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紫苏籽提取物对蛋种鸡生产性能的影响 总被引：1，自引：0，他引：1
本试验研究了日粮中添加不同水平的紫苏籽提取物对蛋种鸡生产性能的影响。试验选取169日龄海兰父母代蛋种鸡1 440只,随机分成4个组,分别为对照组和试验Ⅰ组、试验Ⅱ组、试验Ⅲ组,试验期为16周,预试期1周。试验组Ⅰ组、试验Ⅱ组、试验Ⅲ组,在基础日粮的基础上分别添加紫苏籽提取物150、250、350 mg/kg。结果表明,在日粮中添加紫苏籽提取物,能提高蛋种鸡产蛋率、种蛋合格率、种蛋受精率和孵化率(P0.05),提高单枚蛋重和饲料转化率(P0.05),经济效益显著提高。综合分析,日粮添加250 mg/kg紫苏籽提取物效果较好。 相似文献
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《中国畜牧杂志》2017,(4)
本试验旨在探讨日粮中添加紫苏籽提取物对罗曼粉蛋种鸡产蛋高峰后期生产性能、激素水平、繁殖性能的影响。试验选用1 080只49周龄健康罗曼粉父母代蛋种鸡随机分为4个处理,每个处理分5个重复,每个重复54只。对照组饲喂基础日粮,试验组分别在基础日粮中添加紫苏籽提取物100、200、300 mg/kg,试验期为40 d。结果表明:与对照组相比,在日粮中添加300 mg/kg紫苏籽提取物能极显著提高蛋种鸡产蛋率和日均产蛋量(P0.01);与对照组相比,添加100、200、300 mg/kg紫苏籽提取物均能极显著提高蛋种鸡血清中孕酮(第20天)和雌二醇(第20、40天)的含量(P0.01),添加300 mg/kg紫苏籽提取物能极显著降低蛋鸡血清中睾酮含量(P0.01);与对照组相比,添加300 mg/kg紫苏籽提取物能显著提高蛋种鸡种蛋合格率、种蛋受精率和孵化率,降低死淘率(P0.05)。由此可知,在蛋种鸡产蛋高峰后期日粮中添加300 mg/kg紫苏籽提取物效果较好,能够提高蛋种鸡生产性能和繁殖性能。 相似文献
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《山东畜牧兽医》2017,(10)
为了研究紫苏籽提取物对蛋种鸡产蛋高峰后期生产性能及新城疫抗体水平的影响,为紫苏籽提取物在养禽业中的应用提供理论依据。试验选择1080只49周龄健康罗曼粉父母代蛋种鸡随机分为4个处理,每个处理分5个重复,每个重复54只。对照组饲喂基础日粮,试验I、II、III组分别在基础日粮中添加紫苏籽提取物0.01%、0.02%、0.03%,试验期为40d。分别在试验第20和40d检测血清中鸡新城疫(ND)抗体效价。结果表明:(1)与对照组相比,在日粮中添加紫苏籽提取物对蛋种鸡产蛋高峰后期的生产性能有促进作用,降低死淘率(P0.05),提高产蛋率和日均产蛋量(P0.01);(2)各试验组的新城疫抗体效价均比同期对照组高。第20d时,试验Ⅱ组新城疫HI抗体水平显著高于对照组(P0.05),第40d时,试验III组新城疫HI抗体水平显著高于对照组(P0.01)和试验II组(P0.05)。由此可知,在蛋种鸡产蛋高峰后期日粮中添加紫苏籽提取物能够提高蛋种鸡生产性能和新城疫HI抗体水平,且以紫苏籽提取物添加量为0.03%时效果最佳。 相似文献
