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为探寻育肥绵羊日粮中黄芪(Astargalus membranaceus)适宜的添加量,将36只3月龄体重相近广灵大尾羊公羔随机分成6组,对照组、I、II、III、IV和V处理组分别喂给基础日粮+0%,0.5%,1%,1.5%,2% 和3%黄芪。试验期70 d,考察其生长及产肉性能。结果显示:试验结束时II组活体重显著高于对照组、III组和IV组(P<0.05),极显著高于V组(P<0.01)。II组绵羊30 d和60 d日增重显著高于其他处理组和对照组(P<0.05),II组料重比极显著低于IV组和V组(P<0.01),显著低于C组和III组(P<0.05)。II组胴体重和净肉重极显著高于 IV组、V组和对照组(P<0.01),显著高于I组和III组(P<0.05);胴体分割后II组羊肋脊排和带臀腿重显著高于其他处理组和对照组(P<0.05)。育肥绵羊日粮中添加1%黄芪可显著提高日增重,提高饲料利用率,增加优质肉块的比例。 相似文献
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文章旨在研究怀山药豆对断奶仔猪生产性能的影响,试验将120头28日龄的健康、体重一致的断奶仔猪随机分成4组,每组3个重复,每个重复10头,分别为I组：饲喂基础日粮（对照组）,II组：基础日粮+1%怀山药豆,III组：基础日粮+3%怀山药豆,IV组：基础日粮+5%怀山药豆,试验期28 d。结果表明,（1）生长性能：III组、IV组相比I组全程平均日采食量、平均日增重显著提高（P＜0.05）|料肉比降低,但差异不显著（P＞0.05）|腹泻率显著降低（P＜0.05）|（2）血清生化及免疫性能：III组、IV组血清IgA和IgG水平均显著高于I组（P＜0.05）|（3）盲肠微生物数量：与试验I组相比,III、IV组肠道中大肠杆菌、沙门氏菌数量降低,乳酸杆菌、双歧杆菌数量提高,但差异不显著（P＞0.05）。结论：在断奶仔猪日粮中添加怀山药豆可提高断奶仔猪生长性能,降低肠道中大肠杆菌、沙门氏菌的数量,提升乳酸杆菌、双歧杆菌的数量,提高抗腹泻能力,还可以促进仔猪机体血清中IgA、IgG的生成,提升抵抗力,综合改善仔猪生产的成绩。
[关键词]怀山药豆|断奶仔猪|生产性能 相似文献
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本研究旨在探讨在无抗日粮中添加葡萄糖氧化酶对肉鸡生长性能、养分代谢率、肠道pH及盲肠微生物的影响。试验选取1960羽健壮、活泼的肉仔鸡,随机分为4组,每组7个重复,每个重复70羽。对照组的日粮为基础日粮;抗生素组的日粮为基础日粮和有计划添加一些物质组成的日粮(1~21日龄添加金霉素500g/t+那西肽250g/t,22~39日龄添加那西肽250g/t,40~42日龄不添加任何物质);试验1组的日粮为基础日粮+100g/t葡萄糖氧化酶;试验2组日粮为基础日粮+150g/t葡萄糖氧化酶。试验结果:⑴生长性能:1~21日龄阶段,试验1组和试验2组末重、日增重均显著高于对照组(P<0.05),耗料增重比显著低于对照组(P<0.05),与抗生素组无显著差异,其中试验2组生长性能最佳;22~42日龄阶段,抗生素组、试验1组和试验2组末重、日增重均显著高于对照组(P<0.05),耗料增重比显著低于对照组(P<0.05),试验1组生长性能最佳;1~42日龄阶段,抗生素组、试验1组和试验2组末重、日增重均显著高于对照组(P<0.05),耗料增重比显著低于对照组(P<0.05);各阶段每日平均采食量及成活率均无显著差异。⑵养分代谢率:抗生素组、试验1组和试验2组的粗蛋白消化率(P<0.05)和表观代谢能(P<0.05)均显著高于对照组。⑶肠道pH:试验2组22d空肠pH显著低于对照组(P<0.05),试验1组和试验2组43d空肠pH显著低于抗生素组,其他各组间差异不显著;⑷肠道微生物菌群数量:抗生素组、试验1组和试验2组在22d和43d盲肠大肠杆菌(P<0.05)和沙门氏菌(P<0.05)数量均显著低于对照组,抗生素组和试验1组的盲肠乳酸菌数量显著高于对照组(P<0.05)和试验2组(P<0.05)。因此,葡萄糖氧化酶能够降低肉鸡肠道pH,优化肠道菌群,提高营养物质消化利用率,改善肉鸡生长性能;葡萄糖氧化酶前期添加300U/kg,后期添加200U/kg是一种优化添加方案。 相似文献
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《畜牧与兽医》2014,(12):43-44
选用60只樱桃谷鸭,随机分为4组,每组5只,设3个重复,每个重复5只,试验日粮分别用风干未发酵苹果渣粉(试验组II),半干发酵苹果渣粉(试验组III),膜发酵苹果渣粉(试验组IV)各5%替代基础日粮中5%的麸皮,试验期为6周,对照组(I)为基础日粮组,麸皮含量为5%。结果显示,6周龄平均体重及日增重II组略低于I组(P>0.05),III和IV组都显著高于I和II组(P<0.05);饲料转化率II、III、IV组高于I组,分别提高了1.4%,7.6%和19.36%。III、IV组高于II组,分别提高了6.12%和17.72%,其中,膜发酵处理的效果(试验组IV)较好。结果表明,膜发酵苹果渣对肉鸭生长发育有显著的促进效果。 相似文献
