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为探究黑羽番鸭体尺、屠宰性能、蛋品质以及各项指标间的相关性，试验随机选择300日龄的黑羽番鸭40只（公母各半）以及鸭蛋60个，测量体尺、屠宰性能和蛋品质，并对各项指标进行相关性分析。结果显示：黑羽番鸭公鸭体斜长、龙骨长、胸宽、胫长、胫围、半潜水长、髋骨宽均极显著高于母鸭（P<0.01），黑羽番鸭公鸭胸深大于母鸭（P>0.05）；黑羽番鸭公鸭活重、屠体率、全净膛率、半净膛率、腿肌率均极显著高于母鸭（P<0.01），胸肌率高于母鸭（P>0.05）；体尺指标与大部分屠宰性能具有显著或极显著相关性；黑羽番鸭蛋重与蛋壳厚度呈显著正相关（P<0.05）；黑羽番鸭在蛋壳质量方面具有明显优势，蛋重显著大于其他品种。试验表明黑羽番鸭体尺与屠宰性能相关性较高，公鸭产肉性能优于母鸭，黑羽番鸭在蛋重、蛋品质方面明显优于山麻鸭、攸县麻鸭和金定鸭。 相似文献
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本研究以黑羽番鸭为试验素材,探讨填饲期血浆生化指标的变化规律,以及血浆生化指标与产肝性能的关系。结果显示,随着填饲时间延长,黑羽番鸭有关血液生化指标显著升高（P<0.05）;填饲组血液生化指标浓度显著高于对照组（P<0.05）;公番鸭胴体重和肝脏重均极显著高于母番鸭（P<0.01）,公、母番鸭多个血液生化指标差异均不显著（P>0.05）;公、母番鸭肝脏重与血浆中ALT呈极显著正相关（P<0.01）,与血浆中GGT和CHO呈正相关,与血浆中ApoB和LDL-C呈负相关。 相似文献
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《中国畜牧兽医文摘》2012,(9)
为了解七彩山鸡繁殖期的屠宰性能及肉用性能指标的相关性,选用10只300日龄美国七彩山鸡进行了屠宰性能测定和肉用性能指标的相关性分析。300日龄七彩山鸡、公母平均活重分别为1454.64g和1207.4g,差异显著(p0.05);公鸡的半净膛重、全净膛重、胸肌重、腿肌重4项指标均高于母鸡,差异显著(p0.05),其中公母鸡腿肌重差异极显著(p0.01)。屠宰率、全净膛率和腿肌率差异显著(p0.05)。其中腿肌率与全净膛率差异极显著(p0.01)。肉用性能相关性分析:宰前活重与半净膛重、全净膛重、胸肌重、腿肌重之间,半净膛重与全净膛重、胸肌重、腿肌重之间,全净膛重与胸肌重、腿肌重之间,胸肌重与腿肌重之间,腿肌重与腿肌率之间呈极显著正相关(p0.01);半净膛重与腿肌率之间,全净膛重与全净膛率之间,胸肌重与胸肌率之间,腿肌重与全净膛率之间,全净膛率与腿肌率之间均呈显著正相关(p0.05)。 相似文献
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茶花鸡体尺性状和屠宰性能的测定及相关性分析 总被引：3，自引：0，他引：3
《中国家禽》2016,(2)
对60只20周龄的茶花鸡进行体尺及屠宰性能测定,并对所有测定性状间的相关性进行了分析。结果表明:茶花鸡的平均活重、屠体重、半净膛重、全净膛重、胸肌重、腿肌重分别为864.81 g、765.55 g、679.23 g、563.81 g、133.35 g、98.49 g,屠宰率88.52%,半净膛率78.65%,全净膛率65.34%,胸肌率23.41%,腿肌率17.58%。相关分析结果表明体尺性状与屠宰性能间存在极显著或显著相关,其中:体斜长、龙骨长、胸深、胸宽、胫长、胫围均与屠体重、半净膛重、全净膛重呈极显著正相关(P0.01),骨盆宽与腿肌重呈极显著正相关(P0.01),胸宽与腿肌重呈显著正相关(P0.05),胫围与胸肌重呈显著正相关(P0.05)。 相似文献
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《中国家禽》2015,(21)
试验对已选育三个世代的优质型肉鸭进行杂交,测定杂交肉鸭70日龄生长性能、屠宰性能,并对各指标进行相关性分析。结果表明:公母鸭体重、胫长、半潜水长、腿肌率差异极显著(P0.01),体斜长、龙骨长、胸宽、胸深差异显著(P0.05);体重与半潜水长、龙骨长、胸宽、胫长、胫围、体斜长、胸深均呈极显著正相关(P0.01);屠宰率与半净膛率和全净膛率、半净膛率与全净膛率、胸肌率与腿肌率、腿肌率与皮脂率和瘦肉率、腹脂率和皮脂率呈极显著正相关(P0.01),腿肌率与皮脂率、腹脂率和瘦肉率之间呈显著负相关(P0.05)。试验结果可为今后选育目标和选育方法的制定提供依据。 相似文献
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利用8个微卫星标记测定半番鸭亲本间的遗传距离,并分析了亲本遗传距离与半番鸭主要经济性状的相关关系.结果表明：亲本间微卫星标记遗传距离与杂交后代日增重相关程度较高,相关系数0.9285～0.9978;与饲料转化率呈负相关关系,相关系数-0.7838～-0.8965;与10周龄的半净膛率和全净膛率呈正相关,相关系数0.9094和0.8838;与胸肌率、皮脂率和腹脂率也呈强正相关,相关系数0.9027、0.9378和0.7983,与腿肌率则呈强负相关,相关系数-0.8898. 相似文献
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为了解法国番鸭生长性能和肉用性状特点,选取65日龄法国番鸭公、母各15只,测定体尺性状和屠宰性能。结果表明:法国番鸭公鸭的体尺和肝脏重明显高于母鸭。法国番鸭公鸭的活重与胸宽、半潜水长、胸肌重、腿肌重和头重呈显著正相关(P0.05),与骨盆宽、屠体重、全净膛重、半净膛重、腹脂重和肝重呈极显著正相关(P0.01)。公鸭肝重与胸宽呈显著正相关(P0.05),与骨盆宽呈极显著正相关(P0.01)。母鸭活重与腹脂重和心脏重呈显著正相关(P0.05),与体斜长、胫长、屠体重、全净膛重、半净膛重、胸肌重和肝重呈极显著正相关(P0.01),母鸭肝重与胫长呈显著性正相关(P0.05)。法国番鸭的屠宰性能与骨盆宽和胫围相关性较强。研究结果为开发和利用法国番鸭提供了科学依据。 相似文献
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为了研究塞北兔生长性状及屠宰性能,试验选择13周龄塞北兔,采用直接和间接关系进行分析。结果表明:塞北兔宰前活重与胸围呈极显著正相关(P<0.01),与体重呈中等程度正相关(P<0.05);全净膛重与体重、胸围、宰前活重呈极显著正相关(P<0.01),与体长呈中等程度正相关(P<0.05);屠宰率与宰前活重、全净膛重呈极显著正相关(P<0.01),与胸围、体长呈中等程度正相关(P<0.05)。说明影响宰前活重的生长性状依次为胸围、体重、体长,影响全净膛重和屠宰率的生长性状依次为胸围、体长、体重。 相似文献
