ABSTRAK Penelitian ini bertujuan untuk mengetahui pengaruh penambahan air rebusan kunyit dalam air minum terhadap bobot relatif saluran pencernaan ayam broiler. Ayam broiler umur satu hari (DOC) 200 ekor dengan bobot badan awal rata-rata 41,48±0,99 gram dialokasikan secara acak ke dalam 5 perlakuan dan 5 ulangan, dimana setiap ulangan terdiri 8 ekor. Lima perlakuan tersebut terdiri dari T0 (100% air minum), T1 (75% air minum: 25% air kunyit), T2 (50% air kunyit: 50% air minum), T3 (75% air

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... t: 25% air minum) dan T4 (100% air kunyit). Pakan komersial untuk broiler dan air minum perlakuan diberikan secara ad libitum. Parameter yang diamati yaitu bobot relatif dan panjang relatif saluran pencernaan ayam broiler umur 35 hari. Hasil penelitian menunjukkan bahwa penambahan air kunyit dalam air minum tidak berpengaruh nyata (P>0,05) terhadap bobot hidup ayam broiler, bobot relatif tembolok, proventikulus, usus halus, hati, usus besar, serta panjang relatif jejenum, sekum dan usus besar. Perlakuan tersebut berpengaruh nyata (P<0,05) terhadap bobot relatif sekum dan pankreas, serta panjang relatif duodenum dan ileum ayam broiler umur 35 hari. Penambahan air rebusan pada taraf 50-100% menurunkan baik bobot relatif sekum dan pankreas dan panjang relatif duodenum, dan pada taraf 25% bobot relatif sekum dan pankres dan panjang relatif duodenum dan ileum sama dengan kontrol tanpa pemberian air rebusan kunyit. Dapat disimpulkan bahwa penambahan air rebusan kunyit dalam air minum menurunkan bobot relatif sekum dan pankreas serta panjang relatif duodenum, maka dianjurkan untuk tidak menggunakan air rebusan kunyit dalam air minum. ABSTRACT The aim of this study was to determine the effect of the addition of turmeric water in drinking water to relative weight of the digestive tract of broiler chickens. Two hundreds day old chicks with an average body weight of 41.48 ± 0.99 gram were randomly assigned into 5 treatments and 5 replication, each replicate consisted of 8 birds. The treatments consisted of T0 (100% drinking water), T1 (75% drinking water: 25% turmeric water), T2 (50% turmeric water: 50% drinking water), T3 (75% turmeric water: 25% drinking water) and T4 (100% turmeric water). Feed and water were given in free access. The relative weight and relative length of digestive tract were determined at 35 days. The results showed that addition of turmeric water in drinking water had no significant effect (P>0.05) on broiler life weight, relative weight of crop, proventiculus, small intestine, liver, colon, and relative length of jejunum, and colon. However there was significant (P<0.05) effect on the relative weight of the cecum and pancreas, and the relative length of duodenum and ileum. Addition of 50-100% turmeric water in drinking water lowered relative weight of secum and pancreas, and relative length of duodenum. At 25% turmeric water the relative weight of secum and pancreas dan relative length of duodenum dan ileum is similar to control group. It can be concluded that addition of turmeric water in drinking water lowered the relative weight and length of several part of digestive tract and it is advisable not to use it.