Effect of a performance enhancer mixture as replacement for antibiotic growth promoters on production performance, excreta quality and carcass characteristics of broilers (original) (raw)
Related papers
Use of non-antibiotic growth promoter “Grow Power” in commercial broiler diet
Bangladesh Journal of Animal Science, 2015
An experiment was conducted with 160, day old Cobb 500 broiler chicks to evaluate the effect of supplementation of Grow Power (GP) on the performance of broiler. The dietary treatments were control (D 1), Grow Power (D 2), Grow Power plus antibiotic (D 3) and antibiotic (D 4). At 5 th week of age, the body weight of birds at different dietary treatments were 938.75, 1105.00, 1136.25, and 985.00g in the diets of D 1 , D 2 , D 3 and D 4 , respectively. Body weight gain at 2 nd , 3 rd and 4 th week of age were significantly (P<0.05) higher in GP supplemented group (D 2) and GP plus antibiotic group (D 3) than that of control (D 1) and antibiotic (D 4) groups. Feed consumption during the experimental period was 1753.75, 1938.75, 1917.50 and 1774.50g for D 1 , D 2 , D 3 and D 4, respectively. At 2 nd and 3 rd week of age, feed consumption were significantly (p<0.05) higher in D 3 group than the other groups including control. Significantly (P<0.05) better Feed Conversion Ratio (FCR) was found in D 3 (2.03) and D 2 (2.11) groups compared to D 1 (2.31) and D 4 (2.28). At 3 rd , 4 th and 5 th week of age, the Performance Index (%) was significantly higher in D 2 than D 1 and D 4. Meat yield parameter of broilers showed significant (P<0.05) differences in dressing weight, feather weight, shank weight, drumstick weight, neck weight, liver weight and viscera weight. Based on the results obtained from the current study it may be concluded that the inclusion of Grow Power @ 50gm/100kg of mixed feed with or without antibiotic improved the growth of commercial broiler including their FCR and therefore, this product may be considered as an alternative of traditional antibiotic in broiler diet.
2005
Antimicrobial compounds are commonly included in poultry diets for promoting of growth and control of diseases. The European Union banned feed grade antibiotic growth promoters, due to, not only cross-resistance, but also to the risk of possible drugs multiple resistances in human pathogenic bacteria. Only two such drug-related compounds are planned to remain in use (GILL, 1999; BACH KNUDSEN, 2001; SCHWARZ et al., 2001; SHANE, 2001). Feeds containing no chemical additives are increasingly used in poultry nutrition. Therefore, antibiotic growth promoters were discredited by consumer associations as well as by scientists, e.g. the use of most antibiotic growth promoters was banned by the European Union. Consequently, the animal feed manufacturers are exposed to increasing consumer pressure to reduce the use of antibiotic growth promoters as feed additive and find alternatives to antibiotic growth promoters in poultry diets (NEWMAN, 1997; HERTRAMPF, 2001; HUMPHREY et al., 2002). Many s...
A six-week feeding trial was conducted to investigate the effect of prebiotics and probiotics on the performance, carcass characteristics and gut integrity of broiler chickens. Two hundred and fifty one-day-old unsexed Arboracre broiler chicks were randomly allocated into 5 treatment groups of 5 replicates with 10 birds per replicate. A corn-soyabean meal based diet with no prebiotic or probiotic supplement was the control diet (basal diet). Other diets consisted the basal diet with 0.01% antibiotics, 0.06% probiotics (Bio grow promoter), 0.1% probiotics (Gro up) and 0.2% prebiotics. On day 42, birds were weighed and sacrificed by cutting the jugular vein. The weights of the primal cuts and visceral organs were taken and recorded. After flushing out the digesta samples, sections of the ileum (5cm posterior to Meckel’s diverticulum) were removed for ileal morphological measurements. There was no significant difference (P>0.05) on weight of the primal cuts except for head, back and drumsticks which were significantly (P<0.05) improved across the diets. Diets supplemented with probiotics had higher weight of drumsticks (11.21%) than other treatments. Significant (P<0.05) difference was however observed in the weight gain with 0.06% probiotics and 0.1% probiotics having the highest means of 1218.15g and 1163.68g respectively. Supplementation with probiotics or prebiotics had no effect on growth performance, gut morphology and organ weights at the grower phase. It was observed, that birds fed with the two brands of probiotics used had the highest villus height and width than birds fed on other treatments. In summary, dietary inclusion of probiotics had a growth-promoting effect with improved growth performance and intestinal morphology. Probiotic could therefore serve as an alternative growth promoter to antibiotics.
