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为评价伊维菌素注射剂的驱虫效果与对放牧绵羊线虫病及外寄生虫病的防治示范效果,选择1.5岁感染线虫和部分外寄生虫的绵羊150只,设伊维菌素注射剂0.1,0.2和0.3mg/kg体重剂量组和伊维菌素片剂对照组,进行驱虫效果评价;在冬季应用伊维菌素注射剂按0.2mg/kg体重剂量对放牧绵羊进行规模防治技术示范,检查防治效果和考核防治效益。结果:药效试验中伊维菌素注射剂0.2mg/kg对绵羊消化道线虫虫卵转阴率和减少率分别为93.3%,99.3%,对原圆科线虫幼虫转阴率和减少率分别为90.0%和96.1%;0.3mg/kg剂量对消化道线虫虫卵及原圆科线虫幼虫转阴率和减少率均为100.0%;0.1mg/kg剂量对消化道线虫虫卵转阴率和减少率分别为76.7%,88.6%,原圆科线虫幼虫转阴率和减少率分别为66.7%和86.1%。防治示范群绵羊消化道线虫虫卵转阴率为93.3%,虫卵减少率为96.8%;对原圆科线虫幼虫转阴率和减少率分别为90.0%和96.2%。同期检查未防治对照组虫卵EPG和幼虫数略有增加。技术示范群比未示范群每只成年羊平均多增重5.47kg、幼年羊成活率平均提高2.1个百分点。结果表明该防治技术对放牧绵羊主要寄生虫病高效安全,效益显著。 相似文献
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阿苯达唑对波尔山羊消化道线虫的药效试验 总被引：1，自引：1，他引：0
为了观察阿苯达唑片对波尔山羊消化道线虫的驱除效果,探讨其对波尔山羊线虫病治疗的最佳剂量,将150只波尔山羊随机分成5组,其中设阿苯达唑7.5、15、30 mg/kg作为试验组,同时设左旋咪唑7.5 mg/kg作为药物对照组和阳性对照组,给药前后检查虫卵和虫体,计算虫卵转阴率、虫卵减少率和驱虫率,最后进行统计分析。结果显示,高剂量组和中剂量组的虫卵转阴率、虫卵减少率和驱虫率均显著高于低剂量组和盐酸左旋咪唑片对照组(P0.01),而高剂量组与中剂量组的虫卵转阴率、虫卵减少率和驱虫率差异不显著。15 mg/kg的阿苯达唑片对波尔山羊线虫的驱除效果安全。 相似文献
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验证放牧条件下伊维菌素驱虫效果,从饲养管理、放牧条件相同的一群300多只羔羊中通过粪便检查、称重从中选出体重相差不大、感染消化道线虫较为严重60只,根据感染程度均匀搭配,分为三组进行试验,每组20只用伊维菌素预混剂拌料饲喂放牧山羊,试验结果是试验组、药物对照组驱虫后3 d虫卵减少率分别是96.4%和88.7%,虫卵转阴率分别为80%和25%;驱虫后10d两组羊的虫卵减少率分别为100%和97.8%,虫卵转阴率分别为100%和85%,伊维菌素对放牧山羊消化道线虫驱虫效果优于药物左旋咪唑。 相似文献
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高寒牧区牦牛育肥试验研究 总被引：6，自引：1，他引：5
试验结果表明 :天然草地不同牧草利用率下 ,牧草利用率为 3 0 %的绝对增重、相对增重和日增重比 5 0 %和 70 %的分别高 2 2kg和 8 1kg、2 3 4%和 8 5 1%、0 0 2kg和 0 0 7kg ,各处理间差异不显著 (P >0 0 5 ) ,但处理内不同放牧期间差异极显著 (P <0 0 1) ;天然草地、人工草地上不同年龄组条件下 ,天然草地上绝对增重和日增重分别高于人工草地上的 ,0 5岁犊牛组的相对增重高于对应的 1 5岁犊牛组 ,日增重各处理间差异不显著 (P >0 0 5 ) ,但处理内不同放牧期牦牛日增重差异极显著 (P <0 0 1) ;在暖棚舍饲条件下 ,高精料组 (第一组 )的绝对增重、相对增重和平均日增重分别比低精料组 (第二组 )和对照组高 5 9kg、4 94%、0 9kg和 3 1 44kg、2 6 5 9%、0 49kg ,低精料组 (第二组 )比对照组高 2 5 5 4kg、2 1 65 %和 0 4kg ,两处理之间同一放牧期牦牛的日增重差异极显著 (P <0 0 1) ,处理内不同放牧期牦牛的日增重差异显著 (P <0 0 5 )。 相似文献
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《青海畜牧兽医杂志》2016,(1)
