我国安哥拉山羊区域化的初步研究

在分析研究我国十年来开发利用安哥拉山羊实践的基础上,提出我国安哥拉山羊区域化的原则为:(1)适地;(2)适种;(3)引种现状.初步区域化的方案为:(1)黄土高原西部荒漠区(典型发展区);(2)黄土高原农牧交错区以及亚热带山地河谷地区(次典型发展区);(3)南方农区(勉强发展区);(4)不适宜发展的地区四类六种.     

我国毛用山羊培育现状及其发展

１毛用山羊在我国的引种情况我国最早引进安哥拉山羊的是陕西省，于１９８５年从澳大利亚引进，在陕北饲养成功后，又于１９８９年大批购进，并成立了“陕西省黄土高原治理研究所安哥拉山羊试验场”。山西和内蒙古两省（区）也于１９８７年引进安哥拉山羊。３省（区）共从...     

安哥拉山羊对中卫山羊生长发育的改进效果

用对比方式分析了安哥拉山羊、中卫山羊及其杂交后代羊生长发育的效果。结果表明：中卫山羊体格偏小，体重偏轻，生产性能不高；Ｆ１具有明显的杂种优势，幼年羊活重比中卫山羊提高５０．２７％（Ｐ＜０．０１）；Ｆ２幼年羊活重比中卫山羊提高３６．９０％（Ｐ＜０．０１），外貌特征酷似安哥拉山羊；回交后代活重略大于中卫山羊，特性接近母本；Ｆ３和Ｆ４体重偏小，外貌特征不及Ｆ２理想。     

安哥拉山羊在黄土高原放牧时的采食特性

安哥拉山羊在黄土高原放牧时的采食特性靳宗立，李蒙召（山西农业大学太谷０３０８０１）艾来增，王印魁（山西省农牧厅畜牧局太原０３０００１）前言一个优良品种的引入，首要的是考虑该品种的生态特性是否适合引入地区的环境条件。安哥拉山羊主要靠放牧饲养，从草地上直...     

补饲对安哥拉山羊杂二代羊产毛性能影响的研究

在枯草期，对安哥拉山羊与中卫山羊的Ｆ２羊采取２个水平、４种补饲方式试验。结果表明，全期低水平补饲，只能勉强维持０．５～１岁羊的体重，１．５～２岁羊的体重则有所下降；前期低水平、后期高水平补饲能维持２岁羊体重，而０．５～１岁羊的体重略有增加；全期采用高水平标准补饲，可使羊体重显著提高（Ｐ＜０．０５）。全期低水平补饲，对试验羊的羊毛生长没有明显影响；在前期低水平、后期高水平的补饲方式组，１岁羊的剪毛量由１６２０．４～１７６９．２ｇ增至２３５０．５～２３６０．４ｇ，２岁羊的剪毛量由２０３３．３～２２６７．４ｇ增至２５１７．５～２５２５．９ｇ；全期补饲高水平标准的羊群，１岁羊平均剪毛量达２２１７．５～２４２５．１ｇ，２岁羊达到２８１１．７～２９１４．４ｇ，个体平均产毛量接近国外纯种安哥拉山羊水平。４种补饲方式以１组和３组较好，其中前低后高的方式更经济，更切合实际     

安哥拉山羊体重与放牧采食量的关系研究

安哥拉山羊体重与放牧采食量的关系研究雷鑫，张永平，杨蔼云（陕西省黄土高原治理研究所米脂７１８１００）前言在制定安哥拉山羊的补饲方案时，必需了解不同体重羊只的干物质采食量参数。为此，我们根据１９９２年在延安南部次生林林间草场对周岁和成年安哥拉山羊公羊四...     

血液蛋白多态性与毛用山羊早期选育方案的研究

采用水平聚丙烯酰胺凝胶电泳方法，对中卫山羊，安哥拉×中卫山羊一代杂种及含安哥拉山羊基因７５％的杂种３个群体的血红蛋白，运铁蛋白，白蛋白，后白蛋白，慢α－２球蛋白及淀粉酶的遗传多态性作了比较分析。结果表明：血红蛋白和运铁蛋白２个基因座具有丰富的多态性。 过程中的繁育方式对各代杂种群体的遗传结构有显著影响，其中Ｂ１已表现出明显的近交效应。     

安哥拉山羊与中卫山羊杂交效果的分析

依据多年的饲料生产及饲养,分析安哥拉山羊与中卫山羊杂交后代的生产性能,结果表明。,安中一代羊生长发育快,１．５岁和２岁时体重极显著高于中卫山羊（Ｐ〈０．０１）,体高、体斜长和胸围３项体尺指标也极显著大于中卫山羊（Ｐ〈０．０１）;羊毛品质向同质、无髓毛方向变化;无髓毛产量极显著高于中卫山羊（Ｐ〈０．０１）。饲喂效果显著。     

开发中国马海毛的技术路线研究

开发中国马海毛的技术路线研究龚伟宏谭光兆（宁夏畜牧工作站银川７５０００４）１引言中国是世界山羊大国，有３０余个品种和类型，唯缺世界上山羊总数３％的安哥拉山羊。中卫山羊属裘皮用羊种，兼产品质良好且光泽优异的粗毛。近年的研究表明，中卫山羊属我国目前唯一的...     

