SEX SEPARATE REARING IN RELATION TO THE PERFORMANCE OF COMMERCIAL BROILER CHICKEN
Loading...
Date
2016-07
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
College of Veterinary Science Assam Agricultural University Khanapara, Guwahati-781022
Abstract
An experiment was carried out on the topic “Sex separate rearing in relation to the performance on commercial broiler chicken”. 210 day-old commercial broiler chicks (Cobb-400 Y) having similar body weight from a single hatch was procured. The straight run commercial broiler chicks were reared from day-old to 21 days of age under standard managmental practices. Sex separation was done by observing the early appearance of comb in case of male birds. At 22 days of age, 180 birds were randomly selected from the flock and it was categorized into three treatment groups viz., T0 (60 Straight run or mixed sex i.e. 30 males and 30 females), T1 (60 males) and T2 (60 females). Each group was divided into 3 replicates with 20 chicks each. The chicks were wing banded and reared under deep litter system of management throughout the experimental period following standard managmental practices. All the birds were offered ad libitum drinking water and commercial feed throughout the experimental period.
During the 6 weeks’ trial period following parameters were studied: body weight, body weight gain, feed intake, feed conversion ratio, broiler performance efficiency index, cost of production, uniformity, survivability, carcass characteristics and organoleptic evaluation.
The final body weight per broiler was highest in T1 (male) group (2509.17 ± 22.24 g) followed by T0 (mixed-sex) group (2322.11 ± 33.38 g) and T2 (female) group (2226.67 ± 19.64 g). The highest weight gains at 6th week was observed in T2 (female) group (281.50 ± 15.41 g) followed by T1 (male) (254.50 ± 18.31g) group and T0 (mixed-sex) (230.87 ± 12.07 g) group. At 4th and 5th week of age the weekly average feed intake was highest in T1 (male) group (915.66 and1509.55 g) followed by T0 (mixed-sex) group (888.83 and 1410.5g) and T2 (female) group (824.66 and 1234.5 g). At 6th week of age the highest feed intake was observed in T2 (female) group (607.166g) followed by T0 (mixed-sex) (495.33g) and T1 (male) (488 g) group.
The overall F.C.R was best in T1 (male) group (1.77, 1.90 and 1.91) followed by T0 (mixed-sex) (1.77, 1.92 and 2.11) and T2 (female) (1.83, 1.94 and 2.15) group.
Broiler performance efficiency index was found to be highest in T1 (male) group (108.15) followed by T0 (mixed-sex) (98.81) and T2 (female) group (87.26). The livability was cent percent in T1 (male) and T2 (female) group. In T0 (mixed-sex) livability was 85 percent.
The cost of production per broiler was higher in T1 (male) group compared to T2 (female) and T0 (mixed-sex) respectively. However, the gross profit per broiler was higher by Rs. 23.21 in T1 (male) group and Rs.14.53in T0 (mixed-sex) as compared to T2 (female) group.
At the final body weight the highest uniformity was observed in T1 (male) (90%) group compared to T2 (female) (80%) and T0 (mixed-sex) (70.17 %) respectively.
The carcass quality traits namely live weight, gizzard percent yield and heart percent yield of different treatment groups did not differ significantly and dressed percent yield, liver percent yield and gizzard percent yield was differed significantly. The dressed percent yield was significantly higher in T1 (male) group (71.56 ± 0.01) compared toT0 (mixed-sex) (70.22 ± 0.05) and T2 (female) (69.31 ± 0.07). The highest liver percent yield was observed in T1 (male) group (1.74 ± 0.13), T2 (female) (1.66 ± 0.03) and T0 (mixed-sex) (1.33 ± 0.03). Significantly higher value of giblet was observed in T1 (male) group (3.17 ± 0.14) compared to T2 (female) (3.06 ± 0.07) and T0 (mixed-sex) (2.70 ± 0.05). Among the cut up parts the neck and breast percent yield showed the significant difference. The highest neck percent yield was observed in T0 (mixed sex) (5.43± 0.24) compared to T1 (male) (4.82 ± 0.10) and T2 (female) (4.54 ± 0.12) compared to T0 (mixed-sex) (36.02 ± 0.58) and T1 (male) (33.75 ± 0.79).
The average score for organoleptic character such as tenderness, juiciness, and overall acceptability of meat of broilers observed no significant difference (P<0.05) except flavor. The flavor was significantly higher in T1 (male) group (7.26 ± 0.09) as compared to T0 (mixed-sex) (7.16 ± 0.07) and T2 (female) (6.89 ± 0.08) group.
Description
Keywords
null