【摘要】：湖羊是世界上稀有的綿羊地方品種,以多胎、早熟、早期生長發(fā)育快、宜舍飼等優(yōu)良性能而著名。為系統(tǒng)了解湖羊生長發(fā)育的基本規(guī)律,更好地開發(fā)利用湖羊這一優(yōu)良地方品種資源,本研究以3,6,12和24月齡湖羊公羊?yàn)閷ο?每個(gè)時(shí)間點(diǎn)隨機(jī)選擇6只,共24只,測定其體重、組織器官及消化道各個(gè)部分重量、腸道長度及肉品質(zhì)相關(guān)參數(shù)。結(jié)果表明,3~6月齡湖羊生長速率最快,6月齡之后逐漸降低;3~6月齡之間心、肝、脾、肺、腎、頭蹄和皮的增長強(qiáng)度隨著日齡的增大而增長,除頭、蹄、皮外,其他內(nèi)臟器官的生長強(qiáng)度逐漸降低,12月齡之后趨于穩(wěn)定;頭、蹄、皮的生長在6月齡之后趨于穩(wěn)定,仍然保持較高的生長強(qiáng)度;瘤胃的生長強(qiáng)度始終大于體重生長強(qiáng)度,小腸的生長始終小于體重,而除直腸外,大腸的生長強(qiáng)度與體重相近。6月齡湖羊公羔與12月齡相比屠宰率、眼肌面積無顯著差異,而6月齡湖羊公羔背膘厚極顯著增高,隨著年齡的增長肉色逐漸變暗。綜合以上各項(xiàng)指標(biāo)認(rèn)為,本試驗(yàn)條件下,6月齡為肥羔生產(chǎn)最佳屠宰日齡。
[Abstract]:Hu Sheep is a rare local breed of sheep in the world. It is famous for its excellent performance, such as multiple births, precocity, fast growth and development in the early stage, suitable for house feeding and so on. In order to understand the basic law of growth and development of Hu sheep and to make better use of this excellent local breed resource, this study took 3,6,12 and 24 month old Hu sheep as objects, and randomly selected 6 sheep at each time point, a total of 24 at each time point, and the results showed that there were 24 male sheep aged 3, 6, 12 and 24 months old at each time point. The body weight, weight of tissues, organs and parts of digestive tract, intestinal length and meat quality were measured. The results showed that the growth rate of Hu sheep was the fastest from 3 to 6 months, and gradually decreased after 6 months of age. (3) the growth intensity of heart, liver, spleen, lung, kidney, head hoof and skin increased with the age of 6 months. Except for head, hoof and skin, the growth intensity of other visceral organs decreased gradually and tended to stabilize after 12 months of age. The growth of the head, hoof and skin tended to be stable after 6 months of age, and the growth intensity was still high. The growth intensity of rumen was always higher than that of body weight, the growth of small intestine was always smaller than that of body weight, but the growth intensity of large intestine was similar to body weight except rectum. There was no significant difference in slaughtering rate and eye muscle area between 6-month-old and 12-month-old Hu male lambs. The backfat thickness of 6-month-old male lambs was significantly higher than that of 6-month-old male lambs, and the flesh color gradually darkened with the increase of age. According to the above indexes, 6-month age is the best slaughtering age for the production of fat lambs.
【作者單位】： 甘肅農(nóng)業(yè)大學(xué)動(dòng)物科學(xué)技術(shù)學(xué)院;蘭州大學(xué)草地農(nóng)業(yè)科技學(xué)院;甘肅省肉羊繁育生物技術(shù)工程實(shí)驗(yàn)室;金昌中天羊業(yè)有限公司;
【基金】：甘肅省科技支撐計(jì)劃(144NKCC049) 現(xiàn)代農(nóng)業(yè)產(chǎn)業(yè)技術(shù)體系建設(shè)專項(xiàng)資金(CARS-39) 高等學(xué)校博士學(xué)科點(diǎn)專項(xiàng)科研基金(博導(dǎo)類)(20130211110033)資助
【分類號(hào)】：S826

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本文編號(hào)：2458552