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Effects of Tulsi Leaf Extract on Body Weight Gain in Broiler Production

M. N. Hasan
Department of Pharmacology, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. Mostofa
Department of Pharmacology, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. G. Sorwar
Department of Pharmacology, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. T. Hasan
Department of Medicine, Sylhet Agricultural University, Sylhet, Bangladesh

K. Das
Department of Medicine, Surgery and Obstetrics, Faculty of Animal Science and Veterinary Medicine, Patuakhali Science and Technology University, Dumki-8602, Patuakhali, Bangladesh

D. M. N. Hossain
Department of Medicine, Surgery and Obstetrics, Faculty of Animal Science and Veterinary Medicine, Patuakhali Science and Technology University, Dumki-8602, Patuakhali, Bangladesh

Abstract/ Executive Summary:

The objective of this research was to evaluate the effect of tulsi leaf (Ocimum sanctum) extract supplementation in drinking water as a growth promoter in broiler chickens. A total of 40 Cobb-500 broiler chicks (day-old) were purchased from local hatchery (Nourish Poultry and Hatchery Ltd.). After seven days of acclimatization chicks were randomly divided into two groups, A (n=20) and B (n=20). The group A was kept as a control and not treated. The group B was supplemented with tulsi leaf extract with feed and water. Weekly observations were recorded for live body weight gain up to 5^th weeks and hematological tests were performed at 35^th days age of broiler to search for hematological changes between control (A) and treatment (B) groups. The initial body weight of groups A and B on 1^st day of this experiment were 41.00±1.78 gm and 41.50±2.35 gm, respectively and after 35^th day of experiment final body weight were 1640± 74.83 gm and 1920± 33.91 gm, respectively and economics of production were analyzed and found that net profit per broiler was Tk. 21.46 and Tk. 32.29, respectively. The treatment group B was recorded statistically significant (at 1% level) increased (16.97%) for live body weight than that of control group A. The hematological parameters total erythrocyte count (TEC), erythrocyte sedimentation rate (ESR), packed cell volume (PCV) and hemoglobin (Hb) estimation value of treatment group shows significant difference, while hemoglobin (Hb) estimation does not show significant difference from control group. The results suggest that better growth performance could be achieved in broilers supplemented with tulsi leaf extract.

Keywords: Tulsi, Growth promoter, Broiler

Location: Department of Pharmacology, Bangladesh Agricultural University (BAU), Mymensingh

Start Date: 26-10-2015

End Date: 29-11-2015

Program Area: Animal Health and Management

Commodity: Broiler

Objectives:

The main objective of adding feed additives is to boost animal performance by increasing their growth rate, better-feed conversion efficiency, greater livability and lowered mortality in poultry birds.

Methodology:

This study was executed at the Department of Pharmacology, Bangladesh Agricultural University (BAU), Mymensingh during the period from 26^th October, 2015 to 29^th November, 2015. A total of 40 Cobb-500 broiler chicks (day-old) purchased from a local hatchery (Nourish Poultry and Hatchery Ltd) were used in the experiment. They were kept on the floor in isolated pens and fed commercial ration and water as per instruction. All birds were provided same management conditions like floor space, temperature, relative humidity, ventilation and light. Immediately after entering into the shed all chicks were given vitamin C and glucose to prevent the stress for transportation. The broiler chicks were kept in the same compartment for 7 days and brooding temperature were correctly maintained. Optimum light was provided daily throughout the experimental period. The chicks were brooded at 35^oC during first week and thereafter; the temperature was reduced by 3^oC every week until the temperature reached to the room temperature. The litter management was also done very carefully. The starter and finisher broiler rations were supplied to the broiler chicken appropriately. A weighed amount of the ration was offered to the birds twice a day and the left over feed was collected to calculate feed consumption of the birds. The weight of breast and thigh were recorded along with the vital organs (heart, liver and gizzard) etc. Mature and disease free tulsi leaves were collected from BAU Botanical Garden. After washing, the fresh leaves were cut into small pieces by simple scissors and dried in oven and 20 gm mixed with added water made up to 1 litter. Then boiled it made up to 1 liter and stored in a refrigerator at 4°C to preserve the active ingredients of juice. After 7 days all the 40 broiler chicks were randomly divided into 2 groups A (n=20) and B (n=20). Treatment group B (n=20) received mixture of tulsi leaf extract (2% each in drinking water). All the chicks of treated and control groups were closely observed for 35 days. Broilers chicks of control and treatment groups were weighed with digital weighing machine. The weight of broiler chickens was taken weekly. Mean live weight gains of each group of chicken on 1^st, 7^th, 14^th, 21^st, 28^th and 35^th days were recorded. Blood samples were collected from wing vein of chicken of both control and treated groups at 35^th days to study hematological parameters according to the method described by Lamberg and Rothstein (1977). The data were analyzed statistically between control and treated groups by student’s t-test. The differences were considered statistically significant at 5% level (P<0.05).

Source of Information: Bangl. J. Vet. Med. (2016). 14 (1): 21-25

Article Link (Online Journal): DOI: https://doi.org/10.3329/bjvm.v14i1.28818

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the findings of the present study it can be concluded that supplementation with tulsi leaf extract @ 2ml/L drinking water causes significant increase in live body weight and improvement in weekly weight gain and feed efficiency as compared to that of control group of broiler. Thus tulsi leaf extract supplementation in the broiler rations may be useful for the safe, economical and efficient production of broiler and this formulation could be used as an alternative to commercial growth promoters. However, further studies are essential to assess the impact of these medicinal plants on the quality of broiler meat and immune status to ensure the safety of human consumption.

Knowledge Management: Journal