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1.
《黑龙江畜牧兽医》2016,(16)
为了研究杜仲对乌骨杂交鸡生长性能、肉品质及屠宰性能的影响,试验采用随机分组的方法,选取8日龄乌骨杂交鸡102只,随机分为2组,每组3个重复,每个重复17只,对照组喂基础日粮,试验组在基础日粮基础上添加1%杜仲粉。结果表明:与对照组相比,在日粮中添加1%杜仲粉可提高乌骨杂交鸡的平均日增重,降低料重比;可显著降低鸡肉的蒸煮损失(P0.05)和滴水损失(P0.05),显著提高肉色的亮度(P0.05),极显著提高肉色的黄度(P0.01),降低肉色的红度,提高肉品质;屠宰性能指标均无显著差异(P0.05),但胸肌率和瘦肉率比对照组分别提高13.96%和5.74%。说明在日粮中添加杜仲不能明显提高乌骨杂交鸡的生长性能和屠宰性能,但可明显提高肉品质。 相似文献
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糖萜素对育成期贵妃鸡生长性能、肠道微生物区系和肉质的影响 总被引：3，自引：0，他引：3
采取单因素试验设计,选取80只健康的8周龄贵妃鸡,随机分为4个处理,每个处理设4个重复,每个重复5只鸡.预试期4 d,试验期为56 d,对照组饲喂基础日粮,试验1、2、3组分别在基础日粮中添加0%、0.04%、0.06%和0.08%的糖萜素.观察不同剂量的糖萜素对贵妃鸡生长、肠道微生物区系和肉质的影响.结果表明,日粮中添加糖萜素,试验1、2、3组的平均日增重分别比对照组提高18.04%(P＜0.05)、12.59%(P＞0.05)和7.41%(P＞0.05);平均料重比分别比对照组降低7.56%(P＜0.05)、7.84%(P＜0.05)和4.36%(P＜0.05).与对照组比较,试验1、2组贵妃鸡肠道中大肠杆菌和沙门氏菌的数量显著降低(P＜0.05),乳酸杆菌和双歧杆菌的数量显著提高(P＜0.05),试验3组的大肠杆菌、乳酸杆菌和双歧杆的数量与对照组没有显著差异(P＞0.05).添加糖萜素对贵妃鸡胸肌pH值、腿肌pH值及肌肉的滴水损失没有显著影响(P＞0.05);显著降低了肌肉干物质、粗脂肪含量(P＜0.05),显著提高了试验2组肌肉的粗蛋白含量(P＜0.05).表明在育成期贵妃鸡日粮中添加0.06%的糖萜素比较适宜. 相似文献
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本试验旨在研究藤茶中二氢杨梅素(dihydromyricetin,DMY)对瑶山鸡免疫器官指数、血清生化指标及胸肌品质的影响。选用健康的40日龄贵州瑶山鸡96只,随机分为4个处理组,每个处理组3个重复,每个重复8只鸡。Ⅰ组饲喂基础日粮,试验Ⅱ、Ⅲ、Ⅳ组分别饲喂添加了0.025%、0.05%和0.1% DMY 的基础日粮,试验期70 d。结果显示,日粮中添加0.05% DMY极显著提高了瑶山鸡的胸腺指数(P<0.01),各试验组对脾脏指数和法氏囊指数的影响差异均不显著(P>0.05);日粮中添加不同剂量的DMY对血清白蛋白(ALB)、总蛋白(TP)含量无显著影响(P>0.05),但添加0.05% DMY可显著降低血清中谷草转氨酶(GOT)活性(P<0.05),也显著提高了血清溶菌酶活性(P<0.05);DMY可极显著降低瑶山鸡胸肌的剪切力和滴水损失(P<0.01),但对肌肉pH、肉色、熟肉率影响差异均不显著(P>0.05)。结果表明,日粮中添加DMY可在一定程度上促进瑶山鸡的免疫器官发育,提高免疫功能及肝细胞进行物质代谢的功能,并改善瑶山鸡的胸肌品质。 相似文献
