饲养制度对孟加拉国三种基因型本地羔羊生产、胴体和肉质性状的影响

Meat Research Pub Date : 2023-06-30 DOI:10.55002/mr.3.3.59
M. Hashem, M. Mamun, M. Arafath, Aamir Numan, M. Hossain
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摘要

本研究旨在评价两种饲养方式下孟加拉本地羔羊的生产性能、胴体性状和肉质。选取3个地区(贾穆纳盆地、巴林德地区和海岸带)共30头动物进行生产、胴体和肉质属性评价;选取来自3个地区的2个处理组(T1=放牧,T2=圈养)共18头动物,对其产量、胴体和肉质参数进行评价。采用SAS进行统计分析,CRD的统计模型为3*2析因实验模型。DMRT进行均值比较,考虑5%的显著性水平进行分析。基因型和饲养方式均有显著影响(p0.05)。基因型和饲养方式对心脏、脾脏重量%有显著影响(p<0.05)。放牧羔羊的粗蛋白质%、粗脂肪%和粗灰分%较高,而圈养羔羊的干物质含量较高。放牧羔羊的DL、极限pH、煮熟pH和WHC%较高,而圈养羔羊的CL%较高。放牧羔羊表现出更高的嫩度、多汁性和整体可接受性,而圈养羔羊表现出更高的颜色和风味。放牧羔羊的仪器色值L*、a*、b*和饱和度指数显著(p<0.05)升高。不同基因型、不同饲养体系下,JBL相对于CBL和BRL的综合产量、胴体和肉品质的优势有很大差异。综上所述,放牧组对孟加拉国本地羔羊的生产性能、胴体性状、近似成分、理化、感官评价和仪器颜色值均有积极影响,其中JBL优于CBL和BRL。
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Influence of rearing system on the productive, carcass and meat quality attributes among three genotypes of native lambs in Bangladesh
The aim of this study was to evaluate the productive performance, carcass traits and meat quality of native lambs of Bangladesh under two rearing system. Total 30 animals were taken for productive, carcass and meat quality attributes evaluation from three regions (Jamuna Basin, Barind Region and Coastal Belt); and total 18 animals were considered for evaluating productive, carcass and meat quality parameters for two treatment groups (T1= Grazing, T2= Stall Feeding) from each of three regions. Statistical analysis was conducted by SAS where statistical model was 3*2 factorial experimental model in CRD. DMRT was conducted for mean comparison and 5% level of significance was considered for analyses. Both genotype and rearing system had significant effect (p<0.05) on body weight at different rearing systems. Among all genotypes grazing lambs had the highest body weight than stall feeding lambs where CBL shows higher body weight compared to JBL and BRL. The ADG of grazing lambs were found significantly (p<0.01) higher than stall feeding lambs. Dressing % (46.80) was higher in grazing lambs. Genotype and rearing system had significant effect (p<0.05) on blood, head, shoulder, loin wt.% except skin, viscera, leg, pluck, Neck, rack, and shank where only genotype had significant effect but effect of rearing system was non-significant (p>0.05). Genotype and rearing system had significant effect (p<0.05) on heart, and spleen weight%. CP%, EE% and Ash% were found higher in grazing lambs whereas DM was higher in stall feeding. DL, Ultimate pH, cooked pH and WHC% were higher in grazing lambs whereas CL% were higher in stall feeding. Grazing lambs showed higher tenderness, juiciness and overall acceptability whereas stall feeding lambs showed higher color and flavor. Instrumental color values L*, a*, b* and saturation index were found significantly (p<0.05) higher in grazing lambs. Superiority of JBL over CBL and BRL in terms of overall productive, carcass and meat quality attributes largely varied in different genotypes for different rearing systems. It may be concluded that grazing group had positive effects on productive performance, carcass traits, proximate components, physicochemical, sensory evaluation and instrumental color values in three genotypes of native lambs of Bangladesh where JBL performs better compared to CBL and BRL.
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