中国安哥拉山羊引种和杂交改良效果分析

中国安哥拉山羊引种和杂交改良效果分析甘肃农业大学罗玉柱安哥拉山羊（Ａｎｇｏｒａｇｏａｔ）原产于土耳其，主要繁育在安卡拉、科尼亚、艾斯基舍希尔等地区，而最好的安哥拉山羊是由靠近土耳其的安纳托利亚平原中部的安哥拉省培育的，因此得名。安哥拉山羊是世界上古老...     

双峰驼胃组织学研究

双峰驼胃分为前胃和皱胃。前胃分２室，第一室有前、后２个腺囊区，第二室只有１个腺囊区。胃壁由粘膜、粘膜下层、肌层和浆膜构成。３个腺囊区的结构类似，均由界限明显的有腺部和无腺部组成，有腺部的腺体类似牛、羊的贲门腺。第一室非腺囊区、贲门、第二室食道沟及３个腺囊区的无腺部结构类似，其粘膜上皮为复层扁平上皮，表层细胞角化。皱胃分贲门腺、胃底腺和幽门腺３个腺体区，与牛、羊相应的腺体类似     

中国南方草地现状与生产潜力

中国南方草地区为秦岭、淮河以南、青藏高原以东的广大地区 ,总面积约 2 70万 km2 ,分属淮河、长江、珠江 3大流域。南方草地多山 ,本文涉及的 12个南方省区中 ,山地与平原之比平均为 4 .85∶ 1,比全国平均比值高出 1倍。山地面积之大小与青藏高原距离的远近呈负相关。南方草地大体可以分为云贵高原区、华东区和华南区。笔者提出建立 3类系统耦合经济带 ,即西南岩溶山地系统耦合生态经济带、江淮平原丘陵系统耦合生态经济带和岭南沿海平原丘陵生态经济带。每一生态经济带内包含中心城市 ,农村生产基地和社会支持系统。据初步估算 ,这样的生态经济带蕴藏了巨大的经济潜力     

小型猪特异性麻醉颉颃剂对大鼠不同脑区Na+,K+-ATP酶活性的影响

为探讨Na+,K+-ATP酶在小型猪特异性麻醉颉颃剂催醒过程中的作用,144只Wistar大鼠随机分为对照组和试验组,对照组和试验组再分为早期催醒组、中期催醒组和晚期催醒组.用分光光度法测定不同脑区Na+,K+-ATP酶活性.结果显示,大鼠在不同时期注射小型猪特异性麻醉颉颃剂后,大鼠不同脑区的Na+,K+-ATP酶活性均被激活,且Na+,K+-ATP酶活性的这种变化趋势与大鼠行为学的变化相一致.表明小型猪特异性麻醉颉颃剂催醒作用可能与激活大脑皮层和海马等脑区的Na+,K+-ATP酶活性相关.     

Regional differences in concentrations of LHRH receptors,LH and FSH in the bovine adenohypophysis

Pituitaries from intact luteal phase (INT) and ovariectomized (OVX) cows were collected at slaughter to determine whether differences exist among regions of the bovine adenohypophysis in the concentrations of luteinizing hormone (LH), follicle stimulating hormone (FSH) and receptors for luteinizing hormone releasing hormone (LHRH). Each adenohypophysis was divided into three paired regions (anterior, AT; medial, M; posterior, PT) by first making a midsagittal cut followed by two transverse cuts of approximately equal size. Values for all variables were similar between paired regions. Mean LHRH receptor, LH and FSH concentrations were greater in OVX than INT adenohypophyseal regions. Receptor and gonadotropin concentrations differed among all three regions and were greatest in the AT, intermediate in the M and lowest in the PT regions of the adenohypophysis. There were significant correlations between LHRH receptor concentrations and concentrations of LH and FSH among the three adenohypophyseal regions for both INT and OVX cows. Therefore, to accurately characterize LHRH receptors from the bovine adenohypophysis, a midsagittal-half of the gland should be used for analysis.     

Serum haptoglobin concentration as an indicator of weight gain in pigs.

