This study aims to determine the application of Bidara leaves (Ziziphus mauritiana) as a feed additive at different percentages of carcasses, abdominal fat, and internal organs in Raja ducks. This study used 80 DOD Raja ducks. This study used an experimental method with a randomized block design (RBD) consisting of 4 treatments and 5 groups. Treatment of Bidara leaf plants A(0%), B(1%), C(2%) and D(3%). The results showed that the use of Bidara leaves as a feed additive, using a percentage of 2% was the best for carcass percentage of 66.79%, abdominal fat percentage of 0.78%, liver percentage of 2.27%, and proventriculus percentage of 0.42%. Efficient in using Bidara leaf plants against Raja ducks. The conclusion of this study showed that the use of Bidara leaves as a feed additive at different percentages had significance on the abdominal fat carcasses and internal organs of the Raja duck, but had nonsignificant on the proventriculus organs.
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