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文章旨在研究日粮中添加不同剂量的酵母培养物对育肥牛生长性能及肉品质的影响。试验选取育肥期西门塔尔杂交肉牛72头,随机分为3组,每组6个重复,每个重复4头牛。对照组饲喂基础日粮,2个试验组分别在基础日粮中添加100和200 g酵母培养物。试验为期120 d,分为1～90 d和91～120 d两个阶段。结果表明：与对照组相比,日粮中添加200 g酵母培养物显著提高了育肥牛试验期末体重、平均日增重和平均日采食量,显著降低了育肥牛试验期料重比（P＜0.05）|日粮中添加200 g酵母培养物显著提高育肥牛背最长肌大理石纹评分（P＜0.05）|日粮中添加100和200 g酵母培养物显著降低育肥牛肉色黄度值和滴水损失（P＜0.05）|添加200 g酵母培养物可显著降低育肥牛肌肉蒸煮损失（P＜0.05）。综上所述,酵母培养物在育肥牛养殖中的应用可以有效提高育肥牛生长性能,提高育肥牛肌肉大理石纹评分,改善肉色,降低肌肉滴水损失和蒸煮损失。酵母培养物在育肥牛养殖中的推荐剂量为200 g/d。
[关键词]酵母培养物|育肥牛|生长性能|屠宰性能|肉品质 相似文献
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《黑龙江畜牧兽医》2020,(18)
为了确定杜仲粉对松辽黑猪与北京黑猪杂交后代黑猪免疫功能的影响,试验选取30日龄的松辽黑猪与北京黑猪杂交后代黑猪20头,随机分为对照组和试验组,每组10头。对照组饲喂基础日粮,试验组在基础日粮中添加2%杜仲粉,饲喂30 d后,采集血液样本,分离血清,检测血清中免疫球蛋白IgA、IgE及其亚类IgG1、IgG2a、IgG2b水平和细胞因子干扰素γ(INF-γ)、白细胞介素(IL-4)、肿瘤坏死因子α(TNF-α)水平。结果表明:与对照组比较,试验组能够显著提高杂交后代黑猪血清中免疫球蛋白IgA、IgE及其亚类IgG2a水平(P0.05),能够显著提高细胞因子IFN-γ水平(P0.05),同时也能够提高免疫球蛋白亚类IgG2b水平和细胞因子IL-4、TNF-α水平,但差异不显著(P0.05)。说明在日粮中添加2%杜仲粉,能够提高杂交后代黑猪的免疫功能,增强机体免疫力。 相似文献
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日粮中添加不同比例鲜蝇蛆对兴义矮脚鸡产肉性能及肉品质的影响 总被引：1，自引：0，他引：1
为研究日粮中添加不同比例鲜蝇蛆对兴义矮脚鸡存活率、产肉性能、肉营养品质的影响,选取7日龄兴义矮脚鸡300只,随机分为5组,每组3个重复,每个重复20只,各组基础日粮中分别添加0%、5%、15%、25%和35%的鲜蝇蛆。结果表明,(1)添加鲜蝇蛆能提高兴义矮脚鸡的存活率,以添加25%的试验组存活率最高;(2)全净膛率、腹脂率、腿肌率、胸肌率各组间差异不显著(P0.05),各组产肉性能优良;(3)与对照组比较,日粮中添加25%的鲜蝇蛆,兴义矮脚鸡肉质pH提高(P0.05),胸肌的系水力、失水率、滴水损失差异显著(P0.05),腿肌的系水力、失水率、滴水损失差异不显著(P0.05);(4)添加15%以上的鲜蝇蛆能显著提高兴义矮脚鸡胸肌、腿肌中粗蛋白质含量(P0.05),且以添加25%时最高。 相似文献
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《饲料研究》2016,(21)
为探明肉羊日粮中添加紫甘蓝和胡萝卜对其肉色与肉质的影响。试验选取80只4月龄且体质量相近的杜泊羊和小尾寒羊杂交1代小公羊,随机分成4组,既Ⅰ组(基础日粮)、Ⅱ组(基础日粮+胡萝卜)、Ⅲ组(基础日粮+紫甘蓝)和Ⅳ组(基础日粮+胡萝卜+紫甘蓝)。经60 d试验,结果表明:日粮中添加胡萝卜可显著提高肉羊日增质量、屠宰率和眼肌面积(P0.05),添加紫甘蓝可显著降低羊肉剪切力(P0.05),尤其值得推荐的是,日粮中单独或同时添加胡萝卜和紫甘蓝可显著改善肉羊肉色(P0.05)。可见,在日粮中添加胡萝卜和紫甘蓝可提高肉羊增质量,改善肉色和肉质,为肉羊生产及销售提供巨大的价值。 相似文献
