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八点黑獭兔肌肉营养特性的研究 总被引:2,自引:1,他引:1
试验通过对八点黑獭兔肉样中蛋白质、脂肪、灰分和水分指标的测定.研究不同性别、不同年龄八点黑獭兔肌肉营养学特性.结果表明:水分含量随年龄的增长而减少,且60日龄与180日龄间差异极显著(P<0.01),雄兔高于雌免;灰分含量随年龄的增长呈上升趋势.雄兔低于雌兔;蛋白质含量随年龄的增长而增加,且60日龄与180日龄之间存在差异显著(P<0.05),雄兔高于雌兔;脂肪含量随年龄的增长而增加,且60日龄与90日龄之间差异不显著(P>0.05),而180日龄与前两者都存在极显著差异(P<0.01),雌兔高于雄兔.獭兔肌肉的营养学特性受年龄和性别等因素的影响而呈现差异性. 相似文献
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獭兔又名力克斯兔。其被毛柔软光滑整齐 ,富有弹性 ;皮板较厚而结实。獭兔肉鲜可口 ,营养价值高 ;兔头、内脏、血是医药和生物制品的原料。獭兔的繁殖能力惊人 ,一年内相当于自身体重的 10~ 2 5倍。它饲养 5~ 6个月后就能发情交配 ,年可繁殖 4胎。1 兔舍的建造 饲养獭兔以笼养为主。兔笼一般长 10 0cm、宽 60cm、高 4 5cm ,用竹、木做为宜。笼底材料要求光滑、柔软 ,以防脚皮炎发生。室内温度要求保持在 15~ 2 5℃之间 ,相对湿度 65 %~ 75 %。2 配种 母獭兔初配时间为 6~ 7月龄 ,公獭兔为 7~ 8月龄。母獭兔发情表现为神情不… 相似文献
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本试验测定了18头湖羊公羔及考力代20头公羔90日龄前睾丸生长和血浆LH水平。结果表明,湖羊睾丸的重量、直径在60和90日龄均显著大于考力代(P<0.05)。湖羊血浆LH水平从初生到90日龄均高于考力代。血浆LH水平与睾丸重量、直径均呈正相关。 相似文献
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为了比较分析不同毛色獭兔的被毛品质,试验从海狸色獭兔、青紫蓝色獭兔、黑色獭兔、铁灰色獭兔、水貂色獭兔、宝石蓝色獭兔纯繁后代中分别选取健康、日龄相近的断奶幼兔各40只(公、母各半),测定3.5月龄和6.5月龄的被毛密度、细度、粗毛率。结果表明:6.5月龄时海狸色獭兔被毛密度最大,为14 344.41根/cm2;6.5月龄时黑色獭兔被毛密度最小,为12 563.28根/cm2。6.5月龄时不同毛色獭兔被毛细度均小于3.5月龄时被毛细度;6.5月龄时宝石蓝色獭兔被毛细度最细,为16.77μm;6.5月龄时黑色獭兔被毛细度最粗,为16.89μm。6.5月龄时海狸色獭兔被毛粗毛率最低,为7.20%;6.5月龄时黑色獭兔被毛粗毛率最高,为7.53%,且与其他毛色獭兔相比差异显著(P0.05)。说明不同毛色獭兔的被毛品质不同,海狸色獭兔、青紫蓝色獭兔、宝石蓝色獭兔的被毛品质优于其他毛色獭兔。 相似文献
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《中国畜牧杂志》2021,(9)
实验旨在观察太湖猪不同日龄睾丸组织的生长发育,探讨猪睾丸曲精细管的增长及生精细胞发育规律。选取60、90、310日龄正常个体、310日龄晚熟个体(每组30头)的太湖猪睾丸组织,制样片进行组织学观察并测量分析。结果显示:随着日龄增加,太湖猪睾丸曲细精管、精原细胞、初级精母细胞以及精子细胞直径均逐渐增加;其中90日龄的睾丸曲细精管直径较60日龄极显著增加,310日龄正常个体及310日龄晚熟个体的曲精细管直径、精原细胞直径、初级精母细胞直径以及精子细胞直径较前期阶段均极显著增加,且310日龄晚熟个体的各指标均低于310日龄正常个体。结果证明90~310日龄太湖猪公猪的睾丸生长发育较快,310日龄(晚熟个体)的睾丸增长速度较正常同龄个体慢,但仍呈增加趋势。 相似文献
