共查询到20条相似文献，搜索用时 62 毫秒
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郏县红牛发展中存在的主要问题及对策郑二欣耿二强张杰张俊英朱永红杨长松张利康（河南省平顶山市畜牧局４６７０００）（河南省鲁山县红牛场４６７３００１郏县红牛的发展成就１．１郏县红牛的特点郏县红牛是我国著名的役肉兼用型地方优良黄牛品种。具有被毛红色,体形匀... 相似文献
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谷石榜 《河南畜牧兽医(综合版)》2001,22(3):44-44
在市场经济条件下，养猪业也有其一定的经济规律，生猪价格也一样，也具有波动性，自１９８５年生猪收购价格放开以来，生猪价格波动周期一般是３年左右，但大的波动约６年一个周期，分别是１９８７年、１９９３年、１９９９年。每年又出现一次小波动周期，以上半年猪肉价下跌，至七月底开始回升为特征。在品种价格上扬时，由于生猪生产发展过快，造成不纯的杂交种当种猪用，品种退化，品种与品种之间的价格波动。由于地域间发展速度与发展水平不同，出现了地域间价格的波动。１影响波动周期的主要因素１．１小生产与大市场的矛盾当前家庭养… 相似文献
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槐山羊主要产于河南省周口市。沈丘槐店镇是槐山羊的发源地。品种形成一千多年来，广泛分布于河南、安徽两省２９个地、市的黄淮平原农区。“品种数量属（中国）最大山羊品种群之一”。槐山羊属皮、肉、毛兼用羊，它板皮优，肉质好，繁殖率高，适应性强；享誉国内外。槐山羊是河南沈丘县宝贵的品种资源，有很高的品种保护和开发利用价值。１槐山羊的特征和生产性能１．１外貌特征槐山羊体格中等，公羊雄威，母羊俊秀。公母羊均有髯，额宽鼻直，面部微凹，眼大有神。背腰平直，尾短上翘，皮肤紧凑，结构匀称；体型近圆桶形；四肢端正，蹄质坚… 相似文献
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海生 《河南畜牧兽医(综合版)》2001,(10)
高产优质饲草——鲁梅克斯Ｋ－１于１９７２年由前苏联乌克兰国家科学院作物研究所培育而成。经过河南省通许县草业科学研究所几年间的引进试验示范、观察，证明该品种突出表现丰产、优质、抗寒、抗病、耐旱、耐涝、抗盐碱等优点。该品种１９９７年已通过全国牧草审定委员会审定。鲁梅克斯Ｋ－１饲草属蓼科多年生植物，由天山酸模和巴山酸模两系杂交而成。畜牧专家认为值得大面积推广，有利于防风固沙，保持水土，改变生态环境；畜牧养殖，节省成本，增强生态绿化和提高畜牧养殖业的经济效益。该品种味道略酸微甜，无异味，无刚毛，叶片宽大… 相似文献
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2007年11月9日，中国第一个肉牛品种——夏南牛肉牛品种新闻发布暨推广会议在河南省驻马店市隆重召开。会议由河南省畜牧局、驻马店市人民政府主办，泌阳县人民政府、驻马店市畜牧局承办。 相似文献
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信阳水牛属河南省地方良种,1983年被列入《河南省地方优良畜禽品种志》。该品种具有体型大,体质结实,结构匀称,力大持久,性情温训,适应性好,抗病力强,耐粗饲等优良特性。但其产肉、产乳性能较 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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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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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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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