evaluation the effects of tomato pomace and herbal and animal oil sources on performance, carcass characteristics, and bone parameters of heat stressed

to evaluate the effects of supplementation of tomato pomace (tp), canola, soybean and tallow oils on performance, carcass characteristics, and bone parameters of heat stressed broilers, 792 d-old arian broiler were divided to 36 pens. each dietary treatment had 4 replicate with 22 birds each. these factorial experiment (3*3) involved 3 kinds of canola, soybean and tallow oils and 3 levels of 0, 3, and 5 percentage tomato pomace was done in a completely randomized design. the daily heat stress schedule was done from 29-42 days for 5 h (32-34oc). two blood samples from each replicate were gathered at 28 and 42 d. the kind of oils and levels of tp did not affect body weight, feed intake, fcr, production index, energy efficiency ratio, protein efficiency ratio and immune response. the canola oil reduced the relative weight of liver and abdominal fat pre heat stressed birds. the relative weight of spleen, and burs and bone parameters involved diaphysis diameter and external bone layer thickness were improved when heat stressed birds fed canola oil or tp diets. the canola and tp diets decreased abdominal fat in heat stressed birds. therefore experimental diets did not affect performance and immune system. the inclusion of canola oil and tp diets improved spleen, burs, bone parameters and abdominal fat.