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对18只法比兔生后舌和食管进行组织学观察的结果表明,免出生时舌背侧粘膜上皮未角化,并含有大量丝状乳头(平均高为135.7μm)和少量菌状乳头。固有膜不发达。舌肌为纵向、横向及垂直方向排列的横纹肌。舌腹侧粘膜表面平滑。15日龄以后,舌背侧菌状乳头高为200~521μm,其顶部直径为93~221μm。1日龄时,兔食管粘膜上皮只有4~5层细胞(平均厚28.5μm)。60日龄时,已达30层左右(平均厚164.3μm)。固有膜与粘膜下层分界不清。肌层由内纵、中环、外纵3层组成。肌层随年龄增长而逐渐增厚,1日龄时平均厚度121.4μm,60日龄时平均厚度达750μm。 相似文献
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【目的】探究不同日龄伊拉兔睾丸和附睾组织在性成熟前的变化规律,为其初情期及性成熟的判定提供组织学依据。【方法】将45只伊拉兔随机分为9组,每组5只,从30日龄开始每隔15日采集1组试验兔的睾丸及其附睾,运用形态学与组织解剖学方法对其生长发育规律进行研究分析。【结果】随着日龄的增加,睾丸指数、睾丸重、睾丸长径、睾丸短径及厚径等指标逐步增加,且150日龄时各指标均显著高于其他组(P<0.05);30、45、60日龄睾丸内生精小管排列稀疏,75、90、105日龄时睾丸间质成分逐渐增多,管腔逐步形成,120、135、150日龄时间质细胞进一步增生并成群分布,90日龄起出现圆形和长形未成型精子,120日龄的睾丸生精小管、附睾管腔中出现少量成型精子,150日龄时有大量精子密集分布于睾丸管腔内,且在120、135、150日龄时生精小管面积、上皮细胞厚度、支持细胞数均显著大于其他组(P<0.05);30日龄以上各组间质细胞个数在各组间差异不显著(P>0.05),但均显著高于30日龄;120、135、150日龄时附睾头、体、尾的直径均极显著高于其他组(P<0.05),而附睾头的柱状上皮厚度和纤毛长度则从105日龄起就显著高于30、45、60、75和90日龄组(P<0.05)。【结论】伊拉兔睾丸和附睾随日龄增加同步发育,在120日龄时达到初情期,在150日龄时睾丸和附睾已发育成熟,基本达到性成熟。 相似文献
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旨在探究不同日龄犊牛睾丸中细胞周期调控基因CyclinB1和p34cdc2的表达情况。本试验选取发育正常、体重相似的5~6d荷斯坦哺乳公犊18头,随机分为3组,每组6头,饲喂相同的基础日粮,分别在30(断奶)、60和90d时从各组分别随机抽取2头,采集其睾丸备用;通过qRT-PCR技术检测不同日龄犊牛睾丸中细胞周期调控基因CyclinB1和p34cdc2 mRNA表达规律,免疫组化技术对睾丸CyclinB1和p34cdc2进行定位分析。结果表明:90d时CyclinB1和p34cdc2 mRNA表达量显著高于30与60d(P0.05),但30与60d两种基因mRNA表达量均差异不显著(P0.05);p34cdc2蛋白在不同日龄犊牛表达差异显著(P0.05);CyclinB1蛋白在60、90d的表达量显著高于30d(P0.05),但60和90d差异不显著(P0.05)。综上表明,CyclinB1和p34cdc2 mRNA和蛋白在睾丸的表达量随着犊牛日龄的增加而增加,且不同的日龄CyclinB1和p34cdc2 mRNA和蛋白表达量存在一定的差异。 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