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试验选取锡林郭勒大草原自然放牧的２周岁以下的幼龄蒙古阉牛２３头,采用易地育肥技术进行舍饲拴系期育肥,考察其育肥和经济效益,结果,经３个月短期育肥,试验牛平均日增重为１．０４０ｋｇ,每头花获纯利２０４．９元,具有较理想的增重效果和经济效益,说明,对幼龄蒙古牛实行短期肥育是可行的。 相似文献
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N. Minjigdorj O. Baldorj D. Austbø 《Acta Agriculturae Scandinavica, Section A - Animal Sciences》2013,63(2):66-72
Abstract This study was carried out to determine the influence of three ecological regions and two milking seasons on daytime milk yield, chemical composition, protein fraction distribution and amino acids (AA) profile of milk samples from Mongolian native breed mares under traditional nomadic pasture conditions. Average daily daytime milk yield was 3975 ml. The milk contained 11.0% total solids, 2.0% fat, 6.6% lactose, 2.2% protein and 0.3% ash on average. Content of true whey protein was 36.8% and of casein 52.4%, respectively. Sodium dodecyl sulphate polyacrylamide gel electrophoresis analysis demonstrated that the whey fraction contained 37.1% α-lactalbumin, 29.6% β-lactoglobulin, 16.1% immunoglobulins, 8.1% lactoferrin and 4.7% lysozyme. The content of essential AA in the protein fraction was 48.4%. Results show that composition of mare milk can be influenced by regional differences. 相似文献
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蒙古族草原文化传统的生态学内涵 总被引：1，自引：0，他引：1
蒙古民族由于长期的游牧生活,形成了独特的文化传统。从蒙古草原文化传统对于草原生态功能维护和草地畜牧业发展的贡献入手,分析了蒙古草原文化传统的特点,认为蒙古草原文化中爱护家畜、维护环境的朴素感情是人与自然和谐相处的精神体现,为当今实施可持续发展模式提供了良好的思想基础,对于遵循科学发展观,寻求草原地区的发展模式和畜牧业的产业化途径,具有重要的启示。 相似文献
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通过对马的线粒体细胞色素b（Cytb）基因序列的遗传变异分析,来探讨蒙古家马、蒙古野马和驴之间的亲缘关系和遗传多样性。对各类马和驴样本 mtDNA Cytb 基因进行PCR扩增和测序,运用现代分子生物学软件进行数据处理。结果共检测到15个单倍型,90个突变位点,单倍型多样性（Hd）为0.9356,核苷酸多样性（Pi）为0.01022,平均核苷酸差异数（K）为8.966,各群体间的遗传多样性相差不大。系统发育树和NETwork图中每一分支都至少包含2个群体的信息。4个类型蒙古家马总体上具有较高的遗传多态性,蒙古家马与蒙古野马之间的亲缘关系较近, 且出现数个分支,蒙古家马分布在各独立的进化支中,说明蒙古家马母系来源非常广泛或经过多次驯化。 相似文献
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黄羊为国家二级保护野生动物。应用黄羊外耳耳尖微小毛皮块提取14只黄羊的DNA，给出了部分试剂的配制和预处理、实验方法和操作、DNA提取物的测量等。 相似文献
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M Yukawa T Onodera K Suzuki Y Yokomizo M Suzuki K Mochizuki 《Veterinary immunology and immunopathology》1992,33(4):353-364
Chemiluminescence studies on superoxide generation by phagosomes using opsonized zymosan showed the highest fluorescence in murine splenic macrophages among four different kinds of splenic or peritoneal macrophages from mice or gerbils. Murine splenic macrophages phagocytized two to three times more latex particles than gerbil splenic macrophages, but peritoneal macrophages did not show a significant difference in phagocytic activity between mice and gerbils. Phagocytosis by macrophages was determined by a technique based on measurement of the release of hydrogen peroxide and myeloperoxidase from phagosomes using microspheres conjugated with 3-(p-hydroxyphenyl) propionic acid (HPPA-MS). HPPA is a substrate of lysosomal myeloperoxidase. The fluorescence of HPPA-HPPA-MS produced by phagocytized HPPA-MS was measured with an immunoreaction analysis system (IMRAS), and the enzyme activities of the four different kinds of peritoneal or splenic macrophages from mice and gerbils were compared. All four kinds of macrophages produced HPPA-HPPA-MS in their phagosomes during phagocytosis and murine splenic macrophages showed the highest level of enzyme activity. 相似文献
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The absence of Rhodococcus equi in Mongolian horses 总被引：1，自引：0，他引：1
Takai S Sengee S Madarame H Hatori F Yasuoka K Ochirel E Sasaki Y Kakuda T Tsubaki S Bandi N Sodnomdarjaa R 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2005,67(6):611-613
