EVALUATION OF DIFFERENT SOURCES AND LEVELS OF DIET DILUENTS ON BROILERS PERFORMANCE AND CARCASS QUALITY

SUMMARY his study aimed to investigate the effect of wheat bran (WB) and sugar beet pulp (BP) low density feed ingredients sources on the broiler performance and carcass quality. Both WB and BP were evaluated using diet dilution (DD) technique with different levels. Two hundred and seventy unsexed one-day old Arbor Acres broiler chicks were randomly allocated to nine experimental treatments; each treatment contains three replicates of ten chicks each. Control was the1 st treatment, the rest 8 treatments divided in to two main groups of DD first group (2, 3, 4 and 5 treatments) diluted with 2, 3, 4 and 5% wheat bran (WB2, WB3, WB4 andWB5) from the control diets and second group (6, 7, 8 and 9 treatments) diluted with 2, 3,4 and 5% sugar beet pulp (BP2, BP3, BP4 and BP5). The result indicated that, DD with WB significantly recorded the highest starter, finisher and overall body weight (BW) and body weight gain (BWG)and significantly improve feed conversion ratio (FCR). Levels of dilution affected significantly on BW and BWG during all phases. Among all treatments, WB5 showed the highest BW and BWG compared to other treatments. The best FCR significantly was recorded byWB5 compared to all treatments during finisher and overall period. Broilers fed DD with BP were significantly had higher dressing, breast, wing, and drumstick % compared with WB. Increasing levels of DD reflected in increasing dressing%. Using the higher level of DD (5%) reflected in decreased the abdominal fat %. The interaction between DD and their levels showed significantly different on all carcass parameters except edible parts. The broiler fed BP4 and WB5 recorded the highest dressing % compared to all treatments. There was significant interaction between DD and levels in intestine length and index and tibia weight%. Using DD with WB significantly reduced respiration rate (RR) compared BP. However, levels had a significant effect on rectal temperature (RT) and blood oxygen (O 2 ) . The effect of the interaction had impact beneficial effect on decreased RT and RR and increased O 2 . All treatments improve the relative economic efficiency (REE) of production except WB2and the highest one recorded by WB5. Dilution broiler diet with Wheat bran at 3, 4 and 5% and sugar beet pulp at 2, 3 and 4 % improve growth performance, carcass quality, intestine index, economic efficiency, feed coast and REE. Among examined levels the best results recorded by applying 5% WB and 4% BP. broiler chicks require minimal amount of fiber in the diet. Their results showed that data obtained during 11-24 days (grower period) indicated that BP level at 3% was the best compared with 3% oat hulls and control. These results supported the findings of Jimenez-Moreno et al., (2009 a and b) showed that using dietary 3%BP recorded the best growth performance compared to the control during period from 1-25 days. Also, the same results were observed during finisher and total periods. These results agree with Koschayev et al . , (2019) who replaced 4%of chicken diet with dry BP during 21-41 days of age, and reported positive impact on their productivity, the quality of meat products and economics of production. 1.54, 154 and 1.53, respectively). The FCR for broiler fed WB5 significant recorded the best value compared with all treatments during finisher and final phase followed by BW4, BP3, BP2 and BP4 compared control, WB2 and BP5. digestibility