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蔡良 《江西畜牧兽医杂志》2018,(1)
本试验研究果寡糖对25~60日龄断奶仔猪的饲喂效果。从25日龄杜×长×大同窝断奶健壮仔猪选取10头,随机分成两组。对照组饲喂基础日粮组,试验组在基础日粮中添加0.5%果寡糖。35d后统计增重,结果表明:添加0.5%果寡糖组的试验猪平均日增重显著高于对照组(P0.05),料肉比显著低于对照组(P0.05)。 相似文献
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壳寡糖对断奶仔猪生长性能、血清抗氧化指标及肠道微生物菌群的影响 总被引：1，自引：0，他引：1
试验旨在研究壳寡糖对断奶仔猪生长性能、血清抗氧化指标及肠道微生物菌群的影响。选取300头(6.71±0.19) kg"杜×长×大"健康的28日龄断奶仔猪,随机分为5个处理组,每个处理6个重复,每个重复10头猪。对照组(A)饲喂玉米-豆粕型基础日粮,试验组(B、C、D、E)分别在基础饲粮中添加0.25、0.5、1 g/kg和2 g/kg壳寡糖,试验期为35 d。结果表明:C组和E组提高了断奶仔猪15~35 d和0~35 d这两个阶段的平均日增重并且降低了料重比,同时C组降低了断奶仔猪腹泻率。C组和D组显著提高0~14 d阶段血清中谷胱甘肽过氧化物酶(GSH-Px)的含量(P0.05),C组同时提高了总抗氧化能力(T-AOC)(P0.05)。试验35 d C组显著提高了血清中超氧化物歧化酶(SOD)的含量,C组Papillibacter cinnamivorans数量相较于其它各处理组较高。壳寡糖可有效提高断奶仔猪日增重、饲料转化率、降低腹泻率同时可提高血清中总抗氧化能力、谷胱甘肽过氧化物酶与超氧化物歧化酶的活性,增加Papillibacter cinnamivorans数量,且最适添加量为0.5 g/kg饲料。 相似文献
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《饲料研究》2017,(8)
为探讨壳寡糖对仔猪生产性能、营养物质利用率及健康状态的影响,试验选用256头日龄相近及品种相同的21 d三元杂交(杜×长×大)断奶仔猪,随机分为4个处理组,每处理组设4个重复,每重复16头,对照组饲喂基础日粮,试验1组、试验2组和试验3组日粮中分别添加50、100和150 g/t壳寡糖。预试期7 d,试验期28 d。结果表明:壳寡糖能够改善仔猪的生产性能,与对照组相比,试验2组和试验3组生长速度分别提高7.93%和14.02%(P0.05)。料肉比下降11.02%和12.27%(P0.05)。饲料养分消化率得到显著改善,其中蛋白消化率提高1.28%~4.19%、能量消化率提高4.03%~6.43%及钙消化率提高3.39%~7.15%;对仔猪粪便的成型效果明显,可提高仔猪的健康水平。在试验中,壳寡糖在仔猪日粮中的适宜添加量为150 g/t。 相似文献
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饲料用脂肪酶对哺乳母猪的繁殖性能及仔猪生产性能的影响 总被引：1，自引：0，他引：1
试验选择健康、体况良好、经产3～8胎次母猪30头,根据膘情进行随机分组。分为试验1组、试验2组、试验3组共3个处理组,每个处理5个重复,每个重复2头。试验1组为对照组,饲喂基础日粮;试验2组饲喂基础日粮+200g/t脂肪酶;试验3组饲喂基础日粮+300g/t脂肪酶。试验周期66d,全程采用盲测,研究哺乳母猪饲料中添加脂肪酶对仔猪断奶重、仔猪14d～21d增重、母猪采食量、母猪返情间隔的影响。结果表明:①在哺乳母猪料中添加不同浓度脂肪酶均可提高仔猪断奶重,差异显著(P<0.05);②可提高仔猪出生后14d～21d阶段增重,差异极显著(P<0.01);③对整个试验阶段母猪采食量无显著影响(P>0.05),300g/t组有提高采食量趋势;④可显著缩短母猪返情间隔(P<0.05)。结论:在哺乳母猪饲料中添加300g/t脂肪酶对母猪和仔猪各指标影响显著,经济效益良好。 相似文献
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该试验选取28日龄杜×长×大三元杂交断奶仔猪60头,称量始重,差异不显著(P>0.05).随机分成3组,每组20头,分别为对照组(日粮中不添加溶菌酶)、试验Ⅰ组(每吨日粮添加溶茵酶300g)、试验Ⅱ组(每吨日粮添加溶茵酶500 g),每组两个重复,每个重复组10头,试验期为4周.试验结果表明:在断奶仔猪日粮中添加溶茵酶500g/t能够控制腹泻,提高日增重16.68%,差异显著(P<0.05);降低料重比12.00%,差异显著(P<0.05). 相似文献
