STUDIES ON GROWTH, PRODUCTION & REPRODUCTION TRAITS OF THREE WAY CROSS BIRDS (DBN) UNDER DIFFERENT SYSTEMS OF MANAGEMENT.
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Date
2016
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Birsa Agricultural University, Kanke, Ranchi, Jharkhand
Abstract
The present study was conducted on 600 DBN birds to study the effect of different management systems on growth, feed consumption and feed conversion ratio, age at first lay and age up to 50 per cent egg production, egg quality traits, carcass traits survivability and economics of meat production of DBN birds. The results pertaining to this study are being summarized as below:
The average value of day old DBN birds was 31.27g.
Significant effect of different management system of body weight were observed during whole of the experimental periods in DBN birds.
The body weight of chicks reared under deep litter and semi-intensive system of management were significantly higher than backyard system of management during whole period of the ages under study.
The overall body weight in deep litter system of management was 1547.55g at 20th weeks of age. The corresponding value for semi-intensive and backyard system were 1462.95g and 1207.00g respectively.
There were significant effect of different management system on body weight gain during whole period of the experiment under different system of management.
Monthly body weight gain was observed to be highest in deep litter system followed by semi-intensive and backyard system of management during whole of the experimental periods.
The average monthly body weight gain was 605.60 g at 16th - 20th weeks of age. The corresponding values for semi-intensive and backyard system of management were 406.6g and 280g respectively.
There were more consumption of feed in deep litter system as compared to semi intensive and backyard system of management systems. The average feed consumption (g/4week/bird) increased with increase in age.
The average monthly feed consumption in DBN birds was 542.21 g from 0 – 4 weeks and 996.00g during 4 – 8 weeks of age.
Higher feed consumption was observed in deep litter system than semi-intensive system of management during all the experimental periods.
The average monthly feed consumption of DBN per birds in deep litter system of management at 20th week of age was 1786.52g. The corresponding value for semi-intensive system of management was 1260.46g.
The overall value of feed conversion ratio was estimated to be 3.10 from 0 to 8th weeks of age. The average value of feed conversion ration during 8th to 12th, 12th to 16th and 16th to 20th weeks of age under deep litter system of management was 2.80, 2.85 and 2.95 respectively. The corresponding value of feed conversion ratio for semi-intensive system of management was 2.15, 2.55 and 3.10 respectively.
The average age at first lay under deep litter system of management was 160 days. The corresponding value was 171 and
181 days under semi-intensive and backyard system of management respectively.
The age at 50 percent egg production under deep litter system of management was 195 days. The corresponding value was 203 and 220 days under semi-intensive and backyard system of management.
The blood hemoglobin of DBN birds was observed 16.61mg/dl in deep liter, 9.86 mg/dl in semi intensive and 9.56 mg/dl in backyard system of management.
The blood cholesterol value of DBN birds was observed 190.50 mg% in deep litter, 186.16 mg% in semi intensive and 172.66 mg% in backyard system ofmanagement.
The variation in egg weight, yolk index, shape index, shell thickness and albumin index due to different management systems were found to be significant.
The weight of egg laid under deep litter, semi-intensive and backyard system of management was 45.63g, 44.47g and 39.30g respectively.
The average values of yolk index was 25.025, 24.21 and 23.80 respectively under deep litter, semi-intensive and backyard system of management.
The average value of shape index under deep litter, semi-intensive and backyard system of management were 74.97, 73.96 and 72.79 respectively.
The average values of shell thickness(mm) was significantly higher under deep litter, followed by semi-intensive system and backyard system of management.
The average value of albumin index under deep litter, semi-intensive and backyard system of management were 5.23, 4.98 and 4.6 respectively.
In deep litter system of management, the av. dressing percentage was observed maximum (77.74%) followed by backyard (66.21%) and semi intensive system of management (69.45%). In case of female the values were 67.29 %, 66.21% and 63.79% respectively under deep litter, backyard and semi intensive system of management respectively.
The effect associated with systems of management was observed to be significant in all parameters.
Management systems had no significant effect on all the organoleptic parameters. However, overall acceptability was observed to be highest in backyard system(6.25), followed by semi-intensive(6.10) and deep litter(5.80) system of management.
The survivability percentage of DBN birds under nursery, deep litter, semi-intensive and backyard system of management were 98%, 96%, 97% and 97% respectively.
The average value of fertility percentage of DBN birds was 85.50% in deep litter, 79% in semi intensive and 69% in backyard system of management.
The average value of hatchability percentage on total egg set basis of eggs in DBN birds was observed 74.50%, 69.50% and 59% respectively in deep litter, semi intensive and backyard system of management.
The average value of hatchability percentage on fertile egg set basis of egg in DBN birds was 90.85%, 89.10% in semi intensive and in backyard system, it was observed 83.09% .
Lowest cost of meat production was observed for chicks reared under backyard system of management and highest cost of meat production was observed for chicks reared under deep litter system of management followed by semi intensive system of management.
Description
STUDIES ON GROWTH, PRODUCTION & REPRODUCTION TRAITS OF THREE WAY CROSS BIRDS (DBN) UNDER DIFFERENT SYSTEMS OF MANAGEMENT.
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