应用爱普利注射剂,选择自然感染线虫和体外寄生虫的1.5岁放牧藏系绵羊100只,分别按0.1、0.2、0.3 mg/kg.b w剂量皮下注射给药,同时设伊维菌素注射剂药物对照组和阳性对照组,评价驱除放牧绵羊体内线虫与体外寄生虫的效果。结果显示:爱普利注射剂0.2、0.3 mg/kg剂量对放牧绵羊消化道线虫虫卵转阴率分别为95.0%和100.0%,减少率分别为98.4%和100.0%;网尾线虫幼虫转阴率和减少率均达100.0%,原圆科线虫幼虫转阴率分别为90.0%和100.0%,减少率分别为96.1%和100.0%;对主要线虫虫卵(幼虫)的平均有效率分别达98.0%和100.0%;第7d对绵羊颚虱、足颚虱的转阴率、杀虫率均达100%;对羊蜱蝇的转阴率分别为90.0%和100.0%,杀虫率分别达92.3%和100%;均达到了高效。爱普利注射剂0.1 mg/kg剂量对线虫虫卵(幼虫)的转阴率、减少率及对体外寄生虫的杀虫率均次于0.2、0.3 mg/kg剂量组。对照药物伊维菌素注射剂0.2 mg/kg剂量消化道线虫虫卵转阴率、减少率分别为95.0%和97.8%;网尾线虫幼虫转阴率和减少率均达100.0%,原圆科线虫幼虫转阴率、减少率分别为85.0%和94.3%;第7d绵羊颚虱、足颚虱的转阴率、杀虫率均达100%;羊蜱蝇转阴率、杀虫率分别为80.0%和90%。阳性对照组线虫虫卵(幼虫)与给药前无明显变化、3种体外寄生虫感染情况较给药前略有增加。绵羊皮下注射3个剂量爱普利注射剂,未出现任何异常反应。试验证明爱普利注射剂3个剂量对藏系绵羊线虫虫卵(幼虫)、3种体外寄生虫均有效,其中0.2 mg/kg剂量驱除放牧绵羊线虫高效安全经济。 相似文献
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波尔山羊寄生虫病的药物驱虫效果试验 总被引：1，自引：0，他引：1
为了探索不同药物对波尔山羊体内外寄生虫的驱虫效果,采用杀螨脒、癣净灵、灭虫丁等13种药物进行比较试验.结果表明:600×10- 6桔子皮液离体杀螨时间仅158 min,癣净灵活体动物杀螨时间最短为22 h;建议外用灭虫药物应首选癣净灵;广谱药物阿力佳杀螨时间为24 h,残效期为28 d;按驱虫净15 mg/kg体重+虫净灵10 mg/kg体重剂量,患羊进行口服驱虫,一般2次后,发现首次感染肝片吸虫后的羊只对驱虫药物敏感,效果明显,经3次驱虫后,病羊基本转阴;消化道线虫驱虫试验表明:按5 mg/kg 体重剂量口服Rintal片时,消化道线虫的虫卵减少率,虫卵转阴率,虫卵孵化第三期幼虫减少率和第三期幼虫转阴率较高,且安全,无任何毒副作用. 相似文献
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《畜牧与兽医》2021,(9)
旨在探讨放牧对苏山猪生长性能的影响,从而确定苏山猪最佳放牧体重。选取健康、平均体重为60、70和80 kg阶段的育肥期苏山猪各40头,每个体重阶段放牧组和对照组各20头,60 kg阶段放牧75 d, 70 kg阶段放牧45 d, 80 kg阶段放牧21 d,对照组不放牧。检测放牧期苏山猪平均日增重、腹泻率、肠道寄生虫感染率以及死亡率等指标。结果:60 kg阶段,放牧组平均日增重极显著低于对照组(P0.01),腹泻率、寄生虫感染率极显著高于对照组(P0.01),死亡率显著高于对照组(P0.05);80 kg阶段,放牧组平均日增重低于对照组,腹泻率和寄生虫感染率高于对照组,但差异均末达到显著水平(P0.05);70 kg阶段,放牧组的平均日增重、腹泻率、寄生虫感染率以及死亡率等指标均处于中间水平。综上所述,随着苏山猪放牧体重的增加,放牧对苏山猪平均日增重、腹泻率、肠道寄生虫感染率以及死亡率的影响逐渐变小,80 kg体重放牧更有利于苏山猪育肥。 相似文献
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农养本地山羊补饲肥育试验 总被引：1，自引：0，他引：1
本文对农养本地山羊补饲肥育效果进行了探讨。试验结果表明 ,农养本地黑山羊、麻山羊在自然放牧未补饲的情况下增重性能、屠宰率、净肉率、经济效益等方面均没有明显差异 (P >0 0 5 ) ,放牧补饲的试验组 1、2、3、4组同放牧未补饲的对照 1、2组间均有显著差异 (P <0 0 5 ) ,对补饲日粮进行不同处理的试验 1组与 2组间、试验 3组与 4组间以及试验 1、2、3、4组间在增重性能、屠宰率、净肉率、经济效益等方面均差异不显著 (P >0 0 5 )。但试验结果表明 ,农养本地山羊补饲肥育能显著地提高日增重、胴体重、净肉重和经济效益 ,本地黑山羊和麻山羊无论补饲与否不存在品种间差异 (P >0 0 5 ) ,补饲日粮不同处理也没有引起肥育效果的显著变化 (P >0 0 5 )。 相似文献
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A 5-yr study was conducted beginning in 1983 with 460 cows to evaluate the effects of three breeding seasons (30, 45, and 70 d in length) and two times of spring calving, March (early) and April (late), on cattle production under Nebraska Sandhills range conditions. Criteria evaluated included pregnancy and weaning percentages, calving date and distribution, cow weights and body condition at four intervals, calf birth and weaning weights, and cow