共查询到20条相似文献，搜索用时 109 毫秒
1.
非洲猪瘟病毒从2018年下旬入侵我国,对我国生猪养殖产业造成重创,导致生猪养殖的数量和规模锐减,经济损失严重,对我国畜牧养殖产业的科学发展以及我国经济的平稳运行均造成巨大威胁。目前非洲猪瘟还会导致我国生猪的出栏量显著下降,猪肉产品价格显著提高,通过分析了解现阶段非洲猪瘟导致的影响可加强应对非洲猪瘟的防控措施,改善目前生猪养殖产业发展的方向,恢复生猪养殖生产,保障我国猪肉市场的供应。该文对非洲猪瘟对我国生猪养殖产业的影响、应对措施及未来的展望进行论述。 相似文献
2.
2019年世界猪肉产量有较大幅度下降,总产为10613万吨,比2018年下降了6.03%,其中世界最大猪肉生产国中国的产量下降幅度巨大,下降幅度为13.95%。长期以来中国的生猪生产与消费占据着世界的半壁江山,2019年受到非洲猪瘟疫情的影响,中国生猪产量大幅度下降,猪肉进口大幅度上升,导致了世界整体猪肉产量的下滑以及猪肉贸易量的大幅度上升。2020年中国猪肉产能下滑趋势将得到缓解,但是供给紧缺、进口增加的态势将持续,将对世界猪肉生产以及贸易格局带来巨大影响。世界第二、第三大猪肉进口国日本与墨西哥的猪肉生产稳定,猪肉价格平稳上升,猪肉进口量2019年也有一定增长。随着中国的猪肉进口需求量增加,预计2020年全球猪肉贸易量会有一定上升,美国、欧盟等主要猪肉出口国的猪肉产量将有一定增长,下面详细考察2019年世界生猪产业的发展情况并对2020年的走势做出初步判断。 相似文献
3.
自2019年非洲猪瘟在我国首次出现以来,该疫病给我国养猪业造成了毁灭性的打击,造成国内生猪存栏急剧减少,猪肉产量降低,国内猪肉价格升高,对我国生猪养殖业和猪肉食品安全造成了严重的威胁。非洲猪瘟疫情是由非洲猪瘟病毒感染引起猪只大量死亡的一类烈性传染病,因此了解非洲猪瘟的流行病学特点和非洲猪瘟病毒的特征,在非洲猪瘟疫情防控方面十分重要。本文对非洲猪瘟病毒的病毒学特点和非洲猪瘟的流行病学特点等进行综述,为非洲猪瘟疫情的防控、相关抗非洲猪瘟病毒的药物和疫苗的研发提供参考。 相似文献
4.
5.
6.
7.
2019年受非洲猪瘟疫情的影响,我国生猪产能大幅下滑,2019年猪肉产量为4 255万吨,同比下降21.26%;2019年全国生猪出栏量为54 419万头,同比下降21.57%,年末生猪存栏31 041万头,同比下降27.5%。受供给紧缺影响,2019年生猪价格显著上升,生猪月度平均价格为21.30元/kg,同比上升64.53%;猪肉月度平均价格为33.95元/kg,同比上升51.22%。受非洲猪瘟以及新冠肺炎疫情双重影响,预计2020年上半年猪肉产量同比有明显下降,下半年将逐步恢复,在新冠肺炎疫情和非洲猪瘟疫情风险逐步得到控制后,预计2021年我国生猪产能将恢复到非洲猪瘟疫情之前的水平。国内供给偏紧带动猪肉进口增加,我国猪肉供给紧缺造成价格的上涨,同时也引起了牛、羊、鸡肉等猪肉替代产品的需求上升和价格上涨,最后导致牛、羊、鸡肉进口量的上升。2020年我国猪、牛、羊、鸡肉进口量将保持上升态势。 相似文献
8.
王伟芳 《畜牧兽医科学(电子版)》2021,(4):192-193
我国生猪养殖产业受到非洲猪瘟的影响,生猪养殖产业链结构、生猪消费市场结构及猪肉贸易等方面均发生重大变化,繁殖母猪存栏量显著下降,生猪养殖数量和规模受到重创,同时猪肉进口量创新高。现阶段我国国务院及农业农村部等相继出台一系列的非洲猪瘟防控政策和方案,保障疫病良好控制及我国生猪养殖产业科学恢复,猪肉畜牧产品价格获得一定的回落。该文将对现阶段我国生猪养殖产业市场的供需情况,非洲猪瘟疫情下我国生猪养殖市场中价格波动特点及下一阶段非洲猪瘟的防控对策和建议等进行介绍,促进我国生猪养殖产业健康发展。 相似文献
9.
