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试验Ⅰ、Ⅱ组湘东黑山羊分别用添加 15mg/kg体重、10mg/kg体重的稀土日粮 ,试验Ⅲ组为对照组 (不添加稀土 )进行育肥试验。对试验Ⅰ、Ⅱ组的日增重、料重比与试验Ⅲ组进行F检验 ,组间差异显著 (P〈0 .0 5 )。试验Ⅰ、Ⅱ组的经济效益分别比对照Ⅲ组提高 12 .93%和 8.14 %,且试验Ⅰ组高于Ⅱ组 4.79%。结果表明 :日粮中以每千克体重添加 15mg的稀土对湘东黑山羊育肥效果为佳。 相似文献
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稀土添加剂对湘东黑山羊育肥性能的影响 总被引:3,自引:0,他引:3
试验Ⅰ、Ⅱ组湘东黑山羊分别用添加15mg/kg体重、10mg/kg体重的稀土日粮,试验Ⅲ组为对照组(不添加稀土)进行育肥试验。对试验Ⅰ、Ⅱ组的日增重、料重比与试验Ⅲ组进行F检验,组间差异显著(P<0.05)。试验Ⅰ、Ⅱ组的经济效益分别比对照Ⅲ组提高12.93%和8.14%,且试验Ⅰ组高于Ⅱ组4.79%,结果表明:日粮中以每kg体重添加15mg的稀土对湘东黑山羊育肥效果为佳。 相似文献
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研究旨在探讨桑叶粉不同添加水平对湘东黑山羊瘤胃pH、氨态氮(NH3-N)浓度、挥发性脂肪酸(VFA)含量及其组成等发酵参数的影响。采用4×4拉丁方设计试验,选取4只安装有永久性瘤胃瘘管、体重(20.0±2.5)kg的湘东黑山羊为试验动物,试验分为4组,试验Ⅰ组为对照组,饲粮中不添加桑叶粉,试验Ⅱ、Ⅲ、Ⅳ组分别添加5%、10%和15%的桑叶粉。结果表明,山羊采食不同水平饲料桑叶粉配制的饲粮后,各组瘤胃液pH无显著差异(P0.05);瘤胃内NH_3-N浓度随着饲粮桑叶水平升高而呈降低趋势,试验Ⅳ组的NH_3-N浓度显著低于其它三个试验组(P0.05);试验Ⅲ组的TVFA和乙酸产量显著高于其它三个试验组(P0.05),乙酸/丙酸比值显著高于对照组(P0.05)。由此可见,饲粮中添加桑叶粉对于山羊瘤胃发酵具有积极作用,以10%添加量最为适宜。 相似文献
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试验旨在研究日粮中添加中草药渣对湘东黑山羊生长性能、内脏器官发育、肉品质及脂肪酸的影响。选取24只体重相近的湘东黑山羊公羊,随机分为4组,每组3个重复,每个重复2只羊。对照组(Ⅰ组)为基础日粮,试验组在基础日粮中添加3%(Ⅱ组)、6%(Ⅲ组)和9%(Ⅳ组)的中草药渣。预试期10 d,正式试验期84 d。结果显示,试验组湘东黑山羊采食量显著高于对照组(P<0.05),Ⅱ组和Ⅲ组日增重显著高于对照组(P<0.05);Ⅳ组瘤胃和脾脏指数显著低于对照组(P<0.05),Ⅳ组网胃指数显著高于对照组(P<0.05);试验组肌肉a*值显著低于对照组(P<0.05),Ⅳ组b*值显著低于对照组(P<0.05)。研究表明,中草药渣可以提高湘东黑山羊生长性能,对肌肉品质无不良影响,建议中草药渣添加比例为6%。 相似文献
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《湖南畜牧兽医》2017,(5)
为研究日粮添加外源性氨基酸(蛋氨酸和赖氨酸)对湘东黑山羊肌肉氨基酸组成的影响,试验采用单因素完全随机区组试验设计,将20只出生日期相近,体况良好,平均体重为(18.2±2.5kg)的湘东黑山羊随机分为4组,每组5只,单笼饲养。分别饲喂:基础日粮(对照组)(C组),基础日粮+1.27g蛋氨酸(M组),基础日粮+1.96g赖氨酸(L组),基础日粮+1.27g蛋氨酸+1.96g赖氨酸(m L组),预试期10 d,正试期30 d。试验结果表明:日粮添加蛋氨酸和赖氨酸对湘东黑山羊臀中肌氨基酸组成比例和总氨基酸含量无显著性影响(P0.05),同时对必需氨基酸和鲜味氨基酸所占比例亦无显著性影响(P0.05)。综上,日粮添加蛋氨酸和赖氨酸对湘东黑山羊臀中肌氨基酸组成无不良影响,用蛋氨酸和赖氨酸代替部分蛋白饲料饲喂湘东黑山羊,具有降低饲养成本,提高养殖收益的潜力。 相似文献