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中草药添加剂对宁都三黄鸡生产性能的影响 总被引：1，自引：0，他引：1
根据三黄鸡营养标准设计基础日粮,并严格限制抗生素和鱼粉等动物性蛋白在饲料中的添加量;按照中兽药配方原则,选取十多种中草药组成复方药,以不同比例添加到基础日粮中用于试验动物的日常保健与疫病防治。将600羽三黄鸡分成5组,I组为基础日粮组;II组为抗生素对照组;III、IV、V组为中草药饲料添加剂组(中草药添加量分别为0.3%、0.5%、0.7%)。通过生长性能、屠宰性能测定和分析,筛选出最佳中草药添加比例。 相似文献
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《中国饲料》2020,(17)
为探明丁酸梭菌对育成期水貂抗氧化及免疫功能的影响,本试验将40只(60±5)日龄,体重相近[(1.08±0.05)kg]的健康雄性红眼白貂,随机分为4组,每组水貂数为10只。其中I组为对照组,饲喂水貂基础日粮,II、III、IV组为试验组,分别饲喂添加0.5×10~8、1×10~8、2×10~8cfu/g丁酸梭菌的水貂基础日粮,试验期35 d。结果表明:与I组相比,II、III、IV组水貂平均日增重分别提高了17.9%、22.4%、28.4%,II、III、IV组水貂粗脂肪消化率分别提高了17.2%、17.3%、15.4%,与I组相比,II组水貂血清中总超氧化物歧化酶(T-SOD)、过氧化氢酶(CAT)活性及IgA的含量显著提高,血清中丙二醛(MDA)含量显著降低。说明饲料中添加丁酸梭菌能够提高水貂生长、抗氧化及免疫功能。 相似文献
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《广东饲料》2015,(6)
试验旨在研究不同时间停喂代谢有机酸对育肥猪生长性能及全期添加代谢有机酸对育肥猪血清抗氧化能力的影响。试验选取360头体重相近的(长×大)二元健康杂交猪,随机分为I、II、III、IV组,每组3个重复,每个重复30头,各组性别比例一致。I组饲喂基础日粮,II、III分别在试验第一、二月末停喂0.4%加酸日粮并改喂基础日粮,IV组全期饲喂0.4%加酸日粮,试验期3个月。结果显示:(1)IV组育肥猪日均增重均高于I、II、III组,且较I组提高10.93%(P0.05);(2)与I组相比,IV组育肥猪血清总抗氧化能力显著提高26.65%(P0.05),血清超氧化物歧化酶和谷胱甘肽过氧化物酶含量分别提高34.84%、14.75%,统计差异均不显著(P0.05)。综上,日粮全期添加0.4%代谢有机酸能提高育肥猪抗氧化能力,且全期添加对育肥猪生长效果最好。 相似文献
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为研究出栏前30日饲粮中添加饲用桑叶粉对育肥猪生长性能和猪肉品质的影响，试验选择40头体重相近的育肥猪，随机分成4组（每组10头）。对照组饲喂猪场原配方饲粮，试验组分别饲喂基础饲粮+5%饲用桑叶粉（试验I组），基础饲粮+10%饲用桑叶粉（试验II组），基础饲粮+15%饲用桑叶粉（试验III组）。试验期34 d，测定平均日增重、料重比、屠宰率、平均背膘厚度、眼肌面积、肌肉pH、肌内脂肪含量和脂肪酸含量等。结果显示：试验III组的平均日增重相比对照组减少了22.47%（P < 0.05）|试验III组的料重比相比对照组增加了13.55%（P > 0.05）|各试验组肌苷酸含量比对照组增加了7.97%、3.59%和2.39%（P > 0.05）|试验I组、II组和III组的月桂酸含量分别较对照组增加了100%、100%和200%（P < 0.05）|试验I组的花生四烯酸含量较对照组高2.13%，但试验II组和III组较对照组低12.77%和25.53%（P > 0.05）|其他脂肪酸含量则表现为对照组低于各试验组（P > 0.05）。综上，出栏前30日饲粮中添加饲用桑叶粉可以改善育肥猪肉品质，提高猪肉风味和营养价值。
[关键词] 饲用桑|育肥猪|出栏前30日|生长性能|猪肉品质 相似文献
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试验选用体重相近([31.03±2.13)kg]的长×大健康阉公猪20头,按照体重随机分为2个处理,每个处理10个重复,每个重复1头,采用FIRE全自动生长性能测定系统对试验猪生长性能进行精确化测定,用茶籽提取物和抗生素进行饲养对比试验,试验期48d。其中抗生素组为基础日粮添加120mg/kg的吉他霉素(50%),试验组为基础日粮添加600mg/kg的茶籽提取物。结果表明:与抗生素组相比,茶籽提取物组生长猪的平均日增重提高了4.7%,平均日采食量提高了4.5%,料重比降低了4.2%;血清超氧化物歧化酶活力提高了9.9%,总抗氧化能力提高了13.1%,丙二醛含量降低了4.8%。试验提示,生长猪日粮中用600mg/kg的茶籽提取物取代抗生素,生长猪的生长性能得到改善,抗氧化能力得到增强。 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