甘肃合作猪皮肤毛囊的组织学特性研究(英文)     

汪磊  刘燕飞 《农业科学与技术》2012,(9):1955-1957

通过冰冻切片及H.E染色法制作合作猪皮肤毛囊切片研究合作猪皮肤毛囊特性。结果表明:合作猪皮肤毛囊清晰观察到毛根、毛尖、外鞘、内鞘、毛囊群、纤维鞘、外表皮、内表皮、皮脂腺等组织结构。不同部位间毛囊孔径大小差异极显著(P<0.01)。毛囊孔径大小依次为:肩部<体测<臀部。毛囊密度为5.59-7.26个/mm2。该研究在工业中有广泛的应用。  相似文献   

Trypanosomiasis in a dog imported in the Netherlands     

L. J. Hellebrekers  R. J. Slappendel 《The Veterinary quarterly》2013,33(4):182-186

Summary

A case‐report is presented of a Trypanosoma evansi infection in a dog imported from Nepal. The clinical symptoms included fever, anorexia, and weight loss. Diagnosis was made through morphologic study of blood smears from the patient.  相似文献   

Estimates of genetic parameters associated with lactation feed intake and reproductive performance in purebred and F1 sows     

C.L. Yoder  V.M. Duttlinger  T.J. Baas 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2014,131(4):294-304

Daily feed intake during lactation was recorded in parity records from purebred Yorkshire (n = 1587), Landrace (n = 2197) and reciprocal cross F1 (n = 6932) females, and lactation feed intake (LFI) curves were predicted using a mixed model. Evaluation of the difference in feed intake between two consecutive days of lactation resulted in the following classifications: three periods for purebreds, days 1–6, days 7–10 and days 11–18, and two periods for F1 sows, days 1–5 and days 6–18. Average rate of change in intake (ARC), average daily intake (ADI) and variation from predicted LFI values (VAR) were computed for each period of lactation. Gibbs sampling was used to estimate genetic (co)variance components for LFI metrics and reproductive performance traits. Genetic variance estimates for each LFI metric were obtained with univariate animal models, and covariance estimates were estimated with bivariate models. Heritability estimates for ADI, ARC and VAR metrics computed over the duration of lactation were 0.37, 0.24, and 0.16, respectively. Heritability estimates were highly variable across periods of lactation for ARC (0.03–0.17), ADI (0.09–0.36) and VAR (0.04–0.18) metrics in purebred and F1 populations. Genetic correlations between LFI metrics and reproductive traits were relatively low, although LFI metrics later in lactation were more highly correlated with reproductive performance.  相似文献   

生物蛋白饲料在猪生产中的应用研究     

田宗祥  张玲清 《畜牧兽医杂志》2010,29(5):50-51,54

介绍生物蛋白饲料在猪生产中的应用,总结生物蛋白饲料在提高猪生产性能、节约饲粮、保护环境等方面的研究报道,展望生物蛋白饲料在猪生产中的应用前景。  相似文献   

Classical swine fever virus infection modulates serum levels of INF-α, IL-8 and TNF-α in 6-month-old pigs     

《Research in veterinary science》2014,96(3):1262-1267

Several studies have highlighted the important role of cytokines in disease development of classical swine fever virus (CSFV) infection. In the present study, we examined the kinetics of 7 porcine cytokines in serum from pigs infected with 3 different CSFV strains. Based on the clinical picture in 6-month-old Danish pigs, the strains used for inoculation were classified as being of low (Bergen), low to moderate (Eystrup) and moderate to high (Lithuania) virulence. The cytokines interferon-alpha (INF-α), interleukin-8 (IL-8) and tumor necrosis factor-alpha (TNF-α) showed increased levels after CSFV infection with more or less comparable course in the 3 groups. However, the cytokine level peaked with a 2–3 days delay in pigs infected with the low virulent strain compared to those infected with a moderately or highly virulent strain. These findings may indicate that INF-α, IL-8 and TNF-α are involved in the immune response during CSFV infection with strains of different virulence.  相似文献   

