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The objective of this study were to predict carcass quality characteristics in Bali cattle using ultrasound imagery. The Number of samples were 81 heads of Bali cattle consist of bulls (62 heads) and cows (19 heads) with various age ranging from 1 to 6 years were collected their body weight and carcass qualities including backfat thickness (BF), longissmus dorsi thickness (LD), rump fat thickness (RF), rump thickness (RT), marbling score (MS) and the percentage of intramuscular fat (PIF). Those were estimated using ultrasound performed on 4.5-6,5 MHz frequency with depth of 8.8-13 cm. The BF, LD, MS and PIF measurement were applied on 12th-13th ribs, while the RT and RF measurement were conducted between ischium and illium. MS determination was calculated using Aus-Meat standard, while PIF was analysis based on Deaton and Rouse (2000). Body weight and carcass quality among traits were analyzed using descriptive and correlation procedures. The results showed that performance of body weight and carcass quality differs between Bali bulls and Bali cows, as well as among the age variations. Correlation analyses among traits (body weight and carcass quality) showed strong positive correlation (P<0.05) ranging from 0.291 to 0.938. In conclusion, ultrasound imaging method could be used to estimate carcass quality characteristics in Bali cattle.

ABSTRAKSapi lokal merupakan salah satu andalan untuk memenuhi kebutuhan daging dalam negeri, meskipun tingkat produktivitas dan kualitas dagingnya relatif rendah. Penelitian ini bertujuan mengkaji performa produksi dan kualitas daging sapi lokal yang digemukkan dengan ransum berbasis serealia pada taraf energi pakan yang berbeda. Penelitian menggunakan sapi Sumba Ongole (SO) sebanyak 9 ekor dengan rataan bobot awal 254,67 ± 20,7 kg dan umur sapi I1-I2 (1830 bulan). Sapi dipelihara selama empat bulan dengan perlakuan pakan tiga taraf energi (TDN) berbeda, yaitu ransum energi rendah (ER), energi sedang (ES), dan energi tinggi (ET) masing-masing sebesar 57,88, 63,72, dan 69,67. Kandungan protein dari ketiga ransum tersebut relatif sama, yaitu berkisar 12,4212,96. Parameter yang diamati meliputi performa sapi (konsumsi ransum, pertambahan bobot badan harian, dan konversi ransum), sifat-sifat karkas (bobot karkas, persentase karkas, tebal lemak punggung, dan luas urat daging mata rusuk ke 12/13); serta kualitas daging (nilai pH, daya mengikat air, keempukan, susut masak, marbling score, dan warna daging). Hasil penelitian menunjukkan sapi dengan ransum ET memiliki bobot hidup dan nilai marbling yang lebih tinggi, serta penggunaan ransum lebih efisien dibandingkan dengan ransum ER dan ES. Performa produksi dan kualitas daging sapi lokal dapat ditingkatkan melalui penggemukan dengan ransum berenergi tinggi.Kata kunci: kualitas daging, performa produksi, sapi lokal, taraf energi ransum ABSTRACT Local beef cattle is still the major source of domestic beef consumption, yet their productivity and quality is relatively low. This study was aimed to investigate productivity and meat quality traits of local beef cattle through fattening using cereals based concentrate containing different energy level. Nine Ongole cattle with average initial liveweight of 254.67 ± 20.7 kg and age between I1-I2 permanent incisor teeth were used in the study. They were fattened for four months and alloted into three different energy rations; they were low (ER) 57.88 TDN, medium (ES) 63.72 TDN, and high (ET) 69.67 TDN. The three rations had simmilar protein contents, between 12.4212.96. Observed parameters included cattle performance (ration and nutrition dry mater intake, daily gain, and feed conversion), carcass traits (carcass weight and percentage, fat thickness, and loin eye area at the 12 th rib), and meat quality traits (pH, water holding capacity, tenderness, cooking loss, marbling score, and meat color). The results showed that cattle fed with high energy (ET) ration had the highest body weight and marbling score, and more efficient in feed conversion than medium (ES) and low energy (ER) rations. Local beef cattle productivity and there meat quality could be improve through fattening using high energy cereals based concentrate. Keywords: energy ration, local beef cattle, meat quality, production performance PENDAHULUAN Kebutuhan masyarakat dalam negeri terhadap daging akan terus meningkat seiring dengan peningkatan jumlah pendud...

Respon fisiologis domba dipengaruhi oleh kondisi lingkungan seperti perubahan iklim dan pakan. Terbatasnya lahan pertanian dan padang penggembalaan menyebabkan sulitnya memperoleh rumput sebagai pakan sumber serat. Tujuan dari penelitian ini yaitu untuk mempelajari efek pemberian kangkung kering dan limbah tauge sebagai pakan pengganti rumput terhadap respon fisiologis domba ekor tipis jantan (umur kurang dari 1 tahun) dan palatabilitas limbah tauge dan kangkung kering sebagai pengganti rumput. Perlakuan pakan yang diberikan yaitu P0 (50% konsentrat+50% rumput), P1 (50% konsentrat+50% kangkung kering), and P2 (50% konsentrat+50% limbah tauge). Parameter yang diamati yaitu palatabilitas, suhu rektal, denyut jantung dan laju respirasi. Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap dengan 3 macam perlakuan pemberian pakan dan 4 ulangan. Data yang diperoleh dianalisis dengan ANOVA dan uji lanjut Tukey. Hasil penelitian menunjukan bahwa perlakuan pemberian pakan tidak berpengaruh nyata (P>0,05) terhadap suhu rektal, denyut jantung dan lju respirasi. Palatabilitas pakan yang paling baik adalah pakan P2 (50% konsentrat+50% limbah tauge). Kesimpulan dari penelitian ini, limbah tauge dan kangkung kering memiliki palatabilitas yang baik dan tidak berpengaruh nyata terhadap respon fisiologis domba ekor tipis sehingga dapat digunakan sebagai pengganti rumput.

Twenty-three of indigenous Priangan and Javanese Fat-tailed (JFT) ram breeds were used to evaluate its carcass and non carcass components slaughtered at mature live weight. Five Priangan rams and six JFT rams were slaughtered at 32.5 kg of live weight while six other rams of each breeds were also slaughtered at 40 kg of live weight. Before the rams were slaughtered, they were fattened using pellet ration which was formulated according to NRC for fattening 10 kg of lamb, containing 73.3% TDN and 16% protein in dry matter bases. Feed and water were given ad libitum. Rams were slaughtered and dissected when they reached their assigned slaughter weight (32.5 and 40 kg). The results showed that both breeds had high percentage of carcass (53%-55%) with no significantly different between breeds (P>0.05) either were slaughtered at 32.5 kg or 40 kg. However, carcass of Priangan rams had significantly more muscle, but less fat than Javanese Fat-tailed rams at mature live weight (P<0.05). Non-carcass components were not significantly different between breeds (P>0.05) except for head, tail and testes (P<0.01) and liver (P<0.05). The edible and inedible portion of non-carcass ranged from 30%-32% and 12%-15% of slaughter weight, respectively.