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1.
《饲料工业》2017,(7):27-30
试验旨在研究母猪日粮中添加多肽菌素对妊娠母猪繁殖性能和新生仔猪生长性能的影响。试验选取胎次、体况相近,预产期前45 d的母猪23头,随机分为2组,试验组12头,对照组11头。每头母猪单栏饲喂,作为一个重复。对照组饲喂基础日粮,试验组在基础日粮中添加2 g/kg多肽菌素。试验期69 d(妊娠期45 d,哺乳期24 d)。结果表明:(1)试验组母猪窝产仔总数比对照组高2.98%,窝产活仔数比对照组高4.98%,窝产健仔数比对照组高6.95%,健仔率比对照组高3.90%,但差异均不显著(P0.05)。(2)试验组仔猪初生窝重、初生个体重、断奶窝重、断奶个体重、平均窝增重及平均个体增重均比对照组显著提高(P0.05);(3)试验组仔猪初生窝重均匀度及断奶窝重均匀度分别比对照组提高32.23%和38.78%,差异极显著(P0.01)。说明妊娠母猪日粮添加2 g/kg多肽菌素可提高妊娠母猪繁殖性能和初生仔猪生长性能,提高生猪养殖的实际效益。 相似文献
2.
本试验旨在研究妊娠后期及哺乳期母猪饲粮中添加β-羟基-β-甲基丁酸(HMB)对母猪繁殖性能及免疫机能的影响。试验选取24头分娩日期相近的3~6胎妊娠后期母猪(长×大),随机分成2组,每组12个重复。对照组饲喂基础日粮,试验组在基础日粮中添加0.2%HMB。试验期为母猪妊娠84天到仔猪21日龄断奶。结果表明:与对照组相比,试验组仔猪初生窝重和初生均重分别提高10.70%和3.95%,7日龄窝重和均重分别提高6.12%和5.58%,21日龄断奶窝重和均重提高6.70%和5.45%,仔猪初生至21日龄断奶窝增重和每头日增重提高8.08%和7.55%(P0.05)。试验组母猪血清中IgG含量显著高于对照组(P0.01)。由此可见,母猪妊娠84天到哺乳期饲粮中添加0.2%的HMB,有提高仔猪初生重和哺乳期增重的趋势,显著增强母猪免疫机能。 相似文献
3.
《养猪》2019,(3)
为研究加强型复合添加剂(诸姆安Ⅱ)对母猪繁殖性能及生殖激素的影响,选择体况良好、配种日期相近的长大二元健康经产母猪40头,随机等分为2组。对照组母猪按猪场常规方法饲喂基础饲粮,试验组母猪在基础饲粮中添加"诸姆安Ⅱ"产品,配种后至妊娠85 d每头每天2.5 g,妊娠86 d至哺乳全期每头每天5 g。跟踪测评各组母猪繁殖性能及生殖激素的变化。研究结果表明:1)与对照组相比,试验组母猪所繁殖仔猪初生个体重、初生窝重、断乳个体重分别提高6.34%、15.92%、7.48%,差异显著(P0.05)。试验组母猪产仔数、产活仔数也分别提高5.37%、8.79%,但差异不显著(P0.05)。2)与对照组相比,试验组母猪泌乳力(21日龄窝重)提高18.88%(P0.05),初乳蛋白质含量提高13.64%(P0.05),IgG含量有提高趋势(提高10.50%,P0.05);母猪断乳7 d内发情率提高6.67个百分点,发情间隔平均缩短0.87 d(P0.05)。3)生殖激素测定结果表明,与对照组相比,试验组母猪产后第14天血清催乳素、促黄体素和雌二醇含量分别提高29.42%、28.04%和14.37%(P0.05);母猪断乳后第5天血清孕酮含量降低12.98%(P0.05),促卵泡素、促黄体素和雌二醇含量分别提高30.52%、17.05%和11.23%(P0.05)。研究证明,经产母猪饲喂添加"诸姆安Ⅱ"能够改善其生殖内分泌机能,有效促进妊娠期胎儿的生长发育,哺乳期泌乳性能以及仔猪生长性能得到提升,母猪断乳后发情配种等再繁殖性能也得到相应改善。 相似文献
4.
