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饲料桑叶粉对蛋鸡生产性能和蛋品质的影响 总被引：2，自引：0，他引：2
《中国家禽》2017,(23)
试验旨在探讨饲料桑叶粉对蛋鸡生产性能及其蛋品质的影响。试验选用京粉蛋鸡360只,随机分成对照组和饲料桑叶粉添加量分别为3%、5%、7%的3个处理组,每组3个重复,每个重复30只,试验期350 d。结果表明:相对于其他组,3%处理组蛋鸡产蛋率极显著提高(P0.01),料蛋比低于对照组,但差异不显著(P0.05)。7%处理组蛋重高于对照组(P0.05),3%处理组、5%处理组鸡蛋维生素E含量高于对照组,三个处理组蛋黄颜色以及硒含量均高于对照组。因此,在蛋鸡日粮中添加3%的饲料桑叶粉能够提高蛋鸡生产性能,并能一定程度上提高蛋品质。 相似文献
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桑叶粉对蛋鸡生产性能、蛋品质和贮藏过程中哈夫单位的影响 总被引：1，自引：0，他引：1
试验旨在研究饲粮中添加桑叶粉对蛋鸡生产性能、蛋品质和贮藏过程中哈夫单位的影响。试验选用200只240日龄健康产蛋期海兰灰蛋鸡作为试验动物,随机分成5个组,每组4个重复,每重复10只鸡。第1组为对照组,第2、3、4组和第5组分别在对照组饲粮中添加1%、2%、3%和4%的桑叶粉。试验为期35 d。结果表明:与对照组相比,饲料中添加1%~4%的桑叶粉对蛋鸡的平均日采食量、产蛋率和料蛋比无显著影响(P0.05);添加1%及以上桑叶粉能够显著降低次品蛋率(P0.05);添加桑叶粉对蛋黄颜色和哈夫单位等蛋品质指标无显著影响(P0.05),但添加3%及以上桑叶粉试验组鸡蛋在贮藏1个月后其哈夫单位显著高于对照组(P0.05)。由此可知,日粮中添加桑叶粉能够降低次品蛋率,延缓贮藏过程中鸡蛋哈夫单位的下降。 相似文献
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桑叶粉对蛋鸡生产性能和蛋品质的影响 总被引：1，自引：0，他引：1
本试验旨在研究桑叶粉对蛋鸡生产性能和蛋品质的影响。选取163只412日龄的罗曼粉蛋鸡,随机分成4组,每组12个重复,每个重复3～4只。分别饲以桑叶粉添加量为0、5%、8%和11%的试验日粮。试验期为40 d。试验结果表明:(1)桑叶粉添加组的产蛋率显著低于对照组(不添加组)(P<0.01);5%桑叶粉组的料蛋比显著高于对照组(P<0.05),8%、11%桑叶粉组的料蛋比与对照组的差异不显著(P>0.05);各组间平均日采食量差异不显著(P>0.05)。(2)桑叶粉添加组的蛋黄颜色显著深于对照组(P<0.01),且随着桑叶粉添加量的增加,蛋黄颜色加深;除蛋黄颜色外,各组间其他的鸡蛋物理指标均无显著差异(P>0.05)。(3)各组的蛋黄粗脂肪、粗蛋白质及胆固醇含量差异不显著(P>0.05);各桑叶粉添加组的蛋黄多不饱和脂肪酸(PUFA)、ω-6系脂肪酸的含量显著高于对照组(P<0.05),8%、11%桑叶粉组的蛋黄ω-3系脂肪酸含量显著低于对照组(P<0.01),而各组饱和脂肪酸(SFA)、单不饱和脂肪酸(MUFA)含量差异不显著(P>0.05)。以上结果表明,从开发饲料资源、提高蛋黄色泽和蛋黄中PUFA、ω-6... 相似文献
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为研究在蛋鸡日粮添加裂壶藻粉生产富含二十二碳六烯酸(DHA)鸡蛋的效果,在蛋鸡日粮中分别加入1％、2％、3％ DHA含量为15％的裂壶藻粉,测定蛋鸡生产性能,鸡蛋品质及鸡蛋油脂中DHA、花生四烯酸(ARA)等脂肪酸的含量.结果表明:与对照组相比,添加组鸡蛋的DHA含量随饲养时间延长而不断提高,且高添加量鸡蛋DHA含量也较高;饲养25 d时,各添加组鸡蛋油脂中DHA含量由1.5％分别提高至3.95％、4.60％、5.25％;各添加组ARA的含量略有下降,其他脂肪酸含量无显著变化;各添加组蛋黄胆固醇含量有所下降.添加量低于3％时,对蛋鸡生产性能、鸡蛋品质均无显著影响,证明裂壶藻粉可用作生产富含DHA鸡蛋的饲料添加剂. 相似文献
