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邵伯鸡屠宰性能测定及肌肉品质分析 总被引：2，自引：0，他引：2
利用90日龄的邵伯鸡商品代肉鸡进行屠宰性能测定和肌肉品质分析.结果显示,90日龄公母平均活重分别为1552.5克和1230.9克;屠宰率分别为89.71%和88.70%;半净膛率分别为83.31%和79.95%;全净膛率分别为71.36%和68.99%.邵伯鸡的胸肌和腿肌的pH值在宰后45分钟时,接近7,呈弱酸性.腿肌的肉色都较胸肌深(P＜0.05).胸肌嫩度显著地优于腿肌(P＜0.01),而在性别间胸腿肌的嫩度差异不显著(P＞0.05).在肌肉品质的化学性状方面,胸腿肌水分含量差异不显著(P＞0.05).胸腿肌的粗脂肪平均含量分别为1.95%和2.49%,胸肌显著低于腿肌(P＜0.01)并且在不同性别间表现为母鸡显著地高于公鸡(P＜0.01).胸腿肌的粗蛋白含量分别为25.6%和24.2%,差异都不显著(P＞0.05).腿肌干物质含量低于胸肌,灰份含量胸肌高于腿肌,但差异均不显著(P＞0.05). 相似文献
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以江苏省家禽科学研究所家禽育种中心崇仁麻鸡♂×(崇仁麻鸡♂×隐性白羽鸡新品系♀)♀(配套1)和固始鸡♂×(崇仁麻鸡♂×隐性白羽鸡新品系♀)♀(配套2)为素材,进行肉用性能试验,结果表明①两配套组合体重差异极显著(P＜0.01),配套2比配套1重109.6克且饲料报酬高0.171;②两配套组合龙骨长、冠长、冠高、胸宽差异不显著(P＞0.05),体斜长、胫长、胫围、胸角差异极显著(P＜0.01),配套2均高于配套1.③两配套组合屠体率、半净膛率、全净膛率、胸肌率、腹脂率差异不显著(P＞0.05),配套1腿肌率显著高于配套2(P＜0.05).④两配套组合胸肌失水率、PH值、肉色、剪切力差异不显著(P＞0.05).总体而言,配套2的肉用性能优于配套1,隐性白羽鸡新品系在优质鸡配套系中应用是可行的. 相似文献
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不同配套系北京鸭的生产性能与血液生化指标特性研究 总被引：3，自引：0，他引：3
试验测定了Z型北京鸭、樱桃谷北京鸭(简称樱桃谷鸭)、法国克里莫北京鸭(简称奥白星鸭)的早期生长发育、饲料转化率、屠体性能和部分血液生化指标.结果Z型北京鸭、奥白星鸭、樱桃谷鸭7周龄的平均体重分别达到3662、3480、3344克,品系间差异极显著(P＜0.01).饲料转化率各组鸭无显著差异(P＞0.05).樱桃谷鸭的胸肉率显著高于奥白星鸭(P＜0.05),腿肉率显著高于Z型北京鸭和奥白星鸭(P＜0.05).根据北京鸭的生长曲线,商品肉鸭的生长期宜分为0～2、3～5和6～7周龄3个饲养阶段. 相似文献
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荞壳菌糠在建昌黑山羊饲料中的应用研究 总被引：2，自引：0，他引：2
选择(120±7)日龄、体况发育正常、体重接近的建昌黑山羊120只,按性别随机分为4组,每组30只进行饲养试验,对照组和试验组日粮的营养水平无显著差异,在对照组和三个试验组日粮中分别添加0%、10%、25%、40%的荞壳菌康进行试验.结果表明,试验Ⅱ组羊只日增重最高,分别比对照组、试验Ⅰ和试验Ⅲ组高出12.44%、13.00%、30.63%,经检验差异显著(P＜0.05);在采食方面,试验Ⅱ组比对照组、试验Ⅰ和试验Ⅲ组分别高出13.7%、12.95%和9.92%,经检验差异显著(P＜0.05);而在饲料转化率方面,对照组、试验Ⅰ和试验Ⅱ组要优于试验Ⅲ组,经检验差异显著(P＜0.05);试验Ⅱ组在胴体重、净肉重指标上显著高于试验Ⅲ组(P＜0.05);屠宰率和净肉率,试验Ⅱ组明显优于试验Ⅲ组(P＜0.05),与对照组、试验Ⅰ组差异不显著(P＞0.05);各组羊只的骨重和眼肌面积差异不显著(P＞0.05);而在肉骨比指标上,试验Ⅱ组显著高于试验Ⅲ组(P＜0.05),其余组间差异不显著(P＞0.05). 相似文献
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试验选用12周龄的雪山鸡1 120只,随机分成7组,每组2个重复(每个重复80只鸡),分别饲喂蛋能水平不同的日粮,从13～19周龄每周测量鸡只体重,计算周增重和料肉比,19周龄进行屠宰性能的观测.试验结果表明:不同蛋能比日粮对雪山鸡的周增重在第13、14、16、18、19周各组间存在显著差异(P＜0.05);不同周龄各组间,体重和累积料肉比无显著差异(P＞0.05);第15、17、19周的周料肉比在各组间存在显著差异(P＜0.05).不同能量水平的日粮,对雪山鸡19周龄屠宰率、半净膛率、全净膛率和腿肌率均无显著影响(P＞0.05),胸肌率和胸腿肌率在第2组和第4组间存在显著差异(P＜0.05). 相似文献
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《中国家禽》2015,(14)
