Carcass Percentage of Laying Ducks (Anas platyrhyncos) Supplemented by L-Arginine in Ration and Treated by L-Arginine In-Ovo Injection

Carcass Percentage of Laying Ducks (Anas platyrhyncos) Supplemented by L-Arginine in Ration and Treated by L-Arginine In-Ovo Injection

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This study aimed to measure the effect of L-Arginine supplementation in the ration of laying duck and in-ovo injection of L-Arginine during egg incubation on breast muscle dimensions and carcass percentage of local duck.A total of 500 fertile eggs were obtained from laying ducks fed ration without supplementation of L-Arginine containing 1.04% digestible Arginine and 500 other fertile eggs were obtained from laying ducks fed ration supplemented with 0.25% L-Arginine containing 1.29% digestible Arginine.

The eggs were subjected to 4 treatments with 5 replications.The treatments were: 1) eggs collected from laying ducks fed ration supplemented with 0% L-Arginine and in ovo injected with 0% L-Arginine during egg incubation as a control (P0); 2) eggs collected from laying ducks fed ration supplemented with 0% L-Arginine and in ovo injected with 1.5% L-Arginine during egg incubation (P1); 3) eggs collected from laying ducks fed ration supplemented with 0.25% L-Arginine and in ovo injected with 0% L-Arginine during egg incubation (P2); and 4) eggs collected from laying ducks fed ration supplemented with Wallets 0.25% L-Arginine and in ovo injected with 1.

5% L-Arginine during egg incubation (P3).In-ovo injection of L-Arginine was performed on day 8th of incubation by injection of 1.5% L-Arginine into albumen using automatic syringe with a depth of 10 mm.The 180 day-olds hatched unsexed ducks were divided and moved into the pens according to the treatment groups.At the aged of 8 weeks, a male duck and a female duck from each experimental unit were measured for live weight Treatments - Hot - Cold and carcass weight, then the right Pectoralis major muscle sample was taken for histological analysis of myofibril.

The results showed that supplementation of L-Arg in the ration of laying ducks and in-ovo injection of L-Arginine during egg incubation could increase muscle mass (number, diameter, and surface area) of the myofibril, live weight, and carcass percentage of offspring ducks compared to control offspring ducks.In conclusion, L-Arginine supplementation in the ration of laying ducks and in-ovo injections of L-Arginine into the eggs during incubation could increase breast muscle dimensions and carcass percentage of offspring local ducks.