Abstract
The performance of Arbor Acres broiler breeders (1,296 females; 144 roosters) was evaluated when submitted to the following treatments (T): T1 = feeding at 6:30 a.m. (control); T2 = 50% feeding at 6:30 a.m. and 50% at 3:30 p.m. (dual feeding); T3 = feeding at 11:00 a.m.; and T4 = feeding at 3:30 p.m. Treatments were randomly distributed in 48 pens. There were 27 females and 3 males in each pen and 12 repetitions per treatment. Nutrition and management were as recommended for the commercial strain. It was evaluated age at first egg (AFE), total egg production (TEP), number of days with production above 80% (DAP80), laying peak (P), female mortality (MOR), and gross profit margin (GM) per hen. Data were submitted to analysis of variance and means were compared by Student's t-Test. TEP of T1 (186.3±2.3) and T2 (186.5±1.5) were higher (p 0.10) among treatments. GM per hen was better (p<0.05) in T1 and T2 hens. Control and dual treatments were more efficient than other treatments. It was concluded that it is possible to change conventional feeding management's by the dual feeding system.
Highlights
Kohne et al
Cave (1981) evaluated broiler breeder hens from 24 to 63 weeks of age submitted to different feeding schedules and no differences were seen for egg production
MOR, gross profit margin (GM), parameters of the production curve (XP, P, S and to peak of production (Tp)) and production traits (TEP, at first egg (AFE), at different percentages of production: 50% (AG50), AG60, AG70, AG80 and days with production above 80% (DAP80)) were used to compare treatments by GLM (SAS,1996) according to the ANOVA model: yij = m + ti + eij; where: i=1,4 treatments; j=1,...,12 pens; yij is the value of the ith parameter within the jth pen; m is the overall mean of the parameter in the experiment; ti is the effect of the ith treatment; eij is the experimental error according to a normal distribution with mean zero and constant of variance s2
Summary
Differences in diet composition and in temperature might adversely affect egg production of broiler breeder hens (Robbins et al, 1988). Kohne et al Cave (1981) evaluated broiler breeder hens from 24 to 63 weeks of age submitted to different feeding schedules and no differences were seen for egg production. More frequent feeding decreased weight gain and increased egg mass, indicating that this strategy enhanced nutrient availability for egg production and regulated excessive body tissue deposition. Feeding time had no effect on egg production and weight (Brake, 1998). Work aimed to evaluate the effect of time of feeding on the performance of female broiler breeder during the period of egg production
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