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试验旨在研究饲料中添加植物提取物对"农大3号"小型蛋鸡父母代种鸡产蛋性能和所产种蛋品质的影响。试验选取1200只体况、日龄、生产性能接近的60周龄"农大3号"小型蛋鸡父母代种鸡,随机分为2个组(对照组和试验组),每组6个重复,每个重复100只鸡。对照组饲喂基础饲粮,试验组饲料在基础日粮中添加5 kg/t复合植物提取物。试验期共4周。结果显示:相对于对照组,日粮中添加复合植物提取物能显著提高种鸡产蛋率(P<0.05);显著降低破蛋率(P<0.05);有降低裂纹蛋率的趋势,但差异不显著(P>0.05);能显著提高种蛋的哈氏单位(P<0.05)。综上所述,"农大3号"小型蛋鸡父母代种鸡日粮中添加0.5%的复合植物提取物能提高种鸡的产蛋率,提高种蛋的蛋壳质量和哈氏单位。 相似文献
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紫苏籽提取物对蛋鸡产蛋高峰后期生产性能、生殖激素及免疫功能的影响 总被引：2，自引：0，他引：2
为了探讨在饲粮中添加不同水平紫苏籽提取物对蛋鸡产蛋高峰后期生产性能、生殖激素及免疫功能的影响,本试验选用体重、产蛋率基本一致的48周龄海兰褐蛋鸡480只,采用单因素完全随机试验设计,随机分为4组,每组6个重复,每个重复20只。对照组饲喂基础饲粮,试验Ⅰ、Ⅱ、Ⅲ组分别在基础饲粮中添加0.01%、0.02%、0.03%的紫苏籽提取物,试验期30 d。结果表明:1)与对照组相比,饲粮中添加0.01%、0.02%、0.03%紫苏籽提取物均能降低料蛋比,但差异不显著(P0.05),4组间日均采食量、破软蛋率无显著差异(P0.05),添加0.03%紫苏籽提取物能极显著提高蛋鸡产蛋率和日均产蛋量(P0.01);2)与对照组相比,添加0.01%、0.02%、0.03%紫苏籽提取物能极显著提高蛋鸡血清中孕酮(第15天)和雌二醇(第15和30天)的含量(P0.01),添加0.03%紫苏籽提取物能极显著降低蛋鸡血清中睾酮含量(P0.01);3)与对照组相比,添加0.01%、0.02%、0.03%紫苏籽提取物能极显著提高蛋鸡血清中白细胞介素-2(IL-2)含量(P0.01),添加0.02%、0.03%紫苏籽提取物能极显著提高蛋鸡血清中免疫球蛋白G(Ig G)含量(P0.01),添加0.03%紫苏籽提取物能极显著提高蛋鸡血清中免疫球蛋白A(Ig A)含量(P0.01)。由此可知,饲粮中紫苏籽提取物添加水平为0.03%时,能极显著提高蛋鸡产蛋高峰后期产蛋率、日均产蛋量和免疫功能。 相似文献
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本试验旨在研究葡萄籽提取物对种鸡产蛋高峰后期生产性能和生殖激素水平的影响。选取产蛋率、体重相近,健康状态良好的48周龄罗曼粉父母代种鸡1080只,随机分为4组,每组5个重复,每个重复54只鸡。对照组饲喂基础日粮,试验Ⅰ、Ⅱ、Ⅲ组在基础日粮中分别添加葡萄籽提取物0.01%、0.02%、0.04%。预试期7d,正试期40d。结果表明:(1)与对照组相比,在日粮中添加葡萄籽提取物能够明显抑制种鸡产蛋高峰后期产蛋率降低,提高产蛋率和日均产蛋量(P<0.05),降低了料蛋比(P<0.01);(2)与对照组相比,试验II组种蛋合格率显著高于对照组(P<0.05);试验Ⅰ、Ⅱ、Ⅲ组种蛋受精率、孵化率均极显著高于对照组(P<0.01);(3)与对照组相比,试验Ⅰ、Ⅱ、Ⅲ组均提高种鸡血清中孕酮(第20天)和雌二醇(第20、40天)的含量(P<0.01),试验II组极显著降低蛋鸡血清中睾酮含量(P<0.01)。综上,在种鸡产蛋高峰后期饲粮中添加葡萄籽提取物可提高生产性能和繁殖性能,且以葡萄籽提取物添加量为0.02%时效果较好。 相似文献