productivity. The 30-d breeding season included a 10-d estrus synchronization and AI period; in the other breeding seasons only natural breeding was used. The same sires were used over the entire study period. Percentage of cows pregnant and percentage of calves weaned were lower (P less than .01) for cows bred for 30 d than for cows bred for 45 or 70 d. Average calving dates were similar among the breeding groups within the early and late calving herds. Pregnancy rates from AI were higher (P less than .01) for the cows calving in April (64%) than for the cows calving in March (41%). Cows calving in April lost less weight between precalving and prebreeding and were heavier (P less than .05) at prebreeding time than the cows calving in March. Calf weaning weights were not different (P greater than .10) among any of the breeding season groups or between the two calving herds when calves were weaned at a similar age. Cow productivity (calf weaning weight per breeding female) was highest (P less than .05) for the cows bred for 70 d (186 kg), intermediate for the cows bred for 45 d (172 kg), and lowest for cows bred for 30 d (162 kg).(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
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随着畜牧业的发展,胚胎移植越来越受到人们的重视,胚胎移植工作发展很快,近些年来已经陆续有了大批量的胚胎牛、羊出生,胚胎移植技术已经成为一个成熟的技术,应用于畜牧业生产实践。1材料与方法1.1试验动物 选择具有2个以上正常情期,健康无疾病,繁殖机能正常的东北半细毛羊(4-5岁)160只和50只,分别在5-6月和9-10月2个季节进行胚胎移植对比试验,观察在非繁殖季节和繁殖季节的移植结果的比较。 相似文献
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每年的春季和秋季都是鸡舍或者鸡群通风管理的过渡性季节。很多地方白天的气温可能高达27～28℃或者更高．然而到了夜晚温度经常会下降到10℃以下．这种15～20℃以上的温度波动常常使家禽管理人员感到这样的季节条件要想管理好鸡舍通风确实比较棘手。而且。这样的昼夜温差变化也会在其它季节经常出现，特别是在南方某些地区冬季也经常出现这种现象。 相似文献
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高温季节不同光照强度对冷季型草坪草坪用性状的影响 总被引：3，自引：3，他引：3
在夏季炎热高湿的南京地区,研究自然光照、轻度遮荫、中度遮荫和重度遮荫4种光照强度对高羊茅、草地早熟禾和匍茎翦股颖生长特性和生理指标的影响。结果表明,高羊茅和草地早熟禾叶片宽度随遮荫的加剧均变窄,且中度遮荫与自然光照存在显著差异,而匍茎翦股颖在7和8月,中度遮荫处理的叶片宽度明显比自然光照和轻度遮荫处理的宽。不同光照强度对3种草坪草的生长速率产生不同影响,在5-7月随遮荫的加剧,3种草坪草的生长速率均有明显增加。3种草坪草的叶绿素和蛋白质含量随光照不同发生变化,在7月,3种草坪草中度遮荫处理的叶绿素含量明显高于自然光照处理,在6和9月,3种草坪草中度遮荫处理的蛋白质含量比自然光照处理的明显降低。光照强度对3种草坪草的超氧化物歧化酶活性、过氧化物酶活性和丙二醛含量产生影响。 相似文献
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Relationships between nutritive quality and fiber components of cool season and warm season forages: a retrospective study 总被引：2，自引：0，他引：2