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日粮中添加复合酶制剂对贵州黑马羊短期育肥效果的影响 《畜牧与饲料科学》2015,36(4):21-21
为了解日粮中添加复合酶制剂对贵州黑马羊短期育肥效果的影响,选取断奶期贵州黑马羊60只,随机分为4组,即对照组及试验Ⅰ-Ⅲ组,每组15只。试验Ⅰ-Ⅲ组的日粮中分别添加0.05%、0.10%和0.15%的复合酶制剂,对照组日粮中不添加酶制剂。结果表明,日粮中添加0.10%的复合酶制剂时,贵州黑马羊的增重、日增重、料重比最佳。结果提示,日粮中添加一定量的复合酶制剂,能够提高贵州黑马羊的短期育肥效果。 相似文献
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将 7日龄石歧杂肉用仔鸡 180只随机分成 6组 ,每组 30只。地面平养。对照组喂以基础日粮 ,试验Ⅰ ,Ⅱ ,Ⅲ ,Ⅳ和Ⅴ组在基础日粮中分别添加稀土 10 ,2 0 ,30 ,5 0和 80mg/kg。结果表明 ,稀土对石歧杂肉鸡具有明显的促生长作用。试验Ⅰ ,Ⅱ、Ⅲ ,Ⅳ和Ⅴ组的平均体重比对照组分别提高了 3.17% ,4 .5 7% ,13.71% ,11.16 %和 7.89% (P <0 .0 1) ,只均日增重比对照组分别提高了 3.5 2 % ,5 .0 8% ,15 .2 3% ,12 .39%和 8.73% (P <0 .0 1)。料重比分别降低了3.2 3% ,4 .4 4 % ,10 .4 8% ,8.87%和 6 .4 5 %。稀土用量为 30mg/kg时 ,经济效益最高 相似文献
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不同饲养方式对黑山羊增重效果的比较试验 总被引:1,自引:0,他引:1
选择体重基本一致的浏阳黑山羊20只,分为试验Ⅰ组(舍饲)和试验Ⅱ组(半舍饲),每组10头,另在一农户选 10只体重和试验组基本一致的浏阳黑山羊作对照组(传统放牧)。经44天试验,试验Ⅰ组、Ⅱ组比对照组日增重分别提高76.28%和154.5%,试验Ⅰ组、Ⅱ组比对照组每只羊分别多获利0.71元和3.42元。 相似文献
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《云南畜牧兽医》2020,(4)
为研究不同浓缩料(Ⅰ、Ⅱ、Ⅲ)对云上黑山羊与本地黑山羊杂交羊育肥性能的影响,选择27只公羊,随机分成3组,每组9只羊,分为2个育肥阶段(27~37 kg、38~45 kg),饲喂不同浓缩料配方日粮,育肥期120 d。结果表明:2个阶段的末重、平均增重和日增重呈现相同的变化规律,均表现为Ⅱ组Ⅰ组Ⅲ组。第1阶段,Ⅱ组、Ⅲ组的末重差异显著(P0.05),Ⅱ组显著高于Ⅲ组3.93 kg;Ⅰ组、Ⅱ组的平均增重、日增重均极显著高于Ⅲ组(P0.01)。第2阶段,Ⅱ组末重最大,为46.36 kg,且极显著高于Ⅲ组;平均增重和日增重3组间均差异不显著(P0.05),但Ⅱ组与Ⅰ组、Ⅲ组相比,平均增重和日增重分别多1.28 kg、1.51 kg和21.38 g、25.09 g。全阶段,Ⅱ组与Ⅲ组末重、平均增重、日增重差异极显著(P0.01),Ⅰ组和Ⅲ组的平均增重、日增重差异显著(P0.05)。总的结果显示,在本试验条件下,Ⅱ组日粮组成最适合云上黑山羊与本地黑山羊杂交公羊的生长发育,其平均增重、日增重、增重利润等育肥性能表现最佳。 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