自制中草药饲料添加剂在繁殖母猪生产中的应用效果 总被引：2，自引：0，他引：2
《养猪》2017,(4)
为了验证自制中草药饲料添加剂对母猪泌乳繁殖性能的应用效果,选择以往繁殖正常的4~6胎次、体型体况相近、生产记录基本一致的大白母猪50头,按随机区组设计,试验组和对照组各25头,每组5个重复,每个重复5头。对照组饲喂基础饲粮,试验组在基础饲粮中添加自制中草药饲料添加剂0.5%。试验从母猪妊娠85 d开始至断奶后(断奶日龄21 d)发情间隔期10 d结束。全程跟踪测评两组母猪的泌乳繁殖性能及哺乳仔猪的生长性能。结果表明,试验组母猪窝产总仔数、21 d断奶个体重与断奶成活率均优于对照组(P0.05),窝产活仔数、初生仔猪重比对照组分别提高7.25%和18.33%(P0.05),初生窝重提高27.46%(P0.01);21 d断奶窝重较对照组提高17.22%(P0.05)。试验组的总泌乳力与日均泌乳力分别提高17.22%和13.06%(P0.05),初乳中的乳蛋白和乳脂含量较对照组分别提高19.94%和26.83%(P0.05);断奶母猪14 d内发情率和总受胎率分别提高9.22和12.36个百分点(P0.05),母猪断奶后再发情配种时间试验组比对照组缩短1.54 d(P0.05);试验组哺乳仔猪的腹泻指数下降18.67%(P0.05),皮毛发育状况评分提高3.64%(P0.05)。应用试验表明,该自制中草药饲料添加剂是一种能改善母猪泌乳繁殖性能和提高哺乳仔猪生长发育的绿色环保饲料添加剂。 相似文献
5.
为研究破碎饲料对母猪繁殖性能的影响,试验选择繁殖正常的3~4胎次、体型体况相近且已确认妊娠的长大二元母猪36头,随机分为3组,每组3个重复,每个重复4头猪,分别饲喂粉状饲料、颗粒饲料和破碎饲料。结果表明:破碎饲料组母猪的窝产活仔数、初生仔猪重、初生窝重比粉状饲料组分别提高9.67%、11.12%和22.92%,差异均显著(P0.05),比颗粒饲料组分别提高0.98%、0.68%和1.7%,差异不显著(P0.05);破碎饲料组母猪的总泌乳力、日均泌乳力、初乳中的乳蛋白和乳脂含量显著高于粉状饲料组(P0.05),与颗粒饲料组差异不显著(P0.05);破碎饲料组哺乳仔猪1~7 d腹泻指数比粉状饲料组下降13.33%(P0.05),总受胎率提高3.36%(P0.05);破碎饲料组母猪的繁殖性能显著高于粉状饲料组(P0.05)和颗粒饲料组(P0.05)。总之,破碎饲料能显著提高母猪的产仔性能和泌乳性能,减少仔猪腹泻,提高母猪受胎率。 相似文献
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有机微量元素对初产母猪生产性能及血液指标的影响 总被引：1，自引：0，他引：1
为研究有机微量元素对初产母猪生产性能及血清指标的影响,挑选体重相近、健康的初产怀孕80d的母猪40头,随机分为对照和试验组,每组5个重复,每个重复4头猪。对照组母猪在基础日粮中添加无机微量元素添加剂,试验组母猪从妊娠85d开始,在对照组日粮基础上再补充添加0.15%的有机微量元素添加剂,至泌乳期结束。结果表明:(1)母猪饲料中补充有机微量元素后,可显著提高活仔率、健仔数与健仔率(P0.05);有提高活仔数和断奶重的趋势(P0.05);对产程、总产仔数、初生重无影响。(2)补充有机微量元素显著提高了母猪血清中铁含量(P0.05),也显著提高了母猪和仔猪血清中IgA含量(P0.05)。这表明母猪日粮中添加有机微量元素有利于改善母猪繁殖性能。 相似文献
7.
高婕赵晓静张义奇顾宪锐马可为 《饲料研究》2023,(9):34-37
试验旨在探讨霉菌毒素脱毒降解酶对母猪生产性能的影响。选取同一批次、遗传背景、妊娠胎次和预产期相近的妊娠母猪300头,随机分为2组,每组5个重复,每个重复30头母猪。对照组为基础日粮,试验组在基础日粮中添加0.1%霉菌毒素脱毒降解酶。试验期150 d。结果表明,与对照组相比,试验组母猪情期受胎率、配种分娩率、产仔数差异均不显著(P>0.05);试验组哺乳仔猪的出生均重、断奶窝重、断奶均重、窝增重及个体增长均显著提高(P<0.05)。研究表明,添加霉菌毒素降解酶能够改善繁殖母猪健康和泌乳水平,提高哺乳仔猪的生长性能。 相似文献
8.