IOSR Journals , 2019
Phytogenic feed additives (PFA), comprising of herbs, spices, essential oils, plant extracts and products derived thereof have gained considerable importance in view of the worldwide ban on the inclusion of antibiotic growth promoters (AGPs) in food animals. PFA have also been reported to influence meat and carcass quality traits in animals. The present study was aimed at comparing the effects of a PFA and an AGP on carcass traits in broilers. A 39-day trial was conducted with an as-hatched flock of 432-day-old Cobb 400 broilers. Chicks were randomly assigned to three dietary treatments with 12 replications per treatment and 12 birds per replicate. The three dietary treatments comprised of a control (basal diet), AGP (basal diet + 225 mg/kg bacitracin methylene disalicylate), and PFA (basal diet + PFA Digestarom ® 150 mg/kg). Although the carcass and breast yield being numerically higher in the PFA group than the control, the thigh yield remained unaffected by diets (P>0.05). Drumstick yield was higher in the AGP and PFA treatments as compared with the control (P=0.002). Weight of the viscera decreased (P=0.004) in the dietary treatments receiving AGP and PFA supplementation. PFA treatment had a lower meat pH compared to the other two treatments. Results reveal that the PFA evaluated was equally effective like the AGP used as regards the carcass traits of broilers, when added to a corn-soybean meal based coccidiostat free broiler diet and hence can serve as an alternative to the AGPs in broilers.
… -australasian journal of …, 2010
A grower broiler experiment (from 14 to 35 days of age) was conducted to study the effect of using two commercial mixtures of organic acids (Galliacid ® and Biacid ®) to substitute antibiotic growth promoter (Eneramycin ®) on performance, carcass characteristics and intestinal microflora. 400 (Ross 308) broiler chicks were used. A basal corn-soybean meal diet were formulated and served as a control treatment. The control diet was supplemented with either 0.06% Galliacid, 0.1% Biacid or 0.02% Eneramycin. Birds fed the Galliacid-supplemented diet had 16% (p<0.001) more gain than the control, while those fed the Biacid-or Enramycinsupplemented diets recorded 3 and 5.5% more gain, respectively. Organic acids mixtures and Enramycin supplementation significantly (p<0.001) improved feed conversion ratio. These results indicated that birds fed either organic acid mixtures or Enramycinsupplemented diets utilized feed more efficiently than those fed the control diet. Galliacid significantly (p<0.01) increased dressing percentage and bursa weight (% body weight). No significant differences were detected on liver, spleen and thymus (% body weight) among treatments. Galliacid or Biacid significantly (p<0.001) decreased intestinal Escherichia coli and Salmonella compared to the control and Enramycin-supplemented diets. Dietary Enramycin significantly (p<0.001) decreased Escherichia coli, but had no effect on Salmonella counts. In conclusion, organic acid mixtures are more efficient than antibiotic growth promoter (Enramycin) in improving broiler performance and decreasing intestinal Escherichia coli and Salmonella spp., and could be successfully used to substitute antibiotic growth promoters in broiler diets. However, not all of the organic acid mixtures gave the same effect either on performance or intestinal bacterial counts.
South African Journal of Animal Science, 2007
A study was conducted to compare the effects of an antibiotic growth promoter (flavomycin) and two herbal natural feed additives (garlic and thyme) with and without a xylanase-based enzyme complex in wheat-based diets on growth performance, carcass parameters, total plasma cholesterol concentration, intestinal traits and the dry matter content of excreta of broiler chickens. A total of 112 day-old male broiler chicks was randomly assigned to eight groups containing 14 chicks each and raised from 1 to 42 days of age. The control group received the wheat-soyabean meal basal diet. In the treatment groups the basal diet was supplemented with one of the following: an antibiotic, thyme, garlic, an enzyme, the antibiotic plus the enzyme, thyme plus the enzyme or garlic plus the enzyme. During the 42-d growth period there were no significant differences in body weight gain, feed intake and feed conversion ratio of the broilers between dietary treatments. Feeding the diet supplemented with the antibiotic plus the enzyme significantly increased hot and cold carcass yields compared to the diets supplemented with thyme, garlic, enzyme and garlic plus enzyme. Total plasma cholesterol concentration, the dry matter content of excreta and the relative weights of the heart, pancreas, liver, gizzard and spleen were not significantly influenced by dietary treatments. The relative weight of the small intestines of the broilers receiving the diets supplemented with the antibiotic, antibiotic plus enzyme, thyme plus enzyme and garlic plus enzyme were significantly less than those of the broilers fed the basal diet and the diets supplemented with thyme, garlic and enzyme. The basal diet and garlic supplemented diet significantly increased the length of the small intestine compared to the other dietary treatments. Broilers receiving the diet supplemented with antibiotic had significantly lower total aerobic bacterial counts in the small intestines compared to those on the other dietary treatments. The combined supplementation of the antibiotic and enzyme resulted in a significantly lower E. coli concentration in the small intestines compared to the basal diet and the other dietary treatments.