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植物精油提取物对断奶仔猪生产性能及血液生化指标的影响 总被引：5，自引：1，他引：4
试验旨在研究植物精油提取物对断奶仔猪生产性能及血液生化指标的影响,并探讨其在断奶仔猪日粮中的适宜添加量。选用体重相近、健康的28日龄断奶杜×长×大三元杂交仔猪144头,采用单因子试验设计,随机分为4个处理,在玉米-豆粕型日粮中分别添加50、100和200g/t的植物精油提取物,对照组饲喂基础日粮,每个处理6个重复,每个重复6头猪,试验期30d。试验结果表明:日粮中添加适量植物精油提取物能提高断奶仔猪的平均日增重、平均日采食量、血清总蛋白(P0.05);降低料肉比、腹泻率和尿素氮(P0.05);谷胱甘肽过氧化物酶与超氧化物歧化酶的活力显著提高(P0.05)。研究表明,断奶仔猪日粮中添加适量的植物精油提取物(100g/t)可提高仔猪的生产性能和抗氧化能力。 相似文献
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为了研究复合酶制剂对断奶仔猪生长性能及其血清免疫力的影响,笔者选择21日龄健康断奶仔猪（“杜×长×大”三元杂交仔猪）240头,随机分为4个处理组,每个处理组6个重复,每个重复10头猪。试验期50 d。对照组饲喂玉米-豆粕型基础日粮,试验组Ⅰ在基础日粮中添加0.1 kg/t复合酶制剂;试验组Ⅱ在基础日粮中添加0.2 kg/t复合酶制剂;试验组Ⅲ在基础日粮中添加0.3 kg/t复合酶制剂。研究结果表明,在营养相同的条件下,饲粮中添加复合酶制剂能提高断奶仔猪的日增重、降低料肉比;能提高断奶仔猪血清的IgA、IgG、IgM的含量。与对照组相比,试验组Ⅱ猪只的生长性能和血清免疫力效果最好,在基础日粮中添加0.2 kg/t的复合酶制剂能显著（P<0.05）提高仔猪的平均日增重,显著（P<0.05）降低仔猪的料肉比;在基础日粮中添加0.2 kg/t的复合酶制剂能显著（P<0.05）增加断奶仔猪血清IgA、IgM的含量,极显著增加断奶仔猪血清IgG的含量。综上所述,本次试验中在基础日粮中添加复合酶制剂能提高断奶仔猪的生长性能和血清免疫力,建议最佳添加量为0.2 kg/t。 相似文献
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《中国饲料》2018,(24)
文章旨在研究日粮添加不同水平壳寡糖对断奶仔猪生长性能、肠道形态、肠道免疫及盲肠微生物含量的影响。试验选择25 d断奶仔猪[平均体重为(7.25±1.02)kg]1125头,随机分成5组,每组5个重复,每个重复45头。对照组饲喂玉米-燕麦-豆粕型基础日粮,试验组在基础日粮中分别添加200、400、800和1600 mg/kg壳寡糖,试验从断奶第1天开始,共进行35 d。结果 :壳寡糖组较对照组显著提高了18～35 d断奶仔猪的日增重(P 0.05);对照组和400 mg/kg壳寡糖组较其他组显著降低了断奶仔猪18～35 d饲料报酬(P 0.05);200 mg/kg壳寡糖组较其他组显著降低了1～35 d断奶仔猪粪便评分(P 0.05)。对照组和200 mg/kg壳寡糖组较其他组显著降低了干物质、有机物、氮的表观消化率(P 0.05),而800和1600 mg/kg壳寡糖组较其他组显著提高了灰分表观消化率(P 0.05)。对照组较400、800和1600 mg/kg壳寡糖组显著降低了血液淋巴细胞数量及总蛋白含量(P 0.05)。对照组和200 mg/kg壳寡糖组较其他组显著提高了空肠隐窝深度(P 0.05)以及盲肠大肠杆菌含量(P 0.05)。结论 :日粮添加壳寡糖可以提高断奶仔猪养分消化率、降低腹泻率和盲肠大肠杆菌含量。 相似文献
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文章旨在研究不同水平壳寡糖对断奶仔猪生长性能、养分消化率及免疫功能的影响,试验选取60头同批次、初始体重无显著差异的30日龄（杜×长×大）断奶公猪,随机分为4组,每组3个重复,每个重复5头。其中,T1组饲喂玉米-豆粕型基础日粮,T2、T3、T4组分别饲喂基础日粮+30、60、90 mg/kg壳寡糖,试验为期20 d。结果表明：在本试验条件下,基础日粮添加30、60、90 mg/kg壳寡糖显著提高了断奶仔猪生长性能和养分消化率。且基础日粮添加60 mg/kg壳寡糖显著提高了断奶仔猪IgA和IgG含量、猪瘟抗体效价。因此,基础日粮+60 mg/kg壳寡糖的饲养效果最明显,值得在断奶仔猪养殖中推广应用。
[关键词]壳寡糖|断奶仔猪|生长性能|养分消化率|免疫功能 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