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将720只1日龄艾维茵肉仔鸡随机分为4组,每组6个重复,每重复30只鸡.对照组饲喂基础日粮,试验Ⅰ、Ⅱ和Ⅲ组分别在基础日粮中添加0.004%、0.008%和0.012%苣荬菜复合提取物,进行饲养试验,研究苣荬菜复合提取物对肉仔鸡生产性能的影响.结果表明:饲料中添加苣荬菜复合提取物,可提高肉仔鸡成活率、增质量和饲料转化率.其中,添加0.012%的苣荬菜复合提取物组增质量最高,比对照组提高25.12%(P＜0.05),料重比最低(1.86),比对照组降低10.91%,胸肌率最高(25.2%),比对照组提高11.85%(P＜0.05).可见,苣荬菜复合提取物是一种极具推广应用价值的新型绿色饲料添加剂. 相似文献
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紫苏籽提取物对肉鸡生长性能和鸡肉品质的影响 总被引：1，自引：0，他引：1
试验采用单因子试验设计,选择1日龄艾维茵肉鸡270只(公母各半),随机分成3组,每组3个重复,每个重复30只鸡,分别饲喂基础日粮(对照组),在基础日粮上添加50 mg/kg金霉素(试验Ⅱ组)和在基础日粮上添加150 mg/kg紫苏籽提取物(试验Ⅲ组),研究紫苏籽提取物对肉鸡生产性能和鸡肉品质的影响。结果表明:①紫苏籽提取物可以提高肉鸡的生产性能,试验Ⅲ组与对照组相比,日增重显著提高,料肉比显著降低。试验Ⅱ组和试验Ⅲ组差异不显著,效果相当。②紫苏籽提取物对肉鸡的肉品质有一定的调节作用。与对照组相比,试验Ⅲ组肉鸡腿肌嫩度和胸肌嫩度分别提高6.20%和15.08%;腿肌、胸肌滴水损失分别降低了1.00%和18.60%;腿肌、胸肌水分含量分别提高了0.37%和1.74%;腿肌粗蛋白含量提高了4.04%(P<0.05),胸肌粗蛋白含量也略有提高;腿肌粗脂肪含量降低了22.04%(P<0.05),胸肌粗脂肪含量降低了39.19%(P<0.01);腿肌、胸肌总还原性糖、肌苷酸、谷氨酸含量均显著提高。试验结果表明,紫苏籽提取物能促进肉鸡生长,改善鸡肉品质,作用优于抗生素。 相似文献
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为研究复合乳酸杆菌制剂对蛋种鸡产蛋性能、免疫机能和盲肠微生物区系的影响,试验选用170日龄蛋种鸡288只,随机分为4组,每组6个重复,每个重复12只鸡。对照组饲喂基础饲粮,试验组饲喂在基础饲粮中分别添加0.05%、0.10%和0.20%复合乳酸杆菌制剂的试验饲粮。试验期30 d。结果表明:1)各组蛋种鸡平均日采食量、平均蛋重和料蛋比均差异不显著(P>0.05);饲粮添加复合乳酸杆菌制剂可显著影响蛋种鸡的产蛋率(P<0.05),其中0.05%乳酸杆菌添加组显著高于对照组(P<0.05)。2)饲粮添加复合乳酸杆菌制剂显著提高了蛋种鸡对粗蛋白质的表观消化率(P<0.05),但对钙和磷的表观消化率无显著影响(P>0.05)。3)饲粮添加0.05%复合乳酸杆菌制剂显著提高了蛋种鸡的禽流感抗体效价(P<0.05),添加0.05%、0.10%和0.20%复合乳酸杆菌制剂均显著降低了盲肠大肠杆菌和产气荚膜梭菌的数量(P<0.05),显著提高了盲肠双歧杆菌和乳酸菌数量(P<0.05)。综上所述,饲粮中添加复合乳酸杆菌制剂对蛋种鸡的产蛋性能、营养物质消化率、免疫机能都有一定提高作用,并改善了肠道微生物区系,其适宜添加水平为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