Feeding trials were conducted with 428 forages in three forage classes (C3 grasses, legumes, C4 grasses) fed ad libitum to sheep and with 170 forages fed to cattle over a 20-yr period. Of this total, 153 forages were fed concurrently to sheep and cattle. Where the same forages were fed, mean dry matter digestibility (DMD) and dry matter intake (DMI) were lower (P less than .01) for sheep than for cattle, with significant effects of forage class. With the main population of forages, the regression of DMI on DMD was positive and curvilinear (P less than .01) for sheep, with no effect of forage class, and positive and linear (P less than .0001) for cattle, with a significant effect of class. For all forages, correlations between DMI and neutral detergent fiber (NDF) concentration were -.57 for sheep and -.41 for cattle; regressions differed (P less than .05) with class and animal species. Correlations of DMD with NDF and acid detergent fiber (ADF) concentrations were -.45 and -.59 (P less than .01), respectively, for sheep, and -.32 and -.39 (P less than .01) for cattle; again, regressions differed significantly with class and animal species. Within forage class, regressions of DMD and DMI on fiber components generally were linear. Intake of NDF (NDFI) was related to NDF percentage for all forages by a quadratic regression, with significant differences due to animal species and forage class. Results indicate that relationships between DMD, DMI and fiber fractions differ between forage classes and animal species, that C4 grasses are consumed at levels higher than would be expected from their DMD and fiber concentrations and that ruminants increase NDFI in response to higher NDF concentrations in the forage. 相似文献
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During the last decade the number of outdoor breeding pig units increased in Northern Europe. With comparable results in reproduction and up to 70 per cent lower capital outlays in relation to the conventional indoor systems the interest of farmers in outdoor breeding grew also in Germany. There are a number of issues that are specific to outdoor systems that need to be considered during winter season. 相似文献