Growth Promoters In Broilers Research Articles

English

English

Dietary Supplementation of Mixed Yeast Culture Derived from Saccharomyces cerevisiae and Kluyveromyces maxianus: Effects on Growth Performance, Nutrient Digestibility, Meat Quality, Blood Parameters, and Gut Health in Broilers.

This study aimed to evaluate the effect of dietary supplementation of a mixed yeast culture (MYC; Saccharomyces cerevisiae YJM1592 and Kluyveromyces maxianus TB7258 in a 1:1 ratio) on growth performance, nutrient digestibility, meat quality, blood parameters, and gut health of broiler chickens. In total, 576 one-day-old male broilers (Ross 308) with an average initial bodyweight (BW) of 37±0.51 g were used in a 35-day experiment with a completely randomized design. The broilers were randomly assigned to 3 dietary treatments: CON, basal diet; TRT1, CON + 0.1% MYC; and TRT 2, CON + 0.2% MYC. From days 8 to 21, the feed conversion rate (FCR) was significantly decreased in broilers fed MYC-supplemented diets. From days 22 to 35, BW gain (BWG) significantly increased with increasing MYC concentration. Throughout the experiment, BWG increased (linear effect, P=0.002) and FCR decreased with increasing MYC in the diet. MYC supplementation increased the digestibility of dry matter (DM) in broilers in a dose-dependent manner. Relative organ weight of the bursa of Fabricius linearly increased in broilers fed MYC-supplemented diets. The white blood cell count showed linear and quadratic increases in broilers fed increasing concentrations of MYC. The population of Lactobacillus in the excreta linearly increased P=0.033, whereas that of Escherichia coli tended to linearly decrease (P=0.064) in the MYC groups. This study provides a basis for future research on MYC as a growth promoter in broilers.

Effects of tulsi leaves and ginger solution on growth performance and hematological profiles of broilers

This study was conducted to determine the efficacy of tulsi and ginger as a growth promoter in broilers. A total of thirty day old chicks (DOC) were purchased from CP Bangladesh Ltd. and after seven days divided into three groups (A), (B) and (C). No vaccination schedule was practiced and no antibiotics were added in ration. The (A) group was not supplemented with tulsi and ginger solution in drinking water. The (B) group was supplemented with tulsi solution @ 1ml/litre in drinking water and (C) group was supplemented with ginger solution @ 1 ml/litre in drinking water for consecutive 5 weeks started from 7th day of experiment. Weekly observations were recorded for live body weight gain up to 6th weeks and routine blood test was performed at 21st and 42nd days, to find out hematological changes between control and treatment groups. The FCR value of group (A) was 2.25, in group (B) was 1.99 and in group (C) was 1.90. From this initial study this may be concluded that production of broilers in by using tulsi and ginger was economic than control group. In Bangladesh broilers production is mainly organized by unemployed and its demand is very high because it supports marketing within 35–42 days. Short return of money but major problems is cost of production. The initial body weight (gm) of group (A), (B) and (C) on 7th of day experiment were 168±8.54, 166±7.95 and 166±7.90 gm respectively and after 42nd day of experiment final body weight were 1561±12.10, 1698±12.87 and 1763±13.28 gm respectively. The net body weight gain were 1393±11.07, 1533±11.98 and 1588±12.10 gm respectively and economics of production were analyzed and found that net profit per broiler was 18.82, 36.13 and 42.53 Tk respectively. It is concluded that broiler production by using herbal extract may be profitable and suitable for human consumption.
 Asian Australas. J. Biosci. Biotechnol. 2018, 3 (2), 143-149

Influence of supplementation of black pepper powder through feed in broiler chickens on their growth performance, blood profile, meat sensory qualities and duodenum morphology

