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Evaluation of pineapple byproduct in finishing pigs feeding
This study evaluated pineapple byproduct in finishing swine diets. In Exp. 1 the apparent total tract digestibility (ATTD) of DM, OM, CP and phosphorus (P) of pineapple byproduct, included in increasing levels in pigs diets, were compared by the difference method. Twenty eight barrows (84.93 ± 1.6 kg of BW) were fed a basal diet or diets formulated by replacing 10, 20 or 30% of the basal diet with the test feedstuff. In Exp. 2, 32 barrows were allotted to 1 of 4 diets with increasing levels (0, 9, 18 and 27%) of pineapple byproduct, with the same CP, AA and available P contents. ADG, ADFI and feed conversion ratio (FCR) were evaluated from 77.85 ± 2.53 kg to 101.25 ± 4.18 kg of BW (phase 1) and from 77.85 ± 2.53 kg to 126.71 ± 8.03 kg of BW (phase 2). In both trials pigs were housed individually, with free access to feed and water. All diets were corn-soybean meal based. In Exp. 1 and in phase 1 of Exp.2 the basal diets provided 3,230 kcal/kg of ME, 155.1 g/kg of CP and 8.29 g/kg of digestible lysine. In phase 2 of Exp. 2 the basal diet provided 3,230 kcal/kg of ME, 139.2 g/kg of CP and 7.48 g/kg of digestible lysine. A complete randomized block design was adopted, each animal was considered an experimental unit and results were submitted to ANOVA and regression analisys. The DM, OM and CP ATTD values of the pineapple byproduct were not affected (P>0.05) by the feedstuff levels of 10, 20 and 30%, which were: 84.69, 83.81 and 86.01%; 88.33, 85.73 and 86.92%; 77.04, 70.65 and 82.01%, respectively. Phosphorus digestibility was linearly decreased (P<0.05), from 59.26 to 32.61%, by the increasing levels of the pineapple byproduct. There were linear decreases (P<0.01) in ADG (13.1% and 21.4% in phases 1 and 2, respectively) and in ADFI (26.3% and 15.1% in phases 1 and 2, respectively) of the pigs as a result of the increasing levels of the feedstuff. In phase 1, pigs fed diet with 9% of pineapple byproduct presented the smallest (P<0.05) FCR (2.49) and the highest (P<0.05) FCR (3.04) was observed in the animals fed diet without the feedstuff. The pineapple byproduct presented high DM, OM and CP ATTD values for pigs, but high levels of the feedstuff in the diets decrease the animals performance.
Keywords: Performance, digestibility, feed restriction