Valor nutricional e energético do farelo de algodão de alta energia ® em rações para suínos

Abstract

Digestibility assay was lead with the objective to determine the nutritional value and the effects of the levels of inclusion of the high-energy cottonseed meal ® for pigs in growing phase. Fifteen crossbred barrows with mean live weight from 30,35 kg were used. The experiment had five days of adaptation period and five days for sampling of feces. The experiment was in a randomized block design, with three treatments and four replicates; the experimental unit was represented by metabolic cage with one animal. The nutritional value was determinate using the methodology of total excrete collection with ferric oxide (2%) in the diet to mark the beginning and the end of the collection period. The experimental treatments were: T1= diet reference the base of corn and soy (RR); T2= RR containing 20% of the cottonseed meal; T3= RR containing of 30% of cottonseed meal. The values of digestibility coefficients of dry matter (CDMS), crude protein (DCPB), ether extract (CDEE), gross energy (CDEB), and values of digestible dry matter (MSD), digestible crude protein (PBD), digestible ether extract (EED), and digestible energy (ED) were: T2; 78,70; 84,58; 53,97; 41,99;73,00; 21,65; and 3,38; 1.971,37 (Kcal/kg), and T3; 69,99; 81,84; 72,41; 53,06; 64,92;20,95; 4,54; and 2.490,49 (Kcal/kg), respectively. No difference (P<0,05) were detected among treatments for values of CDEE, CDEB, EED and ED. However, the inclusion level of cottonseed meal affected the digestibility coefficients of energy, ether extract, digestible energy, and digestible ether extract. These results indicated that the level of thirty percent is more appropriate for estimating the energy digestibility whit value of the 2.490,49 Kcal/kg.