A study was conducted to evaluate the black pepper powder (BP) as phytogenic alternative to antibiotic growth promoters in broilers. One-day old broiler chicks (225) were randomly distributed to five treatments with three replicates of each. The dietary treatments comprised basal diet as control (C), antibiotic group receiving 0.1 g/kg of oxytetracycline (AB), 0.5, 1.0, and 1.5% of BP added to basal diet to formulate BPL (low), BPM (medium) and BPH (high) groups. Body weight and feed consumed were recorded weekly and accordingly feed conversion ratio and protein efficiency ratio were calculated. At the end of 5th week, 2 birds per replicate were sacrificed to determine the carcass characteristics, meat sensory evaluation, blood parameters, duodenum morphology and faecal microbial load. The result revealed that inclusion of black pepper powder at 0.5% level improved the weight gain, feed conversion ratio and protein efficiency ratio as compared to other treatments. The dietary regimes failed to affect the carcass parameters studied except the heart weight. Black pepper powder supplementation at all the three level studied improved the appearance, colour and overall acceptability score of meat as compared to control. Blood parameters data revealed improvement in haemoglobin and reduction in triglycerides and cholesterol level in BP supplemented groups as compared to control. BP supplementation affected the fat digestibility and calcium retention. It can be concluded that black pepper has the potential to replace the prevalent antibiotic growth promoters used in broiler chickens.

Application of new generation phytobiotic adiCoxSOL® PF for coccidiosis prophylactics in poultry broilers

The new WHO recommendations aim to help preserve the effectiveness of antibiotics that are important for human medicine by reducing their unnecessary use in animals. In some countries, approximately 80% of total consumption of medically important antibiotics is in the animal sector, largely for growth promotion in healthy animals .Over-use and misuse of antibiotics in animals and humans is contributing to the rising threat of antibiotic resistance. After the ban of antibiotic growth promoters (AGP) in the EU many alternative substances have been investigated for their potential to replace AGPs. Phytobiotics are well known for their pharmacological effects and their wide application in human medicine and are one of the most promising alternatives due to their high content of pharmacologically active compounds. Herbs develop their initial activity in the feed as flavour and, therefore, influence eating patterns, the secretion of digestive fluids and total feed intake. Stimulation of digestive secretions, including saliva, digestive enzymes, bile and mucus is often considered to be one of the important actions of phytobiotics. Last, due to herbs content develop their initial activity in the feed as flavour and influence eating patterns of poultry and swine due to the secretion of digestive fluids and total feed intake. Stimulation of digestive secretions, including saliva, digestive enzymes, bile and mucus is often considered to be one of the important actions of phytobiotics. Experiments with various products conducted with broilers show a clear tendency for improved performance and health status. Significant part of poultry farms in Poland, which are exporters of their products to EU and Asia are more and more often using phytobiotics particularly AdiCox Sol PF® for the prophylactic of subclinical coccidiosis and as a natural growth promoter in broilers. AdiCox PF® contains specially prepared Cinapis alba L., Piper nigrum L., Acorus calamus L., Saponaria officinalis L. Generally have positive effect on villi, nutrient absorption and digestal viscosity. Application of adiCoxSOL® PF solution at 22–25 days of age in broilers in dose of 1 liter per1000 liters of water for 3 days via drinking water. As a result mortality and other typical for coccidiosis clinical signs significantly decreased. Supplementation of AdiCox Sol PF® improved performance due to its positive influence on intestinal microflora and anticoccidial efficacy in broiler chicken.

Comparitve Effects of Moringa Oleifera Pods, Probiotics and Vitamin E/selenium on Body Weight Gain of Abor- Acre Broiler Chickens

Phytonutrients are reliable solutions to public health concerns on antibiotic resistance and adverse effects of synthetic growth promoters. This study evaluated the effects of Moringa oleifera pods and probiotic on the growth performance of broiler chickens. A total of 100-day-old ABOR-ACRE broiler chicks with average weight of 38 grams were purchased from a hatchery in Ibadan and used for this study. The chicks were randomly divided into 4 groups (A, B, C and D). Group A was fed basal diet supplemented with air dried Moringa oleifera pods powder at inclusion rate of 50g/kg, group B fed basal diet supplemented with a commercial probiotic (Bactofort®) at 0.5g/kg, group C that was fed commercial feed and supplemented vit E/Selenium in drinking water while group D fed only commercial feed served as control. Chickens in all groups were served same quantities of feed and water ad-libitum. Birds were vaccinated against Newcastle disease (B1 and la Sota live vaccines-IZOVAC®) on days 7, 14 and 28. The birds were weighed weekly and feed intake evaluated. Data were analyzed using simple descriptive statistics and two-way ANOVA. Results showed significant difference (p<0.05) of weight gain of birds fed M. oleifera and probiotic. M. oleifera pods powder significantly improved live weight gain thus serving as alternative to commercial growth promoters in broilers.