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稀土壳聚糖对四川山地乌骨鸡生长性能、血清生化指标及ATP酶活性的影响 总被引：1，自引：0，他引：1
采用1日龄健康的四川山地鸟骨鸡192R,随机分为4个处理,每个处理4个重复,每个重复12只鸡.在4个处理组基础日粮中分别添加O%,0.10%,0.15%和0.20%的稀土壳聚糖,进行为期56 d的饲养试验.试验结果表明:在基础日粮中添加稀土壳聚糖可显著提高四川山地鸟骨鸡的平均体重和日增重,0.100A稀土壳聚糖组效果最明显.在血清生化指标方面,稀土壳聚糖对四川山地乌骨鸡血清Ca,总胆固醇间影响差异显著(P＜0.05),可降低碱性磷酸酶含量.对ATP酶活性的影响,0.10%和0.15%组可显著提高心脏、肝脏和肾脏中Na -K -ATP酶和Ca2 -Mg2 -ATP酶的活性(P＜0.05).初步确定稀土壳聚糖在四川山地乌骨鸡日粮中的适宜添加量为0.10%. 相似文献
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将144只21日龄AA肉仔鸡按体重相近、公母各半的原则随机分为4个处理,每个处理3个重复,每个重复12只鸡。基础日粮为对照组。试验1~3组用不同量的蝇蛆分别取代基础日粮中2%、4%、6%的豆粕,同时调整其他营养成分,使其与基础日粮中营养水平相近。试验结果表明:各试验组的pH均高于对照组。第3组pH高于对照组5.02%,差异显著(P0.05);第1组、第2组与对照组相比差异不显著(P0.05),说明添加高水平蝇蛆组对鸡肉的pH有提高的趋势;各试验组嫩度与对照组相比差异不显著(P0.05),说明添加蝇蛆对鸡肉的嫩度影响不大;第1组、第2组的滴水损失与对照组之间差异不显著(P0.05),第3组比对照组降低60.7%,差异显著(P0.05)。添加蝇蛆可提高肌肉的pH,对嫩度影响不大,减少肌肉的滴水损失。 相似文献
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《中国家禽》2017,(8)
试验旨在研究添加不同浓度的竹叶黄酮对济宁百日鸡增重及部分器官指数的影响。选用1日龄济宁百日鸡200只,随机分为4个组,每组5个重复,每个重复10只;对照组饲喂基础日粮,试验组Ⅱ~Ⅳ分别在基础日粮中添加0.05%、0.25%和0.45%的竹叶黄酮,试验期4周。结果表明:与对照组比较,1周龄0.45%剂量组的肝脏指数极显著提高(P0.01)。3周龄0.45%剂量组的肝脏指数显著提高(P0.05),0.25%和0.45%剂量组的肌胃指数极显著提高(P0.01),0.05%剂量组的胸腺指数显著降低(P0.05)。4周龄0.05%剂量组肌胃指数极显著降低(P0.01),0.25%剂量组的心脏指数显著提高(P0.05),肝脏指数极显著提高(P0.01)。各试验组济宁百日鸡的周增重均有不同程度提高,4周龄0.25%剂量组显著提高(P0.05),而0.45%剂量组极显著提高(P0.01)。可见,日粮中添加一定量的竹叶黄酮能够提高济宁百日鸡早期的增重、肝脏指数、肌胃指数、心脏指数和周增重,并且不同程度降低胸腺指数。 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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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