Comparison of growth performance and carcass traits of native lambs in Bangladesh

Meat Research Pub Date : 2022-08-31 DOI:10.55002/mr.2.4.28
MH Mobin, M. Hossain, M. Azad, Md. Mizanur Rahman, M. Hashem
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Abstract

The aim of this study was to compare the productive and carcass traits of native region lambs of Bangladesh. A total 30 lambs were taken for productive performances from three regions (Jamuna basin, Barind region and Coastal belt) and total 27 lambs were considered for evaluating carcass traits parameters for 3 treatment groups (T1= 6 months, T2= 9 months, T3=12 months). Statistical analysis was conducted by SAS where statistical model was 3×2(growth performance) and 3×3 (growth performance and carcass traits) factorial experimental model in Completely Randomized Design (CRD). Both sex and lamb types had significant effect (p<0.05) on body weight at different ages. Among all lamb types, Coastal belt lamb(CBL) had the highest body weight (1.65, 6.55, 12.81, 15.59, and 19.97) kg followed by Jamuna basin lamb (JBL) (1.45, 6.51, 9.48, 13.86 and 17.21) kg and Barind region lamb (BRL) (1.5, 5.69, 8.88, 11.44 and 13.24) kg at birth, 3, 6, 9 and 12 months, respectively. The ADG was significantly higher in JBL and CBL (59.07 and 61.17g/d) than BRL (53.15 g/d). Dressing % was higher in later ages; 9 and 12 months (47.38 and 47.04%). Lamb types and slaughter ages had significant effect (p<0.05) on blood, skin, viscera, head, leg, pluck, neck, shoulder, rack and loin wt. % except shank where only slaughter ages had significant effect but effect of lamb types was not statistically significant (p>0.05). Lamb types (T), slaughter ages (L) and its interaction (T×L) had significant effect (p<0.05) on kidney, liver, heart, lung and spleen wt%. The CBL showed superior performances over JBL and BRL in terms of overall body weight and their carcass traits parameters largely varied in different lamb types for different slaughter ages were the core findings of the present study.
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孟加拉国本地羔羊生长性能和胴体性状的比较
本研究的目的是比较孟加拉国本地地区羔羊的生产和胴体性状。选取3个地区(Jamuna盆地、Barind地区和海岸带)共30只羔羊进行生产性能试验,并将27只羔羊分为3个处理组(T1= 6个月、T2= 9个月、T3=12个月)进行胴体性状参数评价。采用SAS软件进行统计分析,统计模型为完全随机设计(CRD)的3×2(生长性能)和3×3(生长性能与胴体性状)析因实验模型。性别和羔羊类型均有显著影响(p0.05)。羔羊类型(T)、屠宰年龄(L)及其互作(T×L)对肾、肝、心、肺和脾wt%有显著影响(p<0.05)。本研究的核心发现是,CBL在总体重方面优于JBL和BRL,不同羔羊类型、不同屠宰年龄的胴体性状参数差异较大。
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