Effect of tulsi (Ocium sanctum) leaves extract as a growth promoter in broiler productio

This study was conducted to determine the efficacy of tulsi (Ocimum sanctum) leaves extract as a growth promoter in broilers from January to June 2013 under Dept. of Pharmacology, Bangladesh agricultural University, Mymensingh-2022, Bangladesh. Fourty number of day old broiler chicks were taken and after seven days divided into two groups A and B. The B group was supplemented with tulsi leaves extract @ 1ml/litre in drinking water. Weekly observations were recorded for live body weight gain up to 5th weeks and blood test was performed at 17th and 35th days age of broiler to study hematological changes between control A and treatment B group. No significant difference in hematological changes was observed in both treatment and control group in 1st week of age but significant change in body weight gain was observed on 35th day. They are 1500 g (control) and 1650 g (treated). The cost of production and economic study was carried out and it was observed that net profit in control group was 5.33 T.K/Kg broiler and in treatment group was 13.33 T.K/Kg broiler. Bacterial sensitivity test was positive in case of Escherichia coli and produced zone of inhibition 0.5 cm and other was negative.Asian J. Med. Biol. Res. June 2017, 3(2): 226-232

Effect of sun dried whole bulb garlic powder on nutrient utilization, blood parameters, duodenum morphology and faecal microbial load in broiler chickens

This experiment was conducted to study the effect of sun dried whole bulb garlic powder (GP) as phytogenic alternative to antibiotic growth promoters in broilers. Day-old broiler chicks (210) were distributed to five treatments with three replicates. Dietary treatments comprised of basal diet as control (C), antibiotic group receiving 0.1g/kg oxytetracycline (AB), 1.0, 1.5 and 2.0% of garlic powder (GP) added to basal diet as GPL (low), GPM (medium) and GPH (high). A metabolism trail was conducted at the end of fifth week to study nutrient utilization pattern. Blood sample of one bird/replicate on 35th day was collected from jugular vein. Small representative pieces of duodenum were collected from each sacrificed bird to study structural changes in the duodenum morphology. Fresh faecal material was collected and same was used to study viable bacterial cell counting. Results revealed that inclusion of GP did not significantly effected the dry matter metabolizability, ether extract digestibility, per cent nitrogen and phosphorus retention. Higher level of garlic supplementation significantly lowered the serum glucose, triglyceride and cholesterol level. Largest villus height in duodenum and improved villus height/crypt depth ratio were observed in 1.5% GP supplemented group. Total bacterial count in 1.5 and 2.0% GP supplemented groups and E. coli count in all the garlic supplemented treatments were statistically comparable with antibiotic fed group. It can be concluded that 1.5% sun dried GP can be used as alternative to antibiotic growth promoters in broilers as well as for producing designer chicken for the consumers.

Evaluation of boldenone as a growth promoter in broilers: safety and meat quality aspects