10.
2018年8月以来受非洲猪瘟疫情的影响,我国生猪产能大幅度下滑,2019年猪肉产量为4255万吨,同比下降21.26%;2019年全国生猪出栏量为54419万头,同比下降21.57%,年末生猪存栏31041万头,同比下降27.5%。目前我国生猪产业正处于产能恢复的关键时期。2020年1月,非洲猪瘟造成的产能大幅下跌态势还没有得到缓解,新型冠状病毒肺炎又至,1月23日武汉市实施封城,随后各地相继采取封城、暂停公共交通、封路、人员居家隔离、集聚性产业停业等系列措施,这些措施在防控疫情的同时也限制了生猪生产相关物资与人员的流通。在非洲猪瘟和新冠肺炎疫情双重压力下,2020年我国生猪复产的道路变得更加艰难。文章从当前我国生猪产业的现状与挑战以及2020年度生猪产业经济领域发展趋势,两个方面展开论述,分析我国生猪产业面临的挑战并对未来我国生猪市场行情做出适当的预测。 相似文献
11.
12.
Evidence for the non-involvement of the uterus in the lifespan of the corpus luteum in the cyclic dog 总被引：1，自引：0，他引：1
Progesterone levels in peripheral blood of dogs were analysed during the cycle in which hysterectomy (n = 5) or sham surgery (n = 3) was performed as well as during the cycle of dogs (n = 5) hysterectomized at least one year prior to this study; the data were compared with the findings in control dogs (n = 3). The averages of the duration of the luteal period observed in the three experimental groups were not significantly different from those of control dogs. Immediately after surgery, the progesterone level decreased from 25 to 50% of the presurgical level, but returned to presurgical level in about four days. Prolactin levels were elevated for about 30 h after surgery. Nevertheless, the averages of the mean prolactin levels for each animal during the luteal period of the experimental groups were not significantly different from those of control dogs. It is concluded that in the dog, the uterus is not involved in the lifespan of the cyclic corpus luteum. 相似文献
13.
14.
15.
Meschan EM Peham C Schobesberger H Licka TF 《Veterinary journal (London, England : 1997)》2007,173(3):578-584
As there is no statistical evidence that saddle fit influences the load exerted on a horse's back, this study was performed to assess the hypothesis that the width of the tree significantly alters the pressure distribution on the back beneath the saddle. Nineteen sound horses were ridden at walk and trot on a treadmill with three saddles differing only in tree width. Kinetic data were recorded by a sensor mat. A minimum of 14 motion cycles were used in each trial. The saddles were classified into four groups depending on fit. For each horse, the saddle with the lowest overall force (LOF) was determined. Saddles were classified as "too-narrow" if they were one size (2 cm) narrower than the LOF saddle, and "too-wide" if they were one size (2 cm) wider than the LOF saddle. Saddles two sizes wider than LOF saddles were classified as "very-wide". In the group of narrow saddles, the pressure in the caudal third (walk 0.63 N/cm(2)+/-0.10; trot 1.08 N/cm(2)+/-0.26) was significantly higher compared to the LOF saddles (walk 0.50 N/cm(2)+/-0.09; trot 0.86 N/cm(2)+/-0.28). In the middle transversal third, the pressure of the wide saddles (walk 0.73 N/cm(2)+/-0.06; trot 1.52 N/cm(2)+/-0.19) and very-wide saddles (walk 0.77 N/cm(2)+/-0.06; trot 1.57 N/cm(2)+/-0.19) was significantly higher compared to LOF saddles (walk 0.65 N/cm(2)+/-0.10/ 0.63 N/cm(2)+/-0.11; trot 1.33 N/cm(2)+/-0.22/1.27 N/cm(2)+/-0.20). This study demonstrates that the load under poorly fitting saddles is distributed over a smaller area than under properly fitting saddles, leading to potentially harmful pressures peaks. 相似文献
17.
18.
嗅源是军犬嗅觉作业训练的依据.军犬鉴别中嗅源能力的培养在整个鉴别训练中占有重要地位,关系到鉴别训练的成败和鉴别能力的提高.所以,军犬在嗅认嗅源时必须按照训犬员的指令充分、细致地感受嗅源气味,并且对嗅源气味产生兴奋反应.如何培养军犬充分嗅认嗅源以及及时解决嗅认过程中出现的问题,成为我们进行鉴别训练的关键.…… 相似文献
19.