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价格综述赖氨酸是食品和饲料的营养强化剂和添加剂,在饲料中添加赖氨酸可大大提高饲料利用率、缩短饲养周期、改善动物肉质、提高产蛋率,因此受到广泛关注。据了解,近日国内赖氨酸市场意外地再度出现疯狂局面,市场价格几乎以每天1元/kg的速度上涨,近期总的涨幅在25%左右。目前进口赖氨酸的市场报价已经高达28.0～30.0元/kg,市场的普遍成交价格一般也在28.0元/kg左右,再现了去年9、10月份的暴涨行情。同时国产赖氨酸的价格也同样狂飙,目前市场的报价一般在27～28元/kg之间,普遍成交价格在26.0～27.0元/kg的范围内,而国产55%赖氨酸的报价目前… 相似文献
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赖氨酸是饲料生产中重要的添加剂．也是近年饲料添加剂市场最活跃的品种之一。由于全球养殖业快速发展，赖氨酸的需求不断增加，但近几年全球赖氨酸价格出现跌宕起伏态势，国际上和我国新建的赖氨酸生产项目如雨后春笋。世界赖氨酸市场竞争正进人多极化发展．竞争将越来越激烈，而中国在世界赖氨酸市场中正迅速崛起。下面就国际与国内赖氨酸生产情况作一简要的介绍。 相似文献
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1上半年赖氨酸市场回顾
2006年．国内赖氨酸市场价格有涨有落，价格变化呈水波状趋势。1-3月，国际赖氨酸市场需求强劲．加上节前饲料厂备货等因素影响，国内赖氨酸市场价格得以上涨。春节过后，由于养殖业持续低迷．致使饲料产量不增反降．连累赖氨酸市场亦疲软不堪。另外．在微利情况下，很多养殖户利用低价豆粕自己配料，更加大了赖氨酸市场的需求压力。在供求失衡的情况下，国内各赖氨酸厂家为争夺市场，价格战愈战愈烈．市场价格也随之走低。 相似文献
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赖氨酸是食品和饲料的营养强化剂和添加剂，在饲料中添加赖氨酸可大大提高饲料利用率、缩短饲养周期、改善动物肉质、提高产蛋率，因此受到广泛关注。据了解，近日国内赖氨酸市场意外地再度出现疯狂局面，市场价格几乎以每天1元／kg的速度上涨，近期总的涨幅在25％左右。目前进口赖氨 相似文献
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2015年上半年赖氨酸市场价格在低位区间震荡。市场供应和需求均难觅相应利好因素。主要是我国生猪存栏量和能繁母猪存栏量连续数月下滑，饲料原料需求下降，在我国赖氨酸市场消费增速下降的情况下，全球赖氨酸产能仍在持续扩张，这无疑增加了我国赖氨酸市场供大于求的现状。在上半年赖氨酸出口量大幅增加、厂家减产挺价及原料玉米价格上涨的支撑下，赖氨酸市场价格处于跌无可跌，上涨乏力的尴尬局面。本文将从赖氨酸的进出口量以及国内外市场行情等方面着手，对2015年的上半年赖氨酸市场进行回顾，并对赖氨酸价格后续走势进行简单预测，仅供参考。 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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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
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乳酸杆菌作为益生菌广泛用于人和动物.本文综述了乳酸杆菌改善宿主健康的机制.乳酸杆菌可通过产生抗菌物质如乳酸、过氧化氢、细菌素,或者通过竞争营养或肠道黏附位点来抑制致病菌;通过诱导黏附素的分泌或阻止细胞凋亡而增强肠道的屏障功能,从而保护肠道.文章重点讨论了乳酸杆菌表面成分(表面蛋白、脂磷壁酸和肽聚糖)与肠道受体(C型凝集素受体、Toll样受体和Nod样受体),阐述了他们结合后启动免疫调节信号,调控肠道免疫功能以发挥改善健康作用的机制. 相似文献
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Billinghurst RC Brama PA van Weeren PR Knowlton MS McIlwraith CW 《American journal of veterinary research》2004,65(2):143-150
OBJECTIVE: To determine whether serum concentrations of biomarkers of skeletal metabolism can, in conjunction with radiographic evaluation, indicate severity of osteochondrosis in developing horses. ANIMALS: 43 Dutch Warmblood foals with varying severity of osteochondrosis. PROCEDURE: 24 foals were monitored for 5 months and 19 foals were monitored for 11 months. Monthly radiographs of femoropatellar-femorotibial and tibio-tarsal joints were graded for osteochondral abnormalities. Serial blood samples were assayed for 8 cartilage and bone biomarkers. At the end of the monitoring period, foals were examined for macroscopic osteochondrosis lesions. RESULTS: Temporal relationships were evident between certain serum biomarkers and osteochondrosis severity in foals during their first year. Biomarkers of collagen degradation (collagenase-generated neoepitopes of type-II collagen fragments, type-I and -II collagen fragments [COL2-3/4C(short)], and cross-linked telopeptide fragments of type-I collagen) and bone mineralization (osteocalcin) were positive indicators of osteochondrosis severity at 5 months of age. In foals with lesions at 11 months of age, osteochondrosis severity correlated negatively with COL2-3/4C(short) and osteocalcin and positively with C-propeptide of type-II procollagen (CPII), a collagen synthesis marker. Radiographic grading of osteochondrosis lesions significantly correlated with macroscopic osteochondrosis severity score at both ages and was strongest when combined with osteocalcin at 5 months and CPII at 11 months. CONCLUSIONS AND CLINICAL RELEVANCE: The ability of serum biomarkers to indicate osteochondrosis severity appears to depend on stage of disease and is strengthened with radiography. In older foals with more permanent lesions, osteochondrosis severity is significantly related to biomarker concentrations of decreased bone formation and increased cartilage synthesis. 相似文献