The object of this study was to evaluate the safety and meat quality criteria in broilers following intramuscular injection of boldenone. Twenty-four broiler chicks, divided into two groups, were used in the present study. Boldenone was injected intramuscularly at a single-dose level of 5 mg/kg body weight into 12 broiler chicks at 2 weeks old; the other 12 chicks were injected with sesame oil and kept as controls. Blood samples were collected from the wing and metatarsal veins after 1, 2, and 3 weeks through the experimental course for hematological and clinic-chemical safety parameters. On the last day, chicks were humanely sacrificed and livers and kidneys were removed for histopathological examination. Breast muscles were also removed to assess meat-quality parameters. Boldenone significantly (p < 0.05) increased total erythrocytic count and hemoglobin and hematocrit values, while mean corpuscular hemoglobin and mean corpuscular hemoglobin concentration indices decreased. Leukogram showed leukopenia, lymphopenia, and granulocytosis (p < 0.05) as compared to control. Hepatorenal biomarkers, including alkaline phosphatase, aspartate aminotransferase, alanine aminotransferase, urea, and creatinine were significantly (p < 0.05) higher than the corresponding control values. Additionally, boldenone significantly (p < 0.05) increased metabolic markers, including total protein, globulins, cholesterol, triacylglycerols, and glucose, with parallel decreases in albumin and albumin/globulin ratio. Degenerative changes were recorded in liver and kidney tissues from chicks treated with boldenone. Muscle samples exhibited raised pH values and higher microbial counts as compared to the corresponding control. These data may discourage the use of boldenone as a growth promoter in broilers due to safety and meat quality reasons.

Effect of sun dried whole bulb garlic powder on growth, carcass characteristics and meat quality of commercial broilers

A study was conducted to evaluate the effect of sun dried whole bulb garlic powder as phytogenic alternative to antibiotic growth promoters in broilers. Day-old broiler chicks (225; IBL 80) were randomly distributed to 5 treatments with 3 replicates. The dietary treatments comprises of basal diet as control, antibiotic group receiving 0.1g/kg of oxytetracycline, 1.0,1.5 and 2.0% of sun-dried whole bulb garlic powder (WBGP) added to basal diet. Daily feed intake, weekly body weight and residue left any were recorded to calculate the feed conversion and protein efficiency ratios. At the end of fifth week 2 birds / replicate were sacrificed to determine the carcass characteristics and meat sensory evaluation. Results revealed that supplementation of WBGP at 1.5% improved the body weight, which is statistically comparable with the antibiotic fed group but the feed conversion ratio was significantly lower in 1.5% WBGP supplemented group than the control and antibiotic groups. Dietary treatment does not significantly influence the carcass characteristics except the relative heart weight. Supplementation of WBGP significantly improved the meat quality parameters as compare to control group. From the results of present study, it is concluded that dietary inclusion of 1.5% sun dried WBGP can be used as phytogenic alternative to antibiotic growth promoters in broilers.

Use of Cichorium Intybus Leaf Extract as Growth Promoter, Hepatoprotectant and Immune Modulent in Broilers

The efficacy of Cichorium intybus (chicory) leaf extract was determined on day-old chicks (n=150) that were distributed in 15 replicates (10 birds/replicate). These replicates were allotted to five treatment groups such that each group received three replicates. Group A (positive control) was offered commercial ration supplemented with antibiotic growth promoter (Enracin) and coccidiostat (Salinomycine) along with water without any supplementation. Group E (negative control) was offered water without supplementation of antibiotic and coccidiostat. Whereas, group B, C and D were offered water containing different concentrations of chicory leaves extract at 5, 10 and 15 ml/L, respectively, extracted in distilled water at pH 7. Supplementation of chicory leaf extract in drinking water of birds exhibited a significantly (P< 0.05) improved weight gain and efficiency of feed utilization. Aspartate Aminotransferase concentration, antibody titer against Newcastle disease, blood glucose, cholesterol level, total leukocyte count (TLC) and hepatoprotective properties were found to be better in treated groups than those of controls. The feed consumption, Alpha Glutamyltransferase, hemoglobin concentration (Hb), Packed Cell Volume (PCV), heterophils count, lymphocytes count and antibody titer against infectious bursal disease remained unaffected. It was concluded that chicory leaf extract can be used an inexpensive, efficient and safe growth promoter in broiler production.

