الفهرس 
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Abstract
This study was performed at private farm in Sharkia government, in the duration from 27/12/2017 to 7/3/2018, to investigate the effect of replacing yellow corn of mallard duck diets with 20, 25 and 30% olive pulp on growth performance, carcass traits and economic useful from high fiber levels.
A total of 160 one-day old unsexed Mallard ducklings were used in this experiment. All ducks were weighted individually and distributed randomly into four treatments of 40 ducks each. Each treatment was composed of four replicates of ten ducks each and fed on starter and finisher diets containing the same levels of energy and protein and different levels of olive pulp replacing the yellow corn. All ducks were fed on starter diets from 1 to 42 day of age, and then fed on finisher diets from 43 to 70 day of age. Ducks were kept under the same management conditions, vaccination program, temperature and lighting.
Duck groups feeding as following:-
• T1 group: fed on starter and finisher control diets without olive pulp.
• T2 group: fed on starter and finisher diets contain 20 % olive pulp replacing yellow corn.
• T3 group: fed on starter and finisher diets contain 25 % olive pulp replacing yellow corn.