Sains Malaysiana 46(3)(2017): 429–437

http://dx.doi.org/10.17576/jsm-2017-4603-10

Carcass Yield, Non-Carcass Parts, Internal Organs and Meat Quality Characteristics of Karayaka Male Lambs with Different Birth Weight Fed Free-Choice Feeding

(Hasil Bangkai, Bahagian Bukan-Bangkai, Organ Dalaman dan Ciri Kualiti Daging Biri-biri Jantan Karayaka dengan Berat Kelahiran Berbeza Diberi Pemakanan Pilihan Sendiri)

ARDA YILDIRIM^1*, ZAFER ULUTA޲, NUH OCAK³ & MUHAMMET KAPTAN⁴

¹Department of Animal Science, Faculty of Agriculture, University of Gaziosmanpaşa,

Tokat, Turkey

²Department of Animal Production and Technologies, Faculty of Agricultural Sciences

and Technologies, University of Niğde, Niğde, Turkey

³Department of Animal Science, Faculty of Agriculture, University of Ondokuz May?s, Samsun

Turkey

⁴Department of Plant and Animal Production, Gokcebey Mithat Mehmet Canakci

Vocational School, University of Bulent Ecevit, Zonguldak, Turkey

Received: 11 June 2015/Accepted: 4 August 2016

ABSTRACT

In order to investigate the changes in meat quality characteristics and some serum metabolites as well as carcass yield, non-carcass parts, internal organs of lambs as influenced by birth weight (BtW) and feeding system (FS), 28 Karayaka male lambs (150 days of age) obtained from four comparable groups that consisted of seven replicates according to a 2 × 2 factorial arrangement for 2 BtW (low, 4.1 ± 0.06 kg and high, 5.0 ± 0.09 kg) and 2 FS (total mixed ration, TMR and free choice feeding, FCF) were used. After weaning (90 days of age), lambs with low BtW and high BtW were fed individually a TMR ad libitum or fed on the same ingredients (FCF) as that of TMR. The TMR was consisted of 80% of a compound feed and 20% of roughage based on a dry matter basis (140 g crude protein and 10.7 ME MJ/kg). The carcass weight and yield of lambs were not affected by the BtW, FS and BtWxFS interaction. The slaughter body weight, cold carcass weight and yield of FCF-fed lambs were higher than those of TMR-fed animals. The pH₄₅ and shear force of semitendinosus muscle decreased and increased by the FCF systems, respectively. These results showed that BtW of lambs did not affect the studied parameter and that feeding system created more differences in terms of some parameters due to the fact that the FCF lead to improvement in carcass and some meat quality traits.

Keywords: Cafeteria feeding; carcass weight; digestive tract; lamb meat; organ weights

ABSTRAK

Dalam usaha untuk mengkaji perubahan dalam ciri kualiti daging serta sesetengah metabolit serum serta hasil bangkai, bahagian bangkai, organ dalaman biri-biri kerana dipengaruhi oleh berat kelahiran (BtW) dan sistem memberi makan (FS), 28 biri-biri jantan Karayaka (usia 150 hari) diperoleh daripada empat kumpulan perbandingan yang terdiri daripada tujuh replikat mengikut aturan faktoran 2 × 2 untuk 2 BtW (rendah, 4.1 ± 0.06 kg dan tinggi, 5.0 ± 0.09 kg) serta 2 FS (jumlah campuran catuan, TMR dan pilihan pemakanan bebas, FCF) telah digunakan. Selepas cerai susu (usia 90 hari), biri-biri jantan dengan BtW rendah dan tinggi diberi makan TMR ad libitum atau diberi bahan-bahan sama (FCF) seperti TMR secara individu. TMR tersebut terdiri daripada 80% sebatian makanan dan 20% hampas berdasarkan asas bahan kering (140 g protin gentian dan 10.7 ME MJ/kg). Berat bangkai dan hasil daripada biri-biri jantan tidak terjejas oleh interaksi BtW, FS dan BtWxFS. Berat badan penyembelihan, berat bangkai sejuk dan hasil biri-biri jantan diberi makan FCF adalah lebih tinggi berbanding haiwan diberi makan TMR. PH₄₅ dan ricih daya otot separa tendon menurun dan meningkat masing-masing mengikut sistem FCF. Keputusan ini menunjukkan bahawa BtW biri-biri jantan tidak menjejaskan parameter yang dikaji dan sistem pemakanan mewujudkan lebih banyak perbezaan daripada segi parameter yang disebabkan oleh FCF membawa kepada peningkatan dalam bangkai dan sebahagian sifat kualiti daging.

Kata kunci: Berat organ; berat bangkai; daging biri-biri; pemakanan kafeteria; saluran penghadaman

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*Corresponding author; email: arda.yildirim@gop.edu.tr