Growth Performance, Blood Constituents and Carcass Traits of Broiler Chicken as Affected by Supplementation of Ashwagandha (Withania somnifera) and Mangrail (Nigella sativa)

A study was conducted to assess the effect of supplementation of Withania somnifera and Nigella sativa powder mixture as alternative to antibiotic growth promoters in broilers. Day old Vencobb-400 chicks (n=210) were distributed into 3 treatments (70 birds per treatment) with seven replicates of ten chicks each using completely randomized design and given basal diet supplemented with 0.5% ashwagandha root and 0.5% mangrail seed powder mixture or supplemented with 0.5% ashwagandha root and 1.0% mangrail seed powder mixture in treatments T1, T2 and T3, respectively. There was no significant difference in BW gain between T2 and T1 groups, however, it was lower in T3 group. The lowest feed intake and FCR was found in T2 group broilers with higher values of EER, PER and performance index were found in group T2. The Hb, PCV and heterophil: lymphocyte ratio was lower (P<0.05) but TLC and MCH concentration was higher (P<0.05) in treated groups than T1. The concentration of glucose and total protein was similar in all the groups. The addition of ashwagandha and mangrail mixture in the diet decreased serum cholesterol level when compared to control. Carcass traits were found to be similar in all the groups. Hence, supplementation of 0.5% W. somnifera root and 0.5% N. sativa seed powder mixture improved the performance of broiler chicken.

Microencapsulated eucalyptol and eugenol as growth promoters in broilers.

Antibiotic growth promoter has been effectively used in poultry production for stimulating growth and preventing diseases. However, the use of antibiotics has been questioned due to the possible appearance of resistant bacteria. Special attention has been paid to the use of essential oils as natural alternatives for antibiotics. We investigated the use of different concentrations of microencapsulated eucalyptol and eugenol in broiler chickens diet as alternative growth promoters for avilamycin. One-day-old male broiler chickens were submitted to 7 different dietary treatments. The eugenol demonstrated strong antioxidant activity and both eugenol and eucalyptol showed antimicrobial activity. The broiler performance showed no significant difference to the group with administration of 10 mg/kg of avilamycin when eucalyptol (500 mg/kg) or eugenol (500 mg/kg) were used separately in diet. Our findings suggest that the microencapsulated phytotherapic agents are a potential alternative to the use of avilamycin as growth promoter in broilers during the broilers growing phase. &nbsp; DOI: 10.14685/rebrapa.v5i1.157 &nbsp;

Effects of aqueous extract of Neem (Azadirachta indica) leaves as growth promoter and anti-colibacillosis in broilers

The study was conducted to determine the efficacy of aqueous extract of Neem leaves against colibacillosis and as a growth promoter in broilers. A total of 40 commercial day-old broiler chicks were randomly divided into four equal groups; viz. A, B, C and D. Group A was kept as non-treated control, Group B and C was treated with 1% Neem leaves in drinking water for six weeks, and colibacillosis was induced at 2nd week in group C and D. In group D, Neem leaves treatment continued from 2nd to 6th week after the colibacillosis induction to compare its antibacterial efficacy to prophylactic effect. Escherichia coli induction rate was 200µl per bird where 1 ml contains approximately 1X106 CFU (Colony Forming Unit). Data were recorded for live body weight, weekly gain in weight and hematological parameters of birds for six weeks. Clinical examination and antibacterial sensitivity studies suggests administration of aqueous extract of Neem leaves significantly (p&lt;0.001) improved body weight gain in the Neem treated groups but did not prevent E. coli induced colibacillosis in broilers.DOI: http://dx.doi.org/10.3329/bjas.v43i2.20715 Bang. J. Anim. Sci. 2014. 43 (2): 138-141

Comparative efficacy of garlic (Allium sativum) and black cumin (Nigella sativa) as growth promoters in broilers

