (P>0.05). The gut morphology examination showed that chick origin (chicks that originated from Bio-Mos fed breeders or control fed breeders) did not influence the morphological parameters of the jejunum in the broiler chickens, but addition of Bio-Mos directly to the broiler feed had a significant influence on the gut morphology and played an important role in processes of digestion and absorption, leading to improved performance. © 2011 Academic Journals. Source

Clausen M.R.,University of Aarhus | Connolly C.,Alltech Biotechnology Center | Skibsted L.H.,Copenhagen University | Stagsted J.,University of Aarhus
International Dairy Journal | Year: 2010

The effect of supplementing dairy cows with organic selenium (25 mg day-1) on oxidative stability of milk when exposed to Cu(II) ions or to fluorescent light was evaluated using solid-phase micro-extraction gas chromatography with flame ionisation detection. Neither formation of volatile lipid (hexanal) and protein (dimethyl disulfide) oxidation products nor radical scavenging activity was affected by selenium supplementation. We found that other factors must be determinant for the oxidative stability of milk, and that these factors vary considerably between individual cows. Milk from two cows that were either sensitive or resistant to oxidation was compared in an attempt to identify the molecular basis for these differences. It was found that oxidation of milk could not solely be explained on the basis of fatty acid composition, or content of low molecular weight antioxidants, such as uric acid, ascorbic acid, and tocopherol. © 2010 Elsevier Ltd. Source

It is widely accepted that inclusion of live yeast in equine diets can increase numbers of fibrolytic bacteria in the hindgut and thus increase overall digestibility of the diet and a more stable hindgut environment. Additionally, it is recognised that horses suffering from laminitis may have impaired hindgut activity and may benefit from dietary yeast inclusion. Little work has been carried out examining the effects of adding live yeast to forage-only diets in the horse. The aim of this study was to examine the effects on fermentation of the addition of live yeast to varying forage sources using the in vitro gas production technique and using inocula from laminitic horses. Four different forage sources: hay (H), haylage (Hy), red clover silage (RCS) and dried lucerne chop (LC) were incubated in triplicate with or without the addition of live yeast. Substrates were subjected to a pepsin pre-treatment and the extent and rate of degradation were then measured using the gas production technique. Three hundred mg of dried forage were incubated with 30 ml of faecal inocula from laminitic-prone horses with or without 1 mg of live yeast and gas production measured over 96 h. VFA were determined using gas chromatography. Fermentation kinetics were fitted to the model p = a + b (l - e -ct). Mean gas production at 96 h was significantly (P<0.001) increased in all forages following the inclusion of yeast. There was no significant effect on acetate, propionate or n-butyrate. Addition of live yeast to faeces from laminitic-prone horses increased the gas production over mean retention time from all forages. This may be suggestive of increased fibrolytic and lactate-utilising bacterial activity and could potentially prove beneficial for laminitic horses. Further work is needed to establish the full effect of yeast on fibre digestibility and fermentative capacity in vivo in laminitic horses. Source

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