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3种冷季型草坪草混播配方优化组合筛选试验 总被引：3，自引：0，他引：3
在河西走廊中部地区气候条件下,通过对草地早熟禾Poa pratensis、高羊茅Festuca arundinacea、多年生黑麦草Lolium perenne3种冷季型草坪草18种混播配方进行了成坪品质的观察测定,筛选出了适应当地气候条件的优化组合配方10个。 相似文献
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<正>1分阶段精细饲养技术的应用现状为了达到精准饲养的目的,牧原食品有限公司(以下简称牧原)针对不同的季节和温度、不同的猪群设计了57种配方(表3),每周调整1次,然后依据反馈的应用结果对配方进行修正。牧原公司依据季节和温度的不同,设计了3种日粮配方,即春秋季、夏季和冬季;依据猪群的不同则设计了23种配方;种公猪和泌乳母猪不同季节用同一配方。在设计配方时主要考虑了以下四个要素:一是猪在一定季节和温度条件下的维持需要。二是猪群的生长增重,育肥 相似文献
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鳖是一种肉食性动物,在天然条件下,多以螺、蚌、鱼、虾为食。但在人工集约化养殖的条件下,天然饵料的来源往往不足,且天然饵料的价格也较高。这就在某种程度上限制了养鳖业的发展。而发展人工配合饲料是降低养鳖成本,满足鳖生长所需营养的必由之路。笔者介绍几种鳖的人工饲料配方,以供广大养殖户参考。配方一:日本发展人工养鳖,采用的是鳗鱼的人工饲料配方。结果,不仅雌鳖产卵多,而且幼鳖生长快,料肉比达到了3∶1。目前,我国的一些养殖场,参照鳗鱼的饲料配方配制鳖的饲料,也取得了成功的经验和良好的效果。其配方和制作方法是:鱼粉35%、麸皮… 相似文献
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种公猪精液稀释直接影响精虫活力有效保存时间.同一公猪精液用不同配方稀释后,在相同环境条件下保存,其保存的时限差异较为明显.1978年,我站曾对有关资料提供的8个配方分3批设置10个组(原精液2个组)进行对比试验,从中筛选出第5号配方在全州推广,1992年以5号配方为对照与增加磷酸氢二钠,改变其它3种药品用量的配方作引证对比试验,现报告于后. 相似文献
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研究不同冷冻液配方对鸡囊胚细胞的玻璃化冷冻保存效果。对新鲜种蛋囊胚细胞分离提纯后,在DMEM中添加不同的冷冻保护剂DMSO（二甲基亚砜）、EG（乙二醇）、蔗糖,分别组成6种玻璃化冷冻保护液,进行超低温冷冻保存。复苏后通过苔盼蓝染色测定活细胞存活率。结果：玻璃化冷冻保存中,囊胚细胞在玻璃化冷冻液配方2（10％EG＋10％DMSO＋0．5mol／L蔗糖＋20％FBS＋DMEM）条件下复苏后存活率最高（71．32％）,与玻璃化冷冻液配方1和3条件下复苏后存活率之间差异显著（P〈0．05）,且与玻璃化冷冻液配方4、5、6条件下复苏后存活率之间差异均极显著（P〈0．01）,可以作为鸡囊胚细胞的玻璃化冷冻液。 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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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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本试验旨在研究两种绿头鸭（白羽绿头鸭和绿头鸭）肌肉营养组成和价值,为绿头鸭肉产品的开发利用提供基础数据和理论依据。选择白羽绿头鸭和绿头鸭60只（每个品种各30只,公母各半）,依照国家标准测定胸肌粗蛋白质、粗脂肪、胆固醇含量及氨基酸、脂肪酸、微量元素和维生素的组成和含量,并对胸肌进行氨基酸评价及脂肪酸营养价值评价。结果显示,白羽绿头鸭肌肉粗蛋白质含量显著低于绿头鸭（P<0.05）;两种绿头鸭肌肉中均检测到17种含量大于0.01%的氨基酸,其中白羽绿头鸭肌肉苏氨酸、组氨酸、丝氨酸和脯氨酸含量显著高于绿头鸭（P<0.05）,赖氨酸、谷氨酸和精氨酸含量显著低于绿头鸭（P<0.05）;检测到13种含量均大于0.01%的脂肪酸,其中白羽绿头鸭硬脂酸和油酸含量显著低于绿头鸭（P<0.05）;检测到9种矿物质元素（钠、镁、钾、钙、锰、铁、铜、锌和硒）,两种绿头鸭差异不显著（P>0.05）;检测到8种维生素,白羽绿头鸭肌肉维生素B1含量显著高于绿头鸭（P<0.05）,维生素D和维生素E含量显著低于绿头鸭（P<0.05）。两种绿头鸭肌肉氨基酸比例接近世卫组织推荐的理想模式,富含人体所需的矿物质元素和维生素,具有广阔的开发利用前景。 相似文献
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Reasons for performing study: Clinical experiences indicate that centesis of the lateral compartment of the femorotibial joint is often unsuccessful. Objective: To determine the accuracy of 2 published and 2 unpublished techniques of centesis of the lateral compartment of the femorotibial joint. Hypothesis: It was hypothesised that a drug can be administered into the lateral compartment of the femorotibial joint via a diverticulum of this joint that surrounds the medial aspect of the long digital extensor tendon and that this technique is more accurate than described techniques of centesis of this compartment. Methods: Twenty‐four stifles of 12 horses were divided equally into 4 groups and a radiocontrast medium injected into the lateral compartment of the femorotibial joint of each group using a hypodermic needle inserted: 1) caudal to the lateral patellar ligament and proximal to the tibial plateau, 2) caudal to the long digital extensor tendon and proximal to the tibial plateau, 3) between the long digital extensor tendon and bone of the extensor groove of the