Relative efficacy of organic acids and antibiotics as growth promoters in broiler chicken
Veterinary World, 2016
The objective of this study was to evaluate the effect of organic acids as replacer to antibiotics in their various combinations on feed consumption, body weight gain, and feed conversion ratio (FCR) in broiler chicks during different phases of growth. Materials and Methods: Antibiotics and organic acids were incorporated into boiler feed in different combinations to form 10 maize based test diets (T 1 to T 10). Each test diet was offered to four replicates of 10 birds each constituting a total of 400 birds kept for 45 days. Results: Significantly better effect in terms of body weight gain from supplementation of 1% citric acid and 1% citric acid along with antibiotic was observed throughout the entire study, whereas the effect of tartaric acid supplementation was similar to control group. Citric acid (1%) along with antibiotic supplementation showed highest feed intake during the experimental period. Significantly better FCR was observed in groups supplemented with 1% citric acid and 1% citric acid along with antibiotic followed by antibiotic along with organic acids supplemented group. Conclusion: Growth performance of birds in terms of body weight, body weight gain, and FCR improved significantly in 1% citric acid which was significantly higher than antibiotic supplemented group. 1% citric acid can effectively replace antibiotic growth promoter (chlortetracycline) without affecting growth performance of birds.
2014
10 days old “Cobb 500” broiler chicks were used to investigate the influence of probiotics and growth promoter supplementation on growth performance and different hemato-biochemical parameters of broilers. They were randomly divided into three equal groups (n=10). Group A was considered as control, fed only with commercial ration and group B and group C were supplemented with probiotics and growth promoter respectively for the period of 21 days. Body weights were measured at 7 days interval and selective organ weights, total erythrocyte count(TEC), hemoglobin (Hb) concentration, packed cell volume (PCV), AST and ALT values were measured at the end of experiment. Results revealed that body weight was increased significantly (p 0.05) differences were found among groups of A, B, and C in the weight of breast meat, liver, Leg meat and spleen. All weights were increased significantly (p>0.05) both in probiotics and antibiotic growth promoter treated groups as compared to that of contr...
This study was designed to compare the effect of the prebiotic and antimicrobial growth promoter (AGP) on the growth performance, blood constituent, intestinal bacteriology and histomorphometric parameters as well as humeral immunity of broiler chicks. A total of 90 unsexed commercial Cobb chicks were randomly assigned to 3 dietary treatments (control, AGP and prebiotic groups), each group contain 30 chicks. Each group subdivided into 3 replicates, 10 chicks each, and was reared for 42 days. The prebiotic supplemented group showed a significant improvement in growth performance parameters than the control and AGP-supplemented groups. Total leukcocytic count, lymphocyte percent, total protein, total globulin and gamma globulin were significantly increased in the broilers fed on prebiotics. Moreover, prebiotics supplementation significantly reduced heterophil percent, heterophil/ lymphocyte ratio (H/L ratio), albumin/globulin ratio, aspartate and alanine aminotransferase (AST and ALT), uric acid and creatinine compared to the AGP-supplemented group and control group. The AGP-supplemented group exhibited a significant reduction in the total aerobic count than the control and prebiotic-supplemented groups. However, the prebiotic supplemented group showed a significant reduction in the coliform count than the control and antibiotic supplemented groups. The prebiotic supplemented group induced a significant increase in the villus height (VH) all over the small intestine. In addition, it induced a significant increase in villus height: crypt depth ratio in the duodenum and jejunum than the control and antibiotic supplemented groups. However, there were no significant differences among the different groups regard to the crypt depth (CD) in the duodenum and jejunum. Prebiotics could be considered as safe and effective antimicrobial alternatives for broiler chicks’ growth performance, immunity and intestinal bacteriology and morphology.
study was conducted to determine the effect of three different levels of propolis (PR) and antibiotic (Erythromycin, ER) in diets on performance, carcass characteristics, carcass parts and economical evaluation in broiler chicks. A total of 150 one day oldCobb chicks were weighed and randomly allocated into a completely randomized design (five treatments, three replicate groups, ten chicks in each group). The experimental diets were as foll ows; basal diet without supplementation (control), 275 g ER/ton (T1), 500 g PR/ton (T2), 1000 g PR/ton (T3) and 2000g ER/ton (T4). The main results obtained can be summarized as follows: chicks fed basal diets supplemented with PR or ER significantly (P≤0.05) increased body weight and body weight gain. Average of feed intake was not affected by adding ER or PR during overall experiment period (1 -35 days) of age. The best feed conversion ratio, calorie and protein conversion ratio were recorded for the groups supplied with different levels of PR (T2-4). Carcass characteristics (carcass % and total edible parts%) and carcass parts % (Breast, thigh, drumstick and wing %) were non-significantly different for all treatment groups except abdominal fat %, liver %, gizzard %, heart % and giblets %. Supplementation of 275 g ER/ton (T1), 500 g PR (T2) and 1000 g PR/ton (T3) to basal diet the economical efficiency by 28.3, 16.8% and 6.8%as compared to the control diet. In conclusion, supplemental 275 g ER/ton or 500 g PR/ton to broiler chick diets had a positive effect on growth performance and economical efficiency.