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《中国家禽》2016,(10)
为研究盐津乌骨鸡的肉用性能,探讨盐津乌骨鸡屠宰性能与肉品质的关系,试验测定了150日龄盐津乌骨鸡的屠宰性能、肉品质特性,并对屠宰性能与肉品质的相关性进行分析。结果:盐津乌骨鸡公鸡的活重、屠体重、半净膛、全净膛、半净膛率、全净膛率、胸肌重、腿肌重、胸肌率、腿肌率均高于母鸡,且半净膛率、全净膛率、腿肌重、腿肌率均极显著高于母鸡(P0.01),半净膛重与全净膛重显著高于母鸡(P0.05)。相同性别不同部位,公母鸡胸肌pH_(45min)、pH_(24h)、剪切力均极显著高于腿肌(P0.01);不同性别相同部位,母鸡胸肌与腿肌的A值均极显著高于公鸡(P0.01),但公鸡腿肌的失水率显著高于母鸡腿肌(P0.05)。腿肌重与剪切力间差异极显著(P0.01),且半净膛、全净膛与剪切力呈显著正相关关系(P0.05)。 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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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
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乳酸杆菌作为益生菌广泛用于人和动物.本文综述了乳酸杆菌改善宿主健康的机制.乳酸杆菌可通过产生抗菌物质如乳酸、过氧化氢、细菌素,或者通过竞争营养或肠道黏附位点来抑制致病菌;通过诱导黏附素的分泌或阻止细胞凋亡而增强肠道的屏障功能,从而保护肠道.文章重点讨论了乳酸杆菌表面成分(表面蛋白、脂磷壁酸和肽聚糖)与肠道受体(C型凝集素受体、Toll样受体和Nod样受体),阐述了他们结合后启动免疫调节信号,调控肠道免疫功能以发挥改善健康作用的机制. 相似文献
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Billinghurst RC Brama PA van Weeren PR Knowlton MS McIlwraith CW 《American journal of veterinary research》2004,65(2):143-150
OBJECTIVE: To determine whether serum concentrations of biomarkers of skeletal metabolism can, in conjunction with radiographic evaluation, indicate severity of osteochondrosis in developing horses. ANIMALS: 43 Dutch Warmblood foals with varying severity of osteochondrosis. PROCEDURE: 24 foals were monitored for 5 months and 19 foals were monitored for 11 months. Monthly radiographs of femoropatellar-femorotibial and tibio-tarsal joints were graded for osteochondral abnormalities. Serial blood samples were assayed for 8 cartilage and bone biomarkers. At the end of the monitoring period, foals were examined for macroscopic osteochondrosis lesions. RESULTS: Temporal relationships were evident between certain serum biomarkers and osteochondrosis severity in foals during their first year. Biomarkers of collagen degradation (collagenase-generated neoepitopes of type-II collagen fragments, type-I and -II collagen fragments [COL2-3/4C(short)], and cross-linked telopeptide fragments of type-I collagen) and bone mineralization (osteocalcin) were positive indicators of osteochondrosis severity at 5 months of age. In foals with lesions at 11 months of age, osteochondrosis severity correlated negatively with COL2-3/4C(short) and osteocalcin and positively with C-propeptide of type-II procollagen (CPII), a collagen synthesis marker. Radiographic grading of osteochondrosis lesions significantly correlated with macroscopic osteochondrosis severity score at both ages and was strongest when combined with osteocalcin at 5 months and CPII at 11 months. CONCLUSIONS AND CLINICAL RELEVANCE: The ability of serum biomarkers to indicate osteochondrosis severity appears to depend on stage of disease and is strengthened with radiography. In older foals with more permanent lesions, osteochondrosis severity is significantly related to biomarker concentrations of decreased bone formation and increased cartilage synthesis. 相似文献