تعيين قابليت هضم ظاهري مواد مغذي و ميزان انرژي قابل متابوليسم جيره هاي حاوي سطوح مختلف تفاله گوجه فرنگي در جوجه هاي گوشتي

Determination of Apparent Nutrients Digestibility and Metabolizable Energy of Diets with Different Inclusion of Dried Tomato Pomace in broiler chickens

A completely randomize design with 5 treatments and 6 replicates with 6 broiler chicks in each replicate was conducted to investigate the nutritive value of Dried Tomato Pomace (DTP) on broiler chickens performance and nutrient digestibility. DTP was included in a basal diet at 5, 10, 15 and 20 % and chromic oxide was added to the experimental diets at 0.3 % as an indigestible marker. Growth performance, AME, AMEn and nutrients digestibility coefficients of each diet were determined in 21 and 42 d of age. The linear regression equations of AME and AMEn values on rate of inclusion of DTP were calculated. Extrapolation values for the AME and AMEn of DTP at 100% inclusion were carried out. Apparent nutrients digestibility coefficients of DTP were determined by difference method. Birds were fed the diets containing 15 and 20% DTP had lower weight than those were fed 5, 10% DTP and basal diet (P<0.01). Feed intake (g/d) increased with increasing of DTP inclusion in the basal diet (P<0.01). Apparent digestibility of nutrients, and dietary AME and AMEn contents decreased with increasing of DTP to basal diet (P<0.0I). The nutrient digestibility and ME values were higher in 42 than 21 d of age (PO.Ol). A decrease in the digestibility of crude fat and apparent metabolizable energy (AME and AMEn) but, no crude protein and dry matter, with ileum sampling was observed. The means of AME and AMEn values of DTP were calculated by extrapolation were 1,757 and 1,741 kcal/kg, respectively. However, average apparent digestibility coefficients of crude protein, ether extract and dry matter in DTP were 58.10, 66.30 and 67.15%, respectively.