Effect of diet dilution and quantitative feed restriction on compensatory growth in broiler chicken
2006
Mohammed, S.A. (University of Gezira, Wad Medani (Sudan). Faculty of Agricultural Sciences. Dept. of Animal Science) | Abdalla, H.O. (University of Gezira, Wad Medani (Sudan). Faculty of Agricultural Sciences. Dept. of Animal Science)
An experiment was conducted to study the effect of qualitative (diet dilution) and quantitative (physical) feed restriction on broiler chicken performance. A number of 225 broiler chicks (Ross strain) were randomly assigned to three treatments in a completely randomized design. Treatment 1 was the control, where the chicken were fed on a standard starter mash ad-libitum. Treatment 2 was the quantitative feed restriction, where the chicken were fed on the standard starter mash (Rs 15-21) at a rate of 50% of the quantity consumed by the control. Treatment 3 was the qualitative feed restriction, where the l:hickeri were fed on the starter mash diluted with wheat bran at a ratio of 2 : 1 (RD 15-21) offered at a rate of 75% of the quantity consumed by the control. The experimental diets were offered for one week during the same age 15-21 days of age (DOA). During feed restriction, both restricted groups had significantly (P0.05) lighter body weight than the control. Thereafter, in the first week of realimentation, compensatory growth was observed. At the end of the experiment, the Rs group of birds succeeded in reaching the control final body weight with less feed intake, hence it had the best feed conversion ratio (FCR), compared with the control and the RD group of birds. Both restricted groups of birds had significantly (P0.05) better body composition traits than the control, whereas the RD group attained the best carcass weight, the least abdominal fat pad (AFP) weight and the highest dressing percentage. Low mortality rate was observed in both restricted groups
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