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我国主要畜牧业肉类产量的时空分析——基于空间自相关和重心轨迹的方法 《畜牧与饲料科学》2016,37(6):93-93
利用GeoDa软件对我国猪肉产量、牛肉产量和羊肉产量的分布进行分析,得出以下结论:我国的猪肉产量、牛肉产量和羊肉产量都呈现上升的趋势,但它们的变动速率在不同的时期是不同的;我国猪肉产量、牛肉产量和羊肉产量都呈现聚集状态,猪肉产量的聚集显著性在上升,而牛肉产量和羊肉产量的聚集显著性在下降,猪肉产量主要聚集在南方,而牛肉产量和羊肉产量主要聚集在北方;猪肉产量的重心轨迹在湖北省境内向东南方向移动,牛肉产量的重心轨迹在山西省境内向西移动,羊肉产量的重心轨迹在陕西省境内向北移动。 相似文献
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<正>经合组织(OECD)和联合国粮农组织(FAO)预计,未来10年全球猪肉产量将继续稳定增长,但其增长水平却远无法达到禽肉增长的水平。除欧洲以外所有大洲的猪肉产量均增加;亚洲仍将是全球猪肉生产的主力;亚洲和北美洲猪肉产量增加最多;非洲、拉丁美洲和大洋洲猪肉增产量较少;欧洲猪肉产业虽在萎缩,但仍是全球猪肉生产中仅次于亚洲的第2个核心地区;发展中国家猪肉产量份额将继续上升;人造肉在肉类总消费中占比虽将有所增加,但也不大可能对肉类市场造成较大冲击。 相似文献
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世界猪肉市场现状及发展趋势 总被引:1,自引:0,他引:1
<正>1世界及主要生产国猪肉产量根据美国农业部的预测,全球猪肉产量2012年以来呈增长趋势,全球产量从2011年的10 358.1万吨增至2015年的11 145.8万吨,年增长率分别为3.2%、1.8%、1.6%和0.8%,增长趋于平缓。在主要的猪肉生产国中,韩国、俄罗斯、墨西哥和中国增速较快,近5年产量年均增加9.7%、6.2%、2.7%和2.7%,欧盟、加拿大和日本等发达国家猪肉产量 相似文献
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<正>猪肉在我国人民消费和畜牧业生产中具有举足轻重的地位。2009年我国肉类产量达7 350万t,约占全世界肉类总产量的1/3;其中猪肉产量占到4 891万t,占全国肉类产量的63.9%。安全猪肉产品的生产受到各方面的关注,但是由于源头污染控制难度大、溯源管理方式落后、法律法规执行不力及监管难度大等原因,大量有毒有害猪肉流入市场。在猪肉的初加工环节,屠宰检疫起着遏制重大动物疫病、寄生虫病和人畜共患病传播扩散和有害猪肉产品进入市场的作用。在诸多动 相似文献
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<正>1世界猪肉市场概况1.1世界主要猪肉交易市场产量概况据美国农业部数据显示(图1),2010—2014年,中国猪肉产量遥遥领先于世界其他国家,占有世界猪肉总产量的51.08%,欧盟以及美国紧随其后。中国、欧盟、美国的猪肉产量就占据了世界猪肉总生产量的80%。美国农业部预计,2015年,中国以及美国的猪肉生产量会继续上扬,而欧盟的猪肉产量将会下滑,但是三者总的猪肉生产量占世界总产量的份额变化不 相似文献
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2004年我国生猪产量增长,养殖热情较高,生产效益良好。鲜冷冻猪肉出口增加,进口减少;加工猪肉出口增加,进口下降;活猪出口增加;猪杂碎出口、进口都增加。与去年同期相比,2004年生猪和猪肉价格上涨;产区猪肉价格上涨幅度大于销区,猪肉价格涨幅低于生猪价格上涨幅度。全球猪肉产量增加,价格上涨。 相似文献
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据中国畜牧兽医信息网消息 :美国农业部专家预测 ,2003年欧盟国家的猪肉产量和进口量将实现双增长 ;美国猪肉产量趋减 ,但出口量继续攀升 ;日本虽实行保护关税 ,但猪肉进口量仍将创历史新高 ;俄罗斯经济状况的改善 ,将进一步刺激猪肉的消费和进口 ;巴西和加拿大的猪肉出口增速将有所减缓。世界猪肉市场发展态势将呈现以下特点 :由于需求旺盛 ,猪肉贸易可望大幅攀升 ,出口总量将达创纪录的390万吨 ,预计比2002年出口量增加2 %。美国 :由于饲料价格上扬和担心猪肉产量过剩 ,美国2003年的猪肉产量有可能比2002年水平下降2 %。但为充分利用国际… 相似文献
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2004年第3季度我国生猪产量增长,养殖热情高,生产效益良好。鲜冷冻猪肉出口量增加,进口量减少;加工猪肉出口增加,进口下降;活猪出口增加;猪杂碎出口、进口都增加。与上年同期相比,2004年第3季度生猪和猪肉价格上涨;产区猪肉价格上涨幅度大于销区,猪肉价格涨幅低于生猪价格上涨幅度。美国猪肉产量增加,而价格有所下降。 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