相同条件下饲养的文昌鸡公鸡20只,10周龄时随机平均分为2组,一组进行手术去势,另一组不去势作为对照组。20周龄时测定各组的屠宰性能和肉品质,并测定血清血糖和总脂。结果表明:去势鸡的腹脂重、腹脂率极显著高于公鸡(P0.01),活重、肌间脂肪宽、皮下脂肪厚显著高于公鸡(P0.05),屠体重、半净膛重、全净膛重、胸肌重、腿肌重、屠宰率、半净膛率、全净膛率、胸肌率、腿肌率去势鸡与公鸡差异不显著(P0.05);去势鸡的胸肌和腿肌肌内脂肪含量极显著高于公鸡(P0.01),腿肌内水分含量显著高于公鸡(P0.05),胸肌内水分含量、滴水损失、熟肉率、剪切力、p H值、肉色差异不显著(P0.05);去势鸡血清总脂含量极显著高于公鸡(P0.01),血糖差异不显著(P0.05)。去势可明显提高文昌鸡公鸡的脂肪沉积能力。 相似文献
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黄党散超微粉对肉鸡肌肉品质的影响 总被引：1，自引：0，他引：1
选择健康、体重基本一致的15日龄艾维茵白羽肉仔鸡250羽,随机分为5个处理组,分别添加不同含量的黄党散超微粉剂,探讨其对肉鸡肌肉品质的影响.结果表明,①屠宰率和全净膛率;试验b,c,e组显著高于对照组(P＜0.05),试验d组极显著高于对照组(P＜0.01);半净膛率:试验b,d组显著高于对照组(P＜0.05),试验e组极显著高于对照(P＜0.01);腹脂率:试验组显著低于a组(P＜0.05).②本研究中试验d,e组与对照组相比存在显著性差异(P＜0.05).综合这次屠宰试验的结果来看,日粮中添加黄党散超微粉对屠宰率、全净膛率、半净膛率的影响较明显,对降低腹脂率有明显的效果,还能够显著降低肌肉的滴水损失率. 相似文献
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随机选取60只健康无病的300日龄雷州黑羽鸭,公、母各半,进行屠宰试验及肉品质分析。结果表明,公鸭全净膛率和瘦肉率显著高于母鸭(P<0.05);母鸭腹脂率和皮脂率极显著高于公鸭(P<0.01),而胸肌率却极显著低于公鸭(P<0.01);公、母鸭胸肌肉色(L、a、b值)、腿肌蒸煮损失率和胸肌嫩度均存在极显著差异(P<0.01);母鸭胸肌脂肪含量显著高于公鸭(P<0.05),胸肌和腿肌粗蛋白质含量极显著高于公鸭(P<0.01)。提示,雷州黑鸭屠宰率和全净膛率都较高,母鸭肉质和肌肉营养成分高于公鸭,胸肌优于腿肌。 相似文献
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放养与笼养对宣城麻黄鸡肌肉品质的影响 总被引：1，自引：0，他引：1
试验对20只宣城麻黄鸡在放养和笼养条件下腿部肌肉品质进行了测定,结果表明:(1)笼养组腿肌亮度(L)、黄度(b)分别较放养组高4.23%和32.05%,差异显著(P＜0.05);蒸煮损失、硬度、黏性和咀嚼性分别较比放养组高20.96%、44.38%、35.72%和33.50%,差异极显著(P＜0.01);而pH24、红度(a)、弹性、粘聚性和肌纤维直径,两组差异不显著(P＞0.05).(2)笼养状态下,腿肌肌纤维直径与弹性、咀嚼性相关性均为显著正相关(P＜0.05),与L为显著负相关(P＜0.05);其它肉质指标间均为不显著相关(P＞0.05);放养状态下,腿肌肌纤维直径与弹性、咀嚼性、L相关性均为不显著正相关(P＞0.05),而与蒸煮损失相关性为极显著正相关(P＜0.01),与pH24极显著负相关(P＜0.01);L与蒸煮损失为极显著正相关(P＜0.01),b与弹性为显著正相关(P＜0.05).其它肉质指标间也均为不显著相关(P＞0.05). 相似文献
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魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
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本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
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以国际标准强毒Ｒ株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离ＭＧ,并收集感染鸡所产蛋分离ＭＧ。结果表明,人工感染４８小时后上、下呼吸道及肺已被全面感染,９６小时气囊已被感染,１２０小时输卵管已能分离到ＭＧ,卵巢始终分离不到ＭＧ。人工感染鸡自１４４小时便能在其所产蛋中分离出ＭＧ。药物治疗能在７２小时内消除感染,油乳剂苗则需２４天后逐渐降低蛋内ＭＧ分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内ＭＧ,但以研制的种蛋浸泡剂药浴效果为最好。 相似文献
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REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air. 相似文献
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Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF
Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo. 相似文献