A study was conducted to determine the comparative effect of feeding different levels of garlic and black cumin on growth, feed consumption, feed efficiency and carcass characteristics of Hubbard broiler. Two hundred fifty two Hubbard chicks having uniform body weight were randomly allocated into seven dietary treatments with three replications .The isoproteinous and isocaloric formulated standard starter, grower, and finisher diets were supplemented for 6 weeks with different levels of freshly ground dry garlic and black cumin seeds in order of T1-control, T2- 0.25% garlic, T3- 0.5% garlic, T4- 0.75% garlic, T5- 0.25% black cumin, T6- 0.5% black cumin, and T7- 0.75% black cumin, respectively. The results showed significantly higher cumulative weekly live body weight, body weight gain and feed conversion ratio for broiler fed diet supplemented with 0.5% garlic, followed by diet supplemented with 0.5% black cumin. There was no significant effect of different levels of garlic and black cumin supplementation in diet on carcass characteristics. Furthermore, there was minimum gross expenditure in broiler diet supplemented with 0.25% garlic and maximum in broiler diet supplemented with 0.75% black cumin. However, there was highest gross income and net profit in broiler diet supplemented with 0.5% garlic, followed by broiler diet supplemented with 0.5% black cumin. It is therefore, concluded that inclusion of garlic or black cumin in the broiler rations may be used for economical and efficient production of broilers.

EVALUATION OF USING DIETARY PHYTOGENICS, AS GROWTH PROMOTERS, ON BROILER PERFORMANCE, UNDER NORMAL AND SUBNORMAL TEMPERATURE CONDITIONS

plus 100 ppm of Xtract TM® . At 21days of age, half the birds in each dietary treatment were raised under one of two different ambient temperature treatments, the recommended normal temperature (22-24°C) versus a subnormal temperature (11-17°C), until 35 days of age. The results indicated that rearing broilers under subnormal temperature conditions, from 21 to 35 days of age, had significant negative effects on the production performance, carcass meat yield and immune response, as compared to those reared under normal temperature conditions. Under normal and subnormal temperature conditions, feed supplementation of 100 ppm Xtract TM ® significantly increased final body weight, improved final feed conversion ratio, decreased total mortality rate, enhanced HI titers against Newcastle disease vaccine and consequently increased the profit potential of the birds, as compared to those not supplemented. Feed supplementation with Xtract TM® caused a significant increase in dressing percentage, breast meat, carcass meat as well as a significant decrease in abdominal fat. In addition, the Xtract TM® treated birds had significantly higher intestinal diameter and villus height than non treated ones. These results provide clear evidence to support the idea that the mixture of three phytogenics; carvacrol, cinnamaldehyde and capsicum oleoresin (Xtract TM® ) could be used as cost effective feed additive growth promoter in broilers up to 35 days of age, under normal as well as subnormal temperature conditions. Furthermore, Xtract TM® supplementation alleviated the negative effects of cold stress on production

Comparative Efficacy of Turmeric (Curcuma longa), Amla (Emblica officinalis) and Mangrail (Nigella sativa) as Growth Promoters in Broilers

A study was conducted to compare the efficacy of turmeric (Curcuma longa), amla (Emblica officinalis) and mangrail (Nigella sativa) as herbal growth promoters in broiler chickens. Day old commercial broiler chicks (n=280) were distributed equally into seven groups of 40 chicks each, which were further replicate to five groups of eight each. The chicks were placed on one of seven dietary treatments i.e. basal diet without any supplement (CON) or with turmeric at 0.5 (CL-0.5) and 1.0% (CL-1.0), amla at 0.5 (EO-0.5) and 1.0% (EO-1.0) and mangrail with 0.5 (NS-0.5) and 1% (NS-1.0) levels. The effect of these supplements on feed intake, weight gain, feed conversion ratio, carcass characteristics and on economic return was assessed in a six week study. The herbal group broilers were significantly (P<0.05) higher weight gain and lower FCR than control group broilers. The highest weight gain (2097g) and lowest FCR (1.89) was found in NS-1.0 group. H:L ratio was lowest in EO-1.0 group, however, liver enzymes AST and ALT concentration did not show any significant (P>0.05) differences due to herbal supplementation. No significant (P>0.05) effect of turmeric, amla or mangrail were observed on carcass characteristics of broilers. The net profit per bird and net profit per kg live weight of the birds was significantly (P<0.05) higher in all the treatment groups in comparison to the control group and it was highest in NS-1.0 group. The outcome of this study indicated that 1% mangrail powder had no deleterious effect on bird's health and it improves the weight gain, feed efficiency and economic return in broiler production.

