The effect of concentrate- and silage-based finishing diets on the growth performance and carcass characteristics of Suffolk Cross and Scottish Blackface lambs

• Published in: Turkish journal of veterinary & animal sciences Vol. 32; no. 3; pp. 191 - 197
• Main Authors: ALI, Safdar, MUSTAFA, Muhammad I, LATEEF, Muhammad, AKHTAR, Pervez, CHADWICK, John, P, SULTAN, Javed, I
• Format: Journal Article
• Language: English
• Published: TÜBİTAK 01-01-2008
• Subjects: Animal Nutrition (Physiology); Animal Nutrition (Production Responses); besi; büyüme; canlı ağırlık artışı; carcass composition; carcass quality; crossbreds; diets; diyetler; et kalitesi; Et Veren Hayvanlar; feed conversion; feed conversion efficiency; finishing; Food Composition and Quality; Gıda Bileşimi ve Kalitesi; growth; Hayvan Besleme (Fizyoloji); Hayvan Besleme (Üretime Yönelik); karkas bileşimi; karkas kalitesi; koyun; koyun eti; kuzu; kuzu(et); lamb (meat); lambs; liveweight gain; Meat Producing Animals; meat quality; melez ırklar; Scottish Blackface; sheep; sheepmeat; silage; silaj; Suffolk (koyun ırkı); Suffolk (sheep breed); yem çevirimi; yemden yararlanma
• ISSN: 1300-0128

In the present study 48 Suffolk x- Mule (S x M) and 48 Scottish Blackface (SBF) wether lambs were used in a 2 breeds x 2 diets x 4 replications factorial experiment with 6 lambs per pen. Lambs were offered either a concentrate (CONC) finishing diet (DM: 876 g kg"1, estimated ME: 10.9 MJ kg"1 of DM, estimated DUP: 32.4 g kg"1 of DM) ad libitum, together with 100 g hay head"1 day"1, or silage (SİL) offered ad libitum (D value: 67.2), together, with up to 450 g head"1 day"1 of a concentrate supplement (DM: 888 g kg"1, estimated ME: 10.9 MJ kg"1 of DM, estimated DUP: 63.9 g kg"1 of DM). Lambs were slaughtered at estimated MLC fat class 2 to 3L. Both breed and diet had a significant effect on daily live weight gain (DLWG) (S x M: 282 vs. SBF: 210 g; CONC: 383 vs. SIL: 109 g) and the food conversion ratio (FCR) was significantly affected by diet (CONC: 5.3 vs. SIL: 7.7). Breed x diet interactions were significant for both DLWG and FCR. Conformation score was better in the S x M lambs than in the SBF lambs (3.2 vs. 2.6; scale E = 5, P = 1), whereas diet influenced the estimated subcutaneous fat proportion (CONC: 121.5 g kg"1 vs. SIL: 113.2
g kg"1).