反刍动物尿素糖蜜舔砖的加工工艺及应用的研究进展

舔砖是将反刍动物所需的营养物质经科学配方和加工工艺加工成块状,供反刍动物舔食的一种饲料.在反刍动物养殖中,尿素糖蜜舔砖既可以解决蛋白质来源不足的问题,又可以节约饲料,提高家畜的生产力,利用效价高.本文就尿素糖蜜舔砖在国内外对尿素糖蜜舔砖的研制和应用进行综述,旨在寻找更为有效的解决草食动物营养缺乏的方法,为尿素糖蜜舔砖在...     

藏系绵羊MSTN基因在不同年龄不同组织的表达定量研究

Dermatophyte infection or ringworm is a superficial cutaneous infection with one or more of the fungal species of the keratinophilic genera Microsporum, Trichophyton, or Epidermophyton and is a zoonosis with a great impact on public health. Dermatophytes were identified from rabbit sample cultures submitted to mycological examination in the Laboratory of Microbiology of the University of Tr~-os-Montes e Alto Douro, Vila Real, Portugal. All samples were collected from suspected clinical cases. Dermatophytes were cultured from 4 of the 55 specimens （7.3%）. The dermatophytes isolated were Trichophyton mentagrophytes var. mentagrophytes （1.8%） and Microsporum gypseum （5.5%）. Microscopic examination was negative in all specimens. In this work, Scopulariopsis spp., a contaminant mould, was identified in 13 specimens （23.6%）. The proportion of positive samples in relation to the number of samples examined from cases suspected was very low. As all samples were collected from rabbits with compatible signs, we presume that the low prevalence of isolation was due to laboratory constraints on dermatophytes diagnosis.     

藏系绵羊MSTN基因在不同年龄不同组织的表达定量研究

[目的]研究MSTN基因在藏系绵羊不同年龄、不同组织的表达差异。[方法]根据GenBank已发表序列（NM_001009428．1）设计l对引物,以藏系绵羊组织总RNA为模板,采用实时荧光定量PCR技术（QRT—PCR）分析了MSTN基因在不同年龄阶段的真胃、瘤胃、腿肌和心肌中的基因表达量。[结果]经过内参基因校正后,综合4个组织分析,MSTN基因在6月龄藏系绵羊的相对表达量最高,是12月龄藏系绵羊的2．52倍,是羔羊的2．24倍,是9月龄的1．30倍（尸〈O．05）。且MSTN基因在腿肌中的表达量最高,在其他组织几乎未表达,在腿肌中的表达量是其瘤胃的3984．78倍,是心肌的602．69倍（P〈0．01）。[结论]为MSTN蛋白抗体的正确利用奠定了基础。     

中草药饲料添加剂酌研究进展

近年来,中草药饲料添加剂以其安全、天然、药源广、无不良反应、不会产生抗药性等一系列优势日益成为饲料业中开发和研究的热点,它是一种具有防病治病和营养保健双重功能的“绿色环保型”添加剂。本文对中草药饲料添加剂的主要特点、作用、分类以及发展趋势进行综述,旨在为饲料工业和养殖方面提供参考和依据。