The Growth and Distribution of Carcass Fat in Fattening Steer of Different Breeds

Abstract

ABSTRAKStudi tentang pertumbuhan dan distribusi lemak karkas dilakukan pada tiga bangsa sapi pedaging kastrasi yang memasuki fase penggemukan. Penelitian melibatkan 23 ekor sapi brahman, 24 ekor hereford dan 22 ekor persilangan brahmanxhereford dengan kisaran bobot hidup 300-600 kg. Model pertumbuhan alometrik Huxley digunakan untuk mengkaji pola pertumbuhan dan distribusi lemak karkas pada potongan daging wholesale. Secara umum, brahman memiliki koefisien pertumbuhan lemak pada potongan-potongan daging wholasale yang nyata lebih tinggi dari hereford dan atau persilangan brahmanxhereford. Sementara, sapi hereford dan persilangan brahmanxhereford memiliki koefisien pertumbuhan lemak yang relatif sama. Perbandingan pada log natural bobot setengah karkas tanpa lemak 75 kg (4.313 kg), hereford memiliki bobot lemak pada sebagian besar potongan daging wholesale yang nyata lebih tinggi jika dibandingkan dengan brahman dan persilangan brahmanxhereford. Brahman dan hereford menunjukkan distribusi bobot lemak pada potonganpotongan daging wholesale yang relatif sama pada log natural bobot setengah karkas tanpa lemak 114 kg (4.733 kg). Sapi persilangan memiliki bobot lemak pada sebagian besar potongan daging wholesale yang nyata lebih rendah jika dibandingkan dengan hereford dan brahman. ABSTRACTThe growth and distribution patterns of carcass fat were investigated in three breeds of beef cattle entering fattening phase. The study involved 23 grass-fed steer Brahman, 24 Hereford and 22 Brahmanx Hereford crosses with a live weight range from 300-600 kg. An allometric Huxley model was used to study the growth and distribution patterns of fat tissue within wholesale cut. �n most cases, Brahmans �n most cases, Brahmans had significantly higher growth coefficients than Herefords and/or BrahmanxHereford crosses while Herefords and BrahmanxHereford crosses had similar growth coefficients in wholesale cuts. At log natural of 75 kg side muscle+bone weight (4.313 kg), Herefords had significantly a higher fat weight within wholesale cuts than Brahmans and BrahmanxHereford crosses. Comparison at log natural of 114 kg side muscle+bone weight (4.733 kg), whilst Brahmans and Herefords were similar in fat weight distribution, the cross-bred steer had lower fat weights than the other two breed groups in almost all wholesale cuts.

Carcass and Non-carcass Components of Priangan and Javanese Fat-tailed Rams Slaughtered at Mature Live Weight

“…Maturity of animals determines for increasing growth of fat instead of muscle. Priyanto & Johnson (2012) reported the pattern differences of carcass fat were determined by cattle breeds. The differences of maturity type of sheep breeds might impact on pattern of fat deposition (McPhee et al, 2008).…”