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西兰花茎时粉对仙居三黄蛋鸡生产性能柏蛋品质的影响 总被引：1，自引：0，他引：1
为研究西兰花茎叶粉对仙居三黄蛋鸡生产性能和蛋品质的影响,选取384只三黄蛋鸡,随机分成4个处理,即对照组和试验Ⅰ、Ⅱ、Ⅲ组,每个处理3个重复,每个重复32只鸡,分别饲喂添加0、4%、6%和8%西兰花茎叶粉的日粮.结果表明:①添加西兰花茎叶粉对仙居三黄蛋鸡生产性能无显著影响(P＞0.05);②与对照组相比,试验组鸡蛋蛋白高度、蛋黄颜色、哈氏单位、蛋壳厚度和蛋壳强度均显著升高(P＜0.05);③与对照组相比,试验Ⅱ和Ⅲ组蛋黄胆固醇含量均显著下降(P＜0.05).试验结果表明:添加西兰花茎叶粉可以改善仙居三黄蛋鸡蛋品质,降低蛋黄胆固醇水平;在仙居三黄蛋鸡日粮中添加6%西兰花茎叶粉可较好的改善蛋品质. 相似文献
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文章旨在研究日粮添加桑叶粉、益生菌对蛋鸡生产性能、蛋品质和免疫功能的影响。试验选取600只250日龄2 kg左右产蛋率相近的健康的海兰褐蛋鸡,随机分成4组,每组5个重复,每个重复30只鸡。在基础日粮中分别添加0（第1组空白对照）、2%的桑叶粉（第2组）、1%益生菌（第3组）、2%的桑叶粉+1%益生菌（第4组）,试验为期42 d,预饲7 d,正试35 d。结果表明,与对照组相比,3组试验组产蛋率升高,料蛋比降低（P＜0.05）,其中第4组（2%桑叶粉+1%益生菌）效果最好|与对照组相比,3组试验组蛋黄颜色和蛋壳强度指标显著升高（P＜0.05）,其中第4组（2 %桑叶粉+1%益生菌）效果最明显|与对照组相比,3组试验组鸡新城疫抗体效价、白细胞、淋巴细胞、粒细胞数量均有所提高,其中第4组（2%桑叶粉+1%益生菌）鸡新城疫抗体效价、白细胞和粒细胞指数均显著高于其他各组（P＜0.05）。结论：在本试验条件下,日粮添加桑叶粉、益生菌对蛋鸡的生产性能、蛋品质和免疫功能的提升有协同效应。其中,基础日粮中添加2%的桑叶粉+1%益生菌的饲养效果最明显,值得在蛋鸡养殖中推广应用。
[关键词]日粮|桑叶粉|益生菌|蛋鸡|生产性能|蛋品质|免疫功能 相似文献
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桑叶粉对蛋鸡生产性能及蛋品质的影响研究 总被引：1，自引：0，他引：1
选用240只330日龄的健康罗曼商品蛋鸡,随机分为5个组,每组3个重复,每个重复16只。5组蛋鸡饲喂5种日粮,对照组饲喂基础日粮,其他处理组在基础日粮的基础上分别添加2%、4%、6%和8%的桑叶粉形成的试验日粮,试验期5周,研究桑叶粉对蛋鸡生产性能和蛋品质的影响。试验结果表明：在蛋鸡日粮中添加桑叶粉能降低蛋鸡每日的采食... 相似文献
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选择480只40周龄海兰褐壳蛋鸡,随机分为5组,每组3个重复,每重复32只鸡。在各组饲粮中分别添加不同比例的桑叶粉,研究桑叶粉对蛋鸡的产蛋性能及蛋品质的影响。试验结果表明:在饲粮中添加适量的桑叶粉,对褐壳蛋鸡的平均蛋质量、产蛋率、料蛋比和破(软)蛋率等产蛋性能无显著影响,除蛋黄色泽外,对鸡蛋的蛋壳品质和蛋内容物品质无明显影响。桑叶粉作为一种植物蛋白饲料有一定的应用前景。 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