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Abstrak (Bhs. Indonesia)

Penelitianberjudul ”Pengaruh subsitusi konsentrat dengan tepung bulu ayam olahan terhadap konsumsipakan dan pertumbuhan ayam broiler”. Penelitian ini bertujuan untuk mengetahui pengaruh subsitusi konsentrat dengan tepung bulu ayam olahan terhadap konsumsi pakan dan pertumbuhan ayam broiler. Materi yang digunakan dalam penelitian ini adalah 60 ekor ayam broiler diaklimatisasi selama 1 minggu. Bulu ayam diolah dengan cara direbus terlebih dahulu menggunakan larutan NaOH selama 1 jam, dan difermentasi menggunakan bakteri Bacillus sp MTS, kemudian digiling menjadi tepung, pakan diberikan dalam bentuk pelet. Perlakuan yang diberikan adalah R0: tanpa diberi perlakuan (kontrol), R1: diperlakukan pakan mengandung konsentrat 97% dan tepung bulu ayam olahan 3%; R2:diperlakukan pakan mengandung konsentrat 94% dan tepung bulu ayam olahan 6%;; R3:diperlakukan pakan mengandung konsentrat 91% dan tepung bulu ayam olahan 9%;R4: diperlakukan pakan mengandung konsentrat 88% dan tepung bulu ayam olahan 12%.Parameter utama yang diamati adalah bobot badan ayam pada saat 6 minggu setelah perlakuan.Parameter penunjang yang diamati adalah konsumsi pakan.Pakan konsentrat yang digunakan adalah pakan komersil. Pakan diberikan secara bertahap perminggu dan air minum diberikan secara ad libitum. 
	Hasil analisis varians dengan Rancangan Acak Lengkap (RAL) dan Uji Orthogonal Polynomial menunjukkan bahwa ada pengaruh level tepung bulu ayam olahan berpengaruh nyata (P>0,05) terhadap rataan konsumsi pakan dan bobot badan ayam.Pada pengujian pemberian menunjukan bahwa subsitusi konsentrat dengan  tepung bulu ayam pada level 6% - 12% dalam ransum, menurunkan kosumsi ransum, dan pertambahan berat badan.
	Subsitusi konsentrat dengan menggunakan tepung bulu ayam pada level 3%  - 12% dalam ransum belum memberikan pengaruh positif terhadap kinerja ayam broiler ditinjau dari konsumsi ransum, dan pertambahan berat badan.

Abtrak (Bhs. Inggris)

The research entitled the effect of substitution of concentrate with processed chicken feather meal on feed intake and growth of broiler chickens. The research was aimed to study the effect of substitution of concentrate with processed chicken feather meal on feed intake and growth of broiler chickens.The materials used in this study were 60 broiler chickens acclimatized for 1 week. The feather meals processed first by boiling NaOH solution for 1 hour, and fermented using bacteria Bacillus sp MTS, then ground into flour, the feed was administered in the form of pellets. The chickens were then grouped into 5 treatment groups, with four replications in each group. The treatments were R0: not treated (control), R1: treated diet containing 97% of concentrate and 3% of processed chicken feather meal; R2: treated diet containing 94% of concentrate and 6% of processed chicken feather meal ; R3: treated diet containing 91% of concentrate and 9% of  processed chicken feather meal; R4: treated diet containing 88% of concentrate and 12% of processed chicken feather meal. The main parameters measured were the chicken body weight during 6 weeks after the treatment. The supporting parameters measured were feed intake. The feed concentrate used was avcommercial feed. The feed was given gradually per week and drinking water was provided ad libitum.
	The results of analysis of variance with a completely randomized design (CRD) and Orthogonal polynomial test showed that there was no significant of influence the level of the processed chicken feather meal (P > 0.05) on the average value of feed consumption and body weight of chicken. On testing showed that the provision of substitution of concentrate with a chicken feather meal at the levels of 6% - 12% in the ration, lowered feed consumption, and weight gain.
	The substitution of concentrate using chicken feather meal at the levels of 3% - 12% in the diet had no positive influence on the performance of broiler chickens in terms of feed consumption and weight gain.

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