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《饲料研究》2019,(12)
试验旨在研究黏土铜对断奶仔猪生长性能、腹泻率及粪便中铜和锌含量的影响。试验选取120头24日龄断奶仔猪,随机分为2组,每组6个重复,每个重复10头仔猪。对照组饲喂基础日粮,试验组在基础日粮中添加500 g/t的黏土铜,试验期为14 d。结果表明,试验组的腹泻率显著低于对照组(P0.05),腹泻率降低了81.82%;试验组平均日增重提高了4.35%,平均日采食量和料重比分别降低了3.45%、7.03%(P0.05)。同时,添加黏土铜对猪粪中的重金属铜和锌没有显著性影响。结果表明,断奶仔猪日粮中添加黏土铜可以降低断奶仔猪的腹泻率、改善生长性能、提高料重比。 相似文献
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酵母提取物对断奶仔猪生产性能的影响 总被引：2，自引：0，他引：2
试验考察了酵母提取物对断奶仔猪生长性能的影响.试验选用21日龄断奶仔猪80头,随机分为对照组和试验组两个处理组,每组4个重复,每个重复1栏,每栏10头.对照组饲喂基础日粮,试验组在基础日粮中额外添加0.5%啤酒酵母提取物,饲喂期28 d.结果显示,日粮中额外添加酵母提取物试验组显著提高了断奶仔猪平均日增重(ADG)(P<0.05),同时平均日采食量(ADFI)有明显的提高趋势.与对照组相比,添加酵母提取物试验组ADG和ADFI分别提高11.98%和5.85%,同时仔猪腹泻率降低了40.10%,仔猪料肉比(F/G)降低5.40%.试验结果表明,饲粮中额外添加0.5%酵母提取物能够增加断奶仔猪采食量,提高生长性能. 相似文献
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《黑龙江畜牧兽医》2015,(15)
为了观察复方中药生脉散对断奶仔猪生长性能的影响,试验选取21日龄健康断奶仔猪72头,随机分为3组,每组设3个重复,每个重复8头仔猪。对照组饲喂基础日粮,试验Ⅰ组在饲喂基础日粮的基础上添加0.5%阿莫西林,试验Ⅱ组在饲喂基础日粮的基础上添加0.5%生脉散。结果表明:2个试验组的平均日增重和平均日采食量均显著高于对照组(P0.05),试验Ⅱ组显著高于试验Ⅰ组(P0.05);2个试验组的料肉比和腹泻率均显著低于对照组(P0.05)。与对照组相比,生脉散组的平均日增重提高了30.88%,料肉比降低了13.07%。说明生脉散能够显著提高断奶仔猪的生长性能,增强抗病力,达到了促进生长发育、降低料肉比的效果。 相似文献
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《国外畜牧学(猪与禽)》2021,41(4)
本试验以临洮县辛店镇辖区内某规模化猪场62头断奶仔猪为研究对象,随机、平均分入试验组和对照组,对照组仔猪喂给基础日粮,试验组仔猪饲喂在基础日粮中添加1%复合有机酸化剂后形成的日粮。结果发现,复合有机酸化剂能够显著提高断奶仔猪的平均日增重和平均采食量(P 0.05),降低料肉比和腹泻率(P 0.05)。本试验证明,在断奶仔猪日粮中添加1%复合有机酸化剂,可促进断奶仔猪的生长,降低腹泻发生率,值得在生产中推广应用。 相似文献
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为了探索提高日粮中粗纤维对断奶仔猪营养性腹泻和对其生长性能的影响,选择健康无病、断奶重接近 (7.83±0.54) kg的杜×长×大三元杂交仔猪6窝60头,随机分为2个处理组,每组30头.对照组饲喂未加苜蓿的基础日粮,试验组饲喂添加5%苜蓿的日粮.研究结果表明,断奶后第1周和第2周内日增重,试验组比对照组分别提高49.51%和32.81%,且差异均极显著 (P＜0.01);断奶至试验结束平均日耗料量,试验组比对照组提高15.13%,且差异显著(P＜0.05).在料重比方面,断奶后料重比,试验组比对照组降低了20.66%,腹泻频率、腹泻率试验组和对照组之间均有显著的差异 (P＜0.05). 相似文献
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马千里 《国外畜牧学(猪与禽)》2021,(2):42-43
为研究在断奶仔猪日粮中添加当归对其生长性能的影响,本研究选取某规模化猪场体况较好的“杜×长×大”三元杂交断奶仔猪30头,随机分为两组,每组15头,对照组断奶仔猪饲喂基础日粮,试验组断奶仔猪喂给的日粮是在基础日粮中添加1%当归后形成的试验日粮,饲喂14 d。结果显示,试验组断奶仔猪的末重和料重比均显著优于对照组断奶仔猪的(P<0.05),试验组断奶仔猪的平均日增重和每日平均采食量较对照组断奶仔猪的有增加,但是差异不显著(P>0.05)。试验表明,在断奶仔猪日粮中添加1%当归有助于提高其生长性能,可在生产上推广使用。 相似文献
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选用24~26日龄"长×大"二元杂交断奶仔猪96头(平均体重6.84 kg±0.16 kg),研究不同形式氧化锌对断奶仔猪生长性能和腹泻的影响。试验仔猪按完全随机区组设计分为4组,每组3个重复,每个重复8头仔猪。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2800 g/t普通氧化锌、800 g/t包膜氧化锌、500 g/t纳米氧化锌,试验期14 d。结果表明,与对照组相比,试验1、2、3组断奶仔猪平均日增重分别提高了15.26%(P<0.05)、9.88%(P<0.05)和14.69%(P<0.05),料重比降低了9.59%(P<0.05)、7.53%(P<0.05)和10.27%(P<0.05);腹泻率降低了66.67%(P<0.05)、55.55%(P<0.05)和55.55%(P<0.05)。试验1、2、3组之间断奶仔猪的平均日增重、料重比及腹泻率均无显著差异(P>0.05),说明包膜氧化锌和纳米氧化锌是一种代替高剂量普通氧化锌的可行选择。 相似文献
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选取160头23日龄断奶仔猪,随机分成A、B、C、D 4组,每组4个重复,每个重复10头,A组为对照组,饲喂基础日粮,B、C、D组为试验组,分别饲喂用蛋白营养粉以1%、2%、3%的添加量等比例替代基础日粮中鱼粉的日粮,研究蛋白营养粉替代鱼粉对仔猪生长性能和蓝耳病毒抗体效价的影响。试验期21 d。试验结果表明:试验前期(1～10 d),对照组平均日增重、料重比均优于各试验组,其中料肉比显著低于2%替代组(P<0.05);试验后期(11～21 d),1%替代组的平均日增重、平均日采食量、料重比等指标均优于对照组(P>0.05),2%替代组的平均日增重、平均日采食量、料重比较对照组差,但差异不明显(P>0.05);全期试验中,1%、2%替代组仔猪生长性能与对照组无显著差异(P>0.05),试验组腹泻率较对照组无显著差异(P>0.05),试验组的蓝耳病毒抗体阳性率和抗体效价较对照组均有所提高。 相似文献
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选用出生日龄、体重相近的健康PIC断奶仔猪120头,随机分为对照组和试验组,每组6个重复,每个重复10头仔猪.对照组饲以基础日粮,试验组在基础日粮中添加0.3%的复合酵母,以研究复合酵母对断奶仔猪生长性能的影响.试验结果表明:复合酵母可显著地提高断奶仔猪的日均采食量(p<0.05),平均日增重(p<0.05),可以降低断奶仔猪的料肉比(p>0.05),同时复合酵母也有降低仔猪腹泻的趋势. 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