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Abstract Hundred and twenty five unsexed day-old of ROSS broiler chicks were used to study the effect of using fatty acids and distilled fatty acids as energy sources in broiler diets on performance, carcass characteristics, some bone traits, chemical analysis of some tissues, some blood components and economic efficiency of broiler chicks at different periods and overall period. This experiment contained 5 treatments and 25 chicks for each treatment. The experiment lasted from 7 to 35 day-old and contained 5 treatments diets (starter, grower and finisher) contained 2%, 3% and 4% of different traditional and untraditional oil/ fat sources through the 3 different stages, respectively. The sources are; soybean oil (SBO) and palm oil (PO) as traditional dietary oil sources, full fat soy (FFS), Dry fat (DF) and fatty acids mix (FAM) as untraditional oil/fat sources. The experimental period divided into 3 different stages; starter period, starting from 7 to 21 day-old, grower from 22-28 day-old and 29-35day-old, beside to overall period from 7 to 35day-old.All experimental traits and measurements were taken each period. Results of this experiment showed that: 1- Chick performance including LBW, BWG, FI and FCR didn’t significantly differ between treatments at different periods and overall period. 2- Carcass traits were not significantly affected transactions have shown the same results observes with bone traits. 3- Chicks received diet contained FFS treatment had a significant higher CP in thigh meat compared with the other experimental groups including SBO, PO and FAM. Also chicks received diet contained FAM treatment had a significant higher CP in drumstick meat compared SBO. The breast meat containingof %CP were not affected significantly. 4- Both PO and DF treatments recorded significant higher values of EE containingfor EE of breast meat among oil/fat groups. Also chicks received diet contained FFS and FAM treatments had a significant lowest EE in drumstick meat compared with the other experimental groups including SBO, PO, and DF. The thigh meat didn’t have any significant differences between treatments in %EE. 5- There is a significant difference between experimental treatments in all plasma components of chicks. 6- Considering SBO diet as the control diet (100% REE); the simple economic study indicated that PO treatment is the most profitable diet among experimental diets. The secondexperiment The experiment contained basal starter, grower and finisher diets divided into control diet(100% SBM as a basal protein source), beside 4 diets formulated by gradual replacement of dietary SBM of control diet with 12.5% GM, 25% GM, 50%GM and 100% GM. The experiment lasted from 7 to 35 day-old. The 116 experimental period divided into 3 different stages; starter period, starting from 7 to 21 day-old, grower from 22-28 day-old and 29-35day-old, beside to overall period from 7 to 35day-old. Results showed that: 1- Performance traits including LBW at 35 day-old, BWG, feed intake, FCR, ECPU and EMEU showed poorly values with replacement increasing. 2- Carcass (%) significantly decreased with high GM increasing in a linear form. Liver percentage was higher with 100% replacement level. There is a gradual increasing in % gizzard with the GM increase in experimental diet. The 50, 100% SBM replacement groups exhibited a significant higher giblet (%) compared with other experimental groups. Abdominal fat was linearly decreased with dietary GM supplementation. 3- Tibia traits did not show any significant differences between treatments. 4- Experimental treatments didn’t significantly differ in the percentages of CP and EE of breast tissue. The same result is appeared for tibia or drumstick meat. 5- Blood traits didn’t significantly differ between treatments in AST and albumen. 6- The input – output analysis of economic efficiency indicated that there is a linear decreasing in REE with GM increasing. Regardless the statistical analysis of this simple study, it showed that both 50% and 100% SBM replacement groups showed the worst economic diets, especially 100% SBM replacement exhibited the most economic depression (negative value) among groups. The study has shown that each replacement ratios reduced the productive performance metrics therefore advised to do more research in this area to improve the utilization of earning the neighborhood. |