In native Mongolian horses, the incidence and distribution of Rhodococcus equi are poorly understood. One hundred and fourteen equine fecal samples and 71 soil samples were collected from the camp sites of 26 nomadic families located in three areas less than 100 km from Ulaanbaatar, Mongolia. Five fecal samples were also collected from foals of Przewalski's Horses introduced into the Hustai National Park, Mongolia. No R. equi was isolated from the Mongolian horses or the soil samples. However, three colonies of R. equi were isolated from two fecal samples collected from foals of Przewalski's Horses. These isolates were avirulent, with neither 15- to 17-kDa antigens (VapA) nor a 20-kDa antigen (VapB) genes being detected. We concluded that native Mongolian horses and their environment appear free from contamination with R. equi. 相似文献
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过度放牧不仅导致草地生产力下降,还会引起植物群落结构的改变,这可能与土壤理化性状和土壤生物组成的变化有关。探索土壤和植物的互反馈现象,对理解草原生态系统的稳定性具有重要意义。本研究选择内蒙古锡林郭勒草原相邻地块中度和过度放牧样地的2种土壤,在灭菌和不灭菌条件下,分别种植中度放牧样地优势物种大针茅（Stipa grandis）和过度放牧样地优势物种冷蒿（Artemisia frigida）2块样地共有物种冰草（Agropyron cristatum）和隐子草（Cleistogenes squarrosa）,测定了植物生物量和水分利用效率。结果表明,中度放牧样地优势物种大针茅表现出显著的负反馈作用,而过度放牧样地优势物种冷蒿,则表现出显著的正反馈作用。与不灭菌处理相比,灭菌后,4个物种地上部生物量与水分利用效率都有增加趋势,其中冰草和隐子草生物量和水分利用效率增加显著。 相似文献
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为了对蒙古绵羊Brachyury基因DNA序列进行研究,试验主要利用PCR技术对蒙古绵羊Brachyury基因序列进行扩增并克隆,首次获得了完整的Brachyury 基因序列。利用NCBI网站上的BLAST功能将测序结果同已发表绵羊Brachyury基因序列进行比对,结果显示同源性高达99%,大部分序列完全一致。将该序列与GenBank数据库中登录的牛、人、大鼠、小鼠、山羊、猴和蝾螈等10个不同物种的Brachyury分子序列进行了比对分析。结果显示,蒙古绵羊Brachyury氨基酸序列与牛Brachyury氨基酸序列同源性最高,为96.30%;最低的则是来源于蝾螈的Brachyury氨基酸序列,仅为58.45%。遗传进化分析进一步证实蒙古绵羊与牛的Brachyury亲缘关系较近,与其他物种则遗传距离较远。此外,序列分析发现蒙古绵羊Brachyury基因高度保守,仅个别碱基发生突变。研究结果表明,蒙古绵羊Brachyury基因序列与其他脊椎动物的Brachyury基因序列也具有高度的保守性。 相似文献
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In order to study Mongolian sheep Brachyury gene DNA sequence, main purpose of this article by using the method of PCR, DNA sequence of Mongolian sheep Brachyury gene cloning and the complete Brachyury gene sequences were obtained for the first time.The sequencing with NCBI BLAST function on the site, comparing the results with the published sequences of sheep Brachyury homology was as high as 99%.We compared these sequences with ten Brachyury genes of human, mouse and other animals in GenBank database.The results showed that the most sequences were identical.Mongolian sheep Brachyury shared a 96.30% amino acid homology with Bos taurus, the highest degree of homology indicated a close genetic relationship, and the Caudata had the lowest homology 58.45%.It could be further confirmed by phylogenetic analysis.Moreover, the results showed that Mongolian sheep Brachyury gene sequence of amino acids and other vertebrates Brachyury gene sequence of amino acids were highly conservative.The research results showed that Mongolian sheep Brachyury gene sequences and other vertebrates Brachyury gene sequences were highly conservative. 相似文献
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通过3年的实地调查,查阅多个标本馆标本及相关资料,研究了蒙古高原种子植物属的组成和区系特征,以期探讨其起源与演化。结果表明：该区有种子植物115科761属4 280种,与中国植物区系相比,本区种子植物区系物种相对贫乏,特有程度较低;区域植物具有典型的温带性质,其区系地理成分复杂,联系广泛,与热带成分具有一定的亲缘关系。植物区系优势现象不显著,以单型属和少型属为主。蒙古高原植物区系表现出强烈的旱生性和古老性。从植物区系发生角度分析,蒙古高原植物区系的起源可归结为古地中海成分、东亚成分、温带成分和本地起源。 相似文献
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利用免疫组织化学等方法,测定不同年龄段实验长爪沙鼠舌下腺IgA的定位分布情况。结果表明,长爪沙鼠的舌下腺由导管部和分泌部构成,分泌部主要由粘液腺构成,其间散在分布有浆液腺细胞;导管部包括闰管、分泌管和小叶间导管等。粘液腺泡内含酸性粘多糖,浆液腺泡内主要以中性粘多糖为多,IgA阳性细胞主要分布于闰管、分泌管和小叶间导管,少量分布于腺泡和腺管间结缔组织,IgA阳性产物无明显规律性年龄变化,主要分布于胞质,胞核。 相似文献