Serum haptoglobin concentration was investigated as an indicator of weight gain in commercially-reared pigs. The serum haptoglobin concentrations and weights of 40 pigs were monitored on a weekly basis, from weaning to 13 weeks of age. All data were ranked based on the week 13 weights, and divided into high, middle and low weight gain groups. By the fourth week of the study, when the pigs were seven weeks old, serum haptoglobin concentrations could be used to differentiate pigs that would have a high weight gain at the end of the study from those which would have a low weight gain.     

噻环乙胺对大鼠不同脑区NOS活性及NO产量和cGMP含量的影响

动态观察噻环乙胺对大鼠不同脑区NOS活性、NO产量、cGMP含量的影响,以探讨NO／cGMP信号转导系统对噻环乙胺全麻分子机理的调控。SD大鼠168只,随机分为对照组和高、低剂量组（腹腔注射60、30mg／kg噻环乙胺）,每个剂量组又分为麻醉组、恢复Ⅰ组和恢复Ⅱ组3个亚组。用分光光度法测定脑NOS活性和NO产量,放射免疫法测定脑cGMP含量。在两个剂量的麻醉组,不但大脑皮层、海马和丘脑的NOS活性受到明显抑制,而且显著减少上述脑区NO产量和cGMP含量（与对照组相比,P〈0．05）。在高、低剂量的恢复Ⅰ组上述3个脑区的NOS活性、NO产量、cGMP含量均有不同程度的恢复,在恢复Ⅱ组除丘脑cGMP含量明显低于对照组（P〈0．05）外,其余指标均显著恢复（与对照组相比,P〉0．05）。两个剂量组脑干、小脑的NOS活性、NO产量和cGMP含量均无明显的改变。噻环乙胺的麻醉作用可能与抑制大脑皮层、海马和丘脑等脑区NO／cGMP信号转导系统相关。     

九龙牦牛高分辨G带带型的研究

采用氨甲喋呤阻断法使细胞分裂同步化，并结合胰酶Ｇ显带技术，研究了九龙牦牛的高分辨Ｇ带核型。将牦牛显带染色体划分为１０８个区，并绘制了Ｇ带模式图。     

A review of feline serum protein electrophoresis

A review of the current literature available on feline serum proteins is presented. Early studies concentrated on comparative aspects of species variations in the electrophoretic pattern. The feline electrophoretogram was divided into five basic regions: albumin, alpha-1, alpha-2, beta and gamma. Different subdivisions of these areas were recognized depending on the support medium used. Current papers have compared the relative migration distances of each globulin peak to the migration of albumin. This "Rf" value enables reliable peak identification. To date, no data exists identifying the individual proteins responsible for the peaks in the alpha and beta regions. The only feline globulin to be studied is haptolobin; however its precise location on the electrophoretic strip was not identified.     

菊苣种质资源的重要形态性状的变异研究

为揭示不同菊苣(Cichorium intybus L.)种质形态学特征多样性和变异程度,确定优良菊苣种质的表型特点,对菊苣种质资源的14个重要形态学特征进行变异性研究。结果表明:不同菊苣种质资源的形态学特征存在广泛的变异,其中,三级生殖枝数变异幅度最大,为22.25~430.00个,变异系数高达55.64%;其次为花序数量和叶宽,两者变异系数分别为54.85%和45.44%;菊苣形态学特征间存在显著相关性,叶片窄长类型的菊苣种质,株高和生殖枝高度高,生殖枝数多,茎秆粗壮,花序数量多,种子细长且饱满,千粒重较大,结实性好,反之亦然。聚类分析表明,不同菊苣种质资源可划分为2大类,源自不同地区的菊苣材料,形态相似的材料基本聚为一类,与2个对照品种聚为一类的菊苣基本表现为侧根发达,花序数量繁多,植株较高,叶片长而宽,茎秆粗壮,花序长而宽,种子短而宽。     

Relationship between intervertebral joint morphology and mobility in the equine thoracolumbar spine

The anatomical features of 21 equine thoracolumbar spines, obtained from horses with clinically normal backs, were examined and the results compared with recent data on the mobility of the joint complexes of the horse's spine. The thoracolumbar spine can be divided into four regions based upon the morphology of the joint complexes: the first thoracic intervertebral joint (T1-2), the cranial and mid thoracic region (T2-T16), the caudal thoracic and lumbar region (T16-L6) and the lumbosacral joint. The mobility of the intervertebral joints in each of these regions can be related to their morphology, particularly the shape, size and orientation of the articular facets and the presence and frequent fusion of the lateral joints of the lumbar spine. The shape and thickness of the intervertebral discs also appear to be of importance.