Effect of Cinnamon (Cinnamomum cassia) Powder as a Phytobiotic Growth Promoter in Commercial Broiler Chickens

A study was conducted to evaluate cinnamon (Cinnamomum cassia) powder as a phytobiotic alternative to antibiotic growth promoters in broilers. A total of 210 one-day old broiler chicks (IBL 80) were randomly distributed to five treatments each with three replicates of 14 birds. The dietary treatments comprised of feeding a basal diet as a control (CON), or the basal diet supplemented with either 0.1g oxytetracycline per kg diet as negative control (OXT), or cinnamon powder at low (0.5%; CPL), medium (1.0%; CPM) and high (1.5%; CPH) levels. Body weight and feed consumed were recorded weekly and accordingly feed conversion ratio and protein efficiency ratio were calculated. At the end of 5th week, two birds per replicate were sacrificed to determine the carcass characteristics and sensory evaluation of meat. Supplementation of cinnamon at all the three levels improved (P<0.05) the BW gain in the broilers during starter and overall period, which was statistically comparable to CON and OXT groups. The best FCR was observed in CPH group followed by CPM and CPL groups during the finisher and overall period which was better (P<0.05) than the CON and OXT groups. Dietary treatments did not influence the carcass characteristics significantly. Supplementation of cinnamon powder at all the levels studied improved (P<0.05) the sensory attributes of the meat as compared to CON group meat. Highest (P<0.05) benefit: cost ratio was found in OXT and CPL groups, and it was lowest in CPM and CPH groups. From the result of present study it could be suggested that dietary inclusion of 0.5% cinnamon powder can be used as phytobiotic alternative to antibiotic growth promoters in broilers.

EFFECTS OF TULSI, BLACK PEPPER AND CLOVES EXTRACT AS A GROWTH PROMOTER IN BROILER

This study was conducted to determine the efficacy of tulsi (Vitex negundo) leaves, black pepper (Piper nigrum) and cloves (Curcuma longa) extract (TBC extract) as a growth promoter in broilers. A total of 20 day-old broiler chicks were purchased from Nourish Hatchery and after seven days of acclimatization the chicks were randomly divided into two equal groups A and B. No vaccination schedule was practiced and no antibiotics were added in ration of either group A or group B. Group A served as control without any supplement while group B was supplemented with TBC extract @ 1ml/litre in drinking water. Weekly observations were recorded for live body weight gain upto 6th weeks and blood tests were performed at 21st and 42nd day to find out hematological changes between control A and treatment B group. The food conversion ratio (FCR) in group A was 1.94 while that in group B was 1.87. The result suggests that TBC extract played a vital role in gaining body weight in the treatment group B which gained significantly (p &lt;0.01) higher body weight (1660±32.80 gm) in comparison to control group A (1550±21.20 gm). For the hematological parameters (TEC, PCV, Hb and ESR) no significant change was observed between treatment A and control B group suggesting no side effects of herbal extracts in broiler. From the findings of the present study it can be concluded that the TBC extract is economic and safe in broiler production.DOI: http://dx.doi.org/10.3329/bjvm.v10i1-2.15644

Effects of Nishyinda, black pepper and cinnamon extract as growth promoter in broilers

An extract of nishyinda (Vitex negundo) leaves, black pepper (Piper nigrum) and cinnamon (Cinnamomum verum) (polyherbal extract) were used as growth promoter in broilers. A total of 20 day-old broiler chicks were purchased and after seven days of acclimatization randomly divided into two equal groups. No vaccination schedule was practised and no antibiotics were added in rations. Group A served as control while group B was supplemented with polyherbal extract 1 mL/litre in drinking water. Weekly body weight gain up to six weeks was measured and blood tests were performed at 21 and 42 days. Polyherbal extract significantly (P&lt;0.05) improved weight gain. There was no change in haematological parameters. It can be concluded that the polyherbal extract was safe as a growth promoter in broiler production without adverse effects on chicken health. DOI: http://dx.doi.org/10.3329/bvet.v29i2.14345 Bangl. vet. 2012. Vol. 29, No. 2, 69-77