Effect of adding soy lecithin, xylanase and their combination to low energy diet on carcass traits, meat quality, and some blood parameters of broiler chicks.

This study investigated the synergism relationship between lecithin (L) and xylanase (Xyl.) enzyme when applied to low dietary metabolizable energy (ME) on broilers carcass, meat quality some blood parameters. 160 chicks randomly were allocated 5 treatments, each of 32 birds (4 replicates 8 each). The 1st group; fed basal diet without studied supplementation (control). In 2nd group, ME (-150Kcal / kg lower than NRC,1994 recommendation) labeled as NC. 3rd, 4th 5th groups, NC supplied with 0.5g (NC + L), 0.2g Xyl) +0.5g L Xyl), respectively. growth trail lasted 35 days. obtained results show that group Xyl recorded significant increase in carcass %. lowest total saturated fatty acids, cholesterol, LDL triglyceride achieved for lecithin. Moreover, both a decrease plasma triglycerides also, HDL compared control.  In conclusion, addition alone or combination low-energy is more effective lipid profile.