《中国兽医杂志》2018,(10)
为了研究中药饲料添加剂巴戟散对繁殖母猪生产性能的影响,选择胎次相同、体况无显著差异和配种日期相近的68头妊娠母猪,随机分成对照组和试验组两组,每组34头,自产前20 d开始,对照组母猪饲喂基础日粮(555妊娠料),试验组(555妊娠料+每吨饲料添加2 kg中药饲料添加剂巴戟散),产前7 d转入产房中,均喂567哺乳母猪料。试验组与对照组保持一致的常规饲养条件和方式。结果显示,在同样的温度、湿度、光照和饲喂条件下,与对照组相比,试验组母猪产程缩短了54. 27%,差异显著(P 0. 05);窝产死胎数降低了50%,差异显著(P 0. 05);仔猪出生重比对照组略高,但差异不显著(P 0. 05),总产仔数和健仔率也分别提高8. 71%、8. 73%。表明在母猪妊娠后期饲料中添加中药饲料添加剂巴戟散,可以缩短母猪的产仔时长,减少窝产仔死胎数,提高活仔率,从而提高繁殖母猪的生产性能。 相似文献
9.
本试验旨在研究母猪饲粮添加β-羟基-β-甲基丁酸(HMB)对母猪繁殖性能及仔猪生长性能和免疫功能的影响。选取20头3～6胎次、妊娠74 d的"长×大"母猪,随机分成2组,每组10个重复,每个重复1头母猪,对照组饲喂基础饲粮,试验组在对照组基础饲粮中添加2 000 mg/kg HMB。试验从母猪妊娠第74天开始,至仔猪21日龄断奶结束。结果表明:与对照组相比,试验组仔猪初生个体重显著提高14.1%(P<0.05),仔猪7、21日龄窝重分别显著提高16.6%、11.7%(P<0.05),仔猪初生至7日龄、初生至21日龄窝增重分别显著提高28.3%和12.5%(P<0.05);与对照组相比,试验组母猪在妊娠第98天和分娩当天血清免疫球蛋白G(IgG)含量分别提高35.3%(P<0.01)、13.0%(P>0.05),免疫球蛋白M(IgM)含量分别提高34.7%(P<0.05)、12.6%(P>0.05);与对照组相比,试验组母猪初乳中IgG含量显著提高19.0%(P<0.05),分娩后第14天常乳中IgM含量显著提高21.4%(P<0.05);与对照组相比,试验组仔猪7日龄血浆IgG、IgM含量分别显著提高11.4%和40.1%(P<0.05)。上述结果提示,母猪妊娠后期及哺乳期饲粮中连续添加2 000 mg/kg HMB,可显著提高仔猪初生重和哺乳期增重,改善母猪及仔猪免疫功能。 相似文献
10.
《中国畜牧杂志》2016,(7)
试验旨在研究南方高温季节代谢有机酸对母猪采食量、血液指标及子代生长性能的影响。选取体况、胎次和分娩日期均相近的长×大二元母猪18头,按分娩后3 d内采食量相近原则将母猪分为对照组和试验组,每组9个重复,每个重复1头母猪,两组母猪带仔窝重相近,每头母猪带仔数为9.2头。对照组饲喂基础日粮,试验组饲喂基础日粮+0.4%代谢有机酸产品,试验期24 d。结果表明:与对照组相比,试验组下午采食量显著提高(P0.05);试验组血清球蛋白、肌酐和尿素氮含量显著增加(P0.05),血清甘油三酯水平显著下降(P0.05);试验组血清谷胱甘肽过氧化物酶含量极显著提高(P0.01);试验组仔猪腹泻率显著降低(P0.05),仔猪断奶窝重和成活率有所提高(P0.05)。综上,代谢有机酸能提高高温季节母猪采食量,改善母猪血液指标,降低仔猪腹泻率,提高仔猪生长性能。 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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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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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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乳酸杆菌作为益生菌广泛用于人和动物.本文综述了乳酸杆菌改善宿主健康的机制.乳酸杆菌可通过产生抗菌物质如乳酸、过氧化氢、细菌素,或者通过竞争营养或肠道黏附位点来抑制致病菌;通过诱导黏附素的分泌或阻止细胞凋亡而增强肠道的屏障功能,从而保护肠道.文章重点讨论了乳酸杆菌表面成分(表面蛋白、脂磷壁酸和肽聚糖)与肠道受体(C型凝集素受体、Toll样受体和Nod样受体),阐述了他们结合后启动免疫调节信号,调控肠道免疫功能以发挥改善健康作用的机制. 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
19.
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