宏基因组法研究不同堆肥处理下猪粪微生物动态结构特征     

潘梦  叶健强  康润敏  肖璐  叶勇刚  于吉锋  谢晶  曹冶  李兴玉  林毅  魏甬 《中国畜牧兽医》2021,48(7):2671-2684

试验旨在应用宏基因组测序技术探究两种堆肥处理方式下猪粪中微生物的结构组成与分布特征。试验采集同一粪池中的新鲜猪粪，随机分成添加有效微生物（EM）菌的F组和未添加EM菌的K组，每组粪堆各1堆，堆成圆锥形粪堆，粪堆高1.2 m，底部直径2 m；采集堆肥第0、7、14和21天的粪便样本并提取粪便总DNA，运用宏基因组高通量测序技术，比较F组和K组的微生物多样性（组成及结构）差异，并对功能基因进行注释。结果表明，猪粪便中的细菌共测序获得1 083 607个有效开放阅读框（ORFs）；共鉴定出147个门、118个纲、258个目、593个科、2 343个属和13 193个种；在门水平上，相对丰度前十的细菌界优势菌门有：变形菌门（Proteobacteria）、拟杆菌门（Bacteroidetes）、放线菌门（Actinobacteria）、厚壁菌门（Firmicutes）、疣微菌门（Verrucomicrobia）、绿弯菌门（Chloroflexi）、柔壁菌门（Tenericutes）、浮霉菌门（Planctomycetes）、螺旋体门（Spirochaetes）和酸杆菌门（Acidobacteria）；在属水平上，两组平均丰度值排名前三十五的属分别属于变形菌门、拟杆菌门、厚壁菌门、放线菌门和疣微菌门；通过KEGG功能预测分析，新陈代谢通路是最丰富的，氨基酸代谢通路和碳水化合物代谢通路是包含功能基因数量最多的二级通路。两组的菌群结构多样性差异表明添加EM菌后会促进堆肥前期的菌群变化。  相似文献   

中兽药制剂在猪病防控中的科学应用   总被引：2，自引：0，他引：2  

万遂如 《现代畜牧兽医》2014,(1):27-33

中草药作为我国中医学中的重要组成部分，长久以来在我国中医的研究中发挥着强大的作用，其不仅在治疗人们体内的病症中发挥重要的作用，同时在治疗和防治猪病中也有着良好的效果。本文就目前兽医临床上常用的中兽药制剂，在猪病防控中的科学应用作以简要介绍。  相似文献   

Number of ovulations in culled Landrace × Yorkshire gilts in the tropics associated with age,body weight and growth rate     

Padet TUMMARUK  Sawang KESDANGSAKONWUT 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(9):1095-1100

The objective of the present study was to determine the number of ovulations in culled Landrace × Yorkshire (LY) crossbred gilts in the tropics associated with age, body weight and growth rate. The genital organs from 316 gilts were examined for gross abnormalities, and those with normal cyclic ovaries (n=155, 307 ± 4.1 days of age, 148 ± 1.6 kg body weight) were included in the analyses. Number of ovulations was defined by a count of the corpora lutea (CL) from both ovaries. On average, the number of ovulations in LY gilts was 15.9 ± 0.3 (range 4 to 27). The number of ovulations correlated with the body weight (r=0.31, P<0.001) and growth rate (r=0.20, P=0.015) of the gilts, but not with their age (P>0.05). Gilts with a body weight of 141 to 150 kg (17.0 CL, n=31) ovulated more than those with a body weight ≤130 kg (14.1 CL, P=0.014, n=23). In conclusion, both the body weight and growth rate of the gilts were significantly correlated with the number of ovulations. The maximum number of ovulations was found in gilts at a body weight of above 141 kg.  相似文献   

不同锌源和锌水平对猪IPEC-J2细胞GLP-2基因表达的影响     

计乔平  余冰  韩国全  虞洁  郑萍  何军  毛湘冰  黄志清  陈代文  郭荣富 《中国畜牧杂志》2013,(13):35-38

本试验旨在探讨不同锌源及锌水平对猪小肠上皮细胞(IPEC-J2)胰高血糖素样肽2(GLP-2)表达的影响。分别以乳酸锌、硫酸锌(锌浓度分别为50、100、150、200 mg/L)作用IPEC-J2细胞,实时荧光定量RT-PCR方法检测GLP-2 mRNA表达,以β-actin mRNA水平作为内参对照。结果表明:在6、12 h检测时间点,不同锌源和水平及其互作对GLP-2 mRNA表达影响极显著(P<0.01);在24 h时不同锌源对其表达影响极显著(P<0.01),锌添加水平对其表达影响显著(P<0.05),不同锌源与锌添加水平交互作用则不显著(P<0.05);乳酸锌、硫酸锌促进GLP-2基因mRNA表达均具有正向浓度效应。乳酸锌和硫酸锌均可上调肠道细胞GLP-2基因mRNA的表达;在同等锌浓度水平下,乳酸锌促进GLP-2基因表达的效果优于硫酸锌。  相似文献   

Effects of Nitrogen and Phosphorus Application from Swine Manure on Winter Wheat Growth and Nutrient Utilization     

《Communications in Soil Science and Plant Analysis》2012,43(15):1797-1815

Two trials were conducted to determine the effect of swine manure application on wheat growth and nutrient uptake. Manure was added to soil on a nitrogen (N) basis at 325 kg plant-available nitrogen (PAN) ha^?1 (experiment 1) and on a phosphorus (P) basis at 50 kg P ha^?1, while maintaining a rate of 325 kg PAN ha^?1 through ammonium sulfate addition (experiment 2). Manure treatments increased overall wheat growth by 29% (P < 0.005) compared to the negative control (NC) and increased plant tissue N mass 48% (P < 0.001) and P mass 61% (P < 0.002) (experiment 1). Fertilizer control tended to increase (P < 0.10) wheat growth and increased total vegetative tissue N mass by 23% (P < 0.006) and potassium mass by 20% (P < 0.002) compared to manure treatments. Manure treatments increased wheat growth by 23% (P < 0.03) compared to the NC at the first harvest (experiment 2).  相似文献