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过去的2013年,我国的肉鸡市场延续上一年的颓势,在低迷的行情中挣扎前行,多数业内人士对这一年抱有太多的遗憾和失望。到了9~11月份,行情稍微有了好转,让大家有了些许的宽慰。笔者预测,2014年肉鸡行情总体呈现前高后低态势。 相似文献
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2013年上半年辽宁省肉鸡生产是在亏损状态下经营。其中,2013年第一季度辽宁省肉鸡生产延续2012年末态势,在正常的行情下运行,在盈利状态下经营。1、2月份因为春节效应肉鸡收购价格保持较高价位,春节过后,3月份肉鸡收购价格开始正常季节性下降。第二季度进入4月份后,随着报道上海第一例人感染禽流感病例,造成全社会对禽类产品消费信心不足,导致肉鸡收购价格出现下滑,肉鸡雏价格回落,肉鸡行情进入市场低迷状况,肉鸡生产在较大亏损状态下经营。5、6月份肉鸡收购价格开始略有上涨,但涨幅较小。 相似文献
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一2007年肉鸡行情火爆的原因
1鸡肉供用短缺
由于“非典”,禽流感,以及2002年祖代种鸡的过度扩张,导致了从2003年底至2006年上半年将近30个月的肉鸡市场的低谷期(见表1),肉种鸡存栏量大幅下降,因而引起鸡肉市场的紧张。 相似文献
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从肉鸡成本组成看影响养户经济效益的几个关键指标■王祖锁罗吉田(浙江农业大学310029)从1996年的肉鸡行情来看,肉鸡饲养业的黄金时期已经过去。肉鸡饲养从原来的高额利润转向微利状态。在这种情况下,养户必须从扩大规模和降低费用上下功夫。饲养出栏体重1... 相似文献
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计娅丽 《河南畜牧兽医(综合版)》2009,30(4)
2008年肉鸡养殖业总体形势良好.受2007年下半年行情低迷的影响,2008年上半年出栏减少,同时肉品加工企业开始为迎接奥运备货,价格一路走高.奥运期间受交通和厂家备货影响,价格平稳运行,未出现大家所期待的大幅上涨行情.年底因受金融危机和食品安全事件的影响,肉毛鸡价格急剧下滑,难以走高.2009年肉鸡行情受肉鸡存栏量及国际国内经济形势的影响很大,如无特殊情况,将随经营模式的优化和经济形势的好转出现上涨. 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