tibia or 4) directly through the long digital extensor tendon until it contacted bone. Twelve veterinary students who had no experience using any of these techniques performed the injections. Accuracy of each technique was determined by examining radiographs obtained after injecting the contrast medium. Results: The most successful technique for arthrocentesis was by inserting a needle through the long digital extensor tendon. This approach was successful in all attempted cases, whilst other techniques had lower rates of success. Conclusions: The lateral compartment of the femorotibial joint can be accessed accurately by inserting a needle through the long digital extensor tendon as it lies within the extensor groove. Other techniques may not be as accurate for clinicians inexperienced in arthrocentesis of the lateral compartment of the femorotibial joint. 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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Marioni-Henry K Vite CH Newton AL Van Winkle TJ 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2004,18(6):851-858
A retrospective review of records of 205 cats with histologically confirmed disease of the spinal cord was performed to identify the prevalence of disease in this nonrandomly selected population of cats. Clinical records were reviewed, and age, duration of neurologic illness, and clinical and histopathologic findings in cats with spinal cord disease were abstracted. Disease processes were classified into 7 categories and 23 groups. The most common diseases affecting the spinal cord of cats were feline infectious peritonitis (FIP), lymphosarcoma (LSA), and neoplasia of the vertebral column secondarily affecting the spinal cord. Information on age, onset and duration of clinical signs, and lesion localization at the postmortem examination in cats belonging to the 7 categories of disease were analyzed to create a practical list of differential diagnoses. Cats were also subcategorized into 3 groups based on their age at death. FIP was the most common disease of cats younger than 2 years of age. LSA and vertebral column neoplasia were the most common diseases affecting cats between 2 and 8 years of age. Vertebral column neoplasia was the most common disease affecting cats older than 8 years of age. Results of this histopathologic study showed that FIP and LSA were the most common disease processes affecting the spinal cord of cats. However, at least 21 other groups of diseases and their relative prevalence were identified. 相似文献
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根据JJF1059-1999《测量不确定度评定与表示》建立了高效液相色谱法测定鸡肉中土霉素残留测量的不确定度评定方法,评定过程包括建立测量程序、分析不确定度来源、对不确定度分量进行量化。将不确定度归类为两大类。随机效应导致的不确定度可以通过一系列具有统计意义的重复观测值进行A类评定;系统效应导致的不确定度通过各测量器具、设备的说明书、校准证书提供的参数进行B类评定。本方法鸡肉中土霉素残留量的相对合成标准不确定度约为3.9%。 相似文献
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以5个金柑属品种、枳壳、软枝酸橘及广西土柠檬实生苗为材料，进行复水成活率、旱害指数、叶片相对含水量、超氧化物歧化酶（SOD）、过氧化物酶（POD）、过氧化氢酶（CAT）、丙二醛（MDA）、脯氨酸等生理指标及隶属函数的综合分析，为柑橘抗性砧木品种选育提供参考。结果表明：胁迫20d复水后的成活率融安滑皮金柑和长寿金柑最高，为100%，软枝酸橘最低，为88.9%；随着干旱胁迫加剧，各品种的旱害指数呈上升趋势，长寿金柑的旱害指数最低，为0.25，软枝酸橘的旱害指数最高，为0.61；从叶片相对含水量的结果来看，长寿金柑的变化幅度最小，软枝酸橘的变化幅度最大，在第18d时分别为61.19%和37.85%；3种保护酶之间相互协同作用减轻植株受害程度，其活性变化幅度与丙二醛和脯氨酸的含量变化相似。利用隶属函数法综合分析，得出各品种的抗旱性强弱依次为长寿金柑>枳壳>融安滑皮金柑>融安金柑>山金柑>广西土柠檬>金枣>软枝酸橘。 相似文献