REPLACEMENT OF SOYBEAN AND MAIZE MEAL IN GOOSE BROILER DIETS BY RAPESEED, WHEAT, BARLEY AND PEA

Formulae of feeding mashes were proposed and tested for the goose broiler production in which extracted soybean and maize meal were fully or partially replaced by rapeseed meal, pea, wheat and barley. Three mixtures were tested on 582 geese of two genotypes of Italian goose with the sex ratio 1 : 1. About 300 goslings of each genotype were housed in a warm rearing house, on deep litter in boxes (2.71 birds/m(2)) till the age of 105 days. Within each genotype the goslings were divided into three groups. From the Ist to the 28th day of age all goslings were fed ad libitum with the starter granular mash, from the 29th to the 105th day with grower pelleted diets, differing in their composition (Tab. I). Mixture No.1 was used as standard. Live weight at the age of 105 days, mortality and total feed consumption were monitored. Traits measured on individuals were analyzed by model (1), traits measured on box basis (mortality and feed consumption) were analyzed according to model (2), where y(ijkl) is the value of the I-th individual of the k-th sex, receiving the j-th diet and belonging to the i-th genotype, y(ij) is the value of the box where birds of the i-th genotype are housed receiving the j-th diet, mu is general mean, gi is the effect of the i-th genotype, vi is the effect of the j-th diet, pk is the effect of the k-th sex, (gv)(ij), (gp)(ik), (vp)(jk), (gvp)(ijk) are the appropriate interaction effects, e(ijkl) the residual effect for models (1) and (2), resp. All calculations were carried out using the procedure GLM of SAS. At the end of experiment the live weight of goose broilers was 5.28-5.63 kg and feed conversion 4.97-5.45 kg/kg LW (Tab. II). The live weight was significantly influenced by sex and diet. Goslings fed experimental mixtures had significantly higher live weight. The feed consumption and mortality were not influenced by the diet at all. The interactions between genotype and diets (genotype x sex, sex x diet and genotype x diet x sex) were not significant. Using native sources of nutrients may considerably reduce the production costs of goose broiler raising (Tab. III).