ALLOMETRIC GROWTH PATTERNS OF BODY AND CARCASS COMPONENT IN DOCKED AND INTACT KARADI LAMBS

IF 1.1 Q3 AGRICULTURE, MULTIDISCIPLINARY IRAQI JOURNAL OF AGRICULTURAL SCIENCES Pub Date : 2023-08-29 DOI:10.36103/ijas.v54i4.1810
D. Al-Sherwany, J. Alkass, Assit. Prof Prof, Coll. Agric. Engine, Sciences Univ, Salahaddin
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引用次数: 1

Abstract

To study the allometric growth of body and carcass traits, twelve new born Karadi lambs were docked within 3 days of their birth using rubber-rings, and left with their mothers till weaning (2.5 months). Another 12 weaned Karadi lambs obtained from local market were left intact. Following an adaptation period of a week, the docked and intact lambs with an average initial weight of 16.83±1.522 and 19.92± 0.748kg, respectively were randomly divided into three equal groups to be slaughtered at 20, 30 and 40kg. Results revealed that the allometric growth coefficients of both docked and intact lambs of dissectible lean and bone were negative heterogenic (b<1), indicating an early maturing tissues, while the growth of dissectible fat is a late maturing tissues. In both groups, loin, shoulder, foreshank and rack are an early maturing cuts, neck is isogonic, while leg in intact lambs is an early maturing whereas in docked lambs grew at a similar rate to carcass. In docked and intact lambs, carcass fat relative to empty body weight is an early and late maturing tissues, whereas non-carcass fat is isogonic and grew at a similar rate to empty body weight in both groups. The growth of pelt, liver, lung and trachea and heart were isogonic and grew at a similar rate to empty body weight in both groups
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断尾和完整卡拉迪羔羊体和胴体成分的异速生长模式
为了研究体和胴体性状的异速生长,在出生后3天内用橡胶环将12只新生卡拉迪羔羊与母羊分开,直到断奶(2.5个月)。另外12只从当地市场获得的断奶卡拉迪羔羊完好无损。将平均初始体重分别为16.83±1.522和19.92±0.748kg的未断奶羔羊随机分为3组,分别在20、30和40kg时屠宰。结果表明,断骨羔羊和断骨羔羊的异速生长系数均为负异源性(b<1),为早熟组织,而断骨羔羊为晚熟组织。在这两组中,腰部、肩部、前腿和肋骨都是早熟切口,颈部是等线的,而完整羔羊的腿是早熟的,而断肢羔羊的生长速度与胴体相似。在断尾羔羊和完整羔羊中,胴体脂肪相对于空体重是一种早、晚成熟组织,而非胴体脂肪在两组中是等速的,并且与空体重的增长速度相似。两组大鼠的皮毛、肝脏、肺、气管和心脏均呈等速生长,生长速度与空体质量相似
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来源期刊
IRAQI JOURNAL OF AGRICULTURAL SCIENCES
IRAQI JOURNAL OF AGRICULTURAL SCIENCES AGRICULTURE, MULTIDISCIPLINARY-
CiteScore
2.30
自引率
50.00%
发文量
140
审稿时长
6 weeks
期刊介绍: IRAQI JOURNAL OF AGRICULTURAL SCIENCES (IJAS)is the first agric. scientific and refereed journal established in Iraq. The first volume was published in 1966. IJAS is registered in the number 137 in 1988 of the Baghdad National Library. Years ago, it was published with one issue a year. For the time being, it is published bimonthly (6 issues for a volume). IJAS Deal with: Field Crops. Plant Breeding. Agricultural Economics. Agricultural Extension. Agricultural Mechanization. Basic sciences. Hort. Sciences. Animal Husbandry. Food Technology, Plant Pathology. Plant Entomology. Poultry Sciences. Soil Sciences. Water Resources. Veterinary. Biology.
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