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<正> 养猪业是农区畜牧业的重要组成部分,养猪生产的发展情况直接影响国民经济收入和人民生活水平。近几年来,全国养猪业生产不断提高,养猪产品率不断增长。但是,当前养猪生产也还存在一些问题急待解决。为了加速实现我国养猪业现代化,特别是北京郊区养猪业现代化问题,现根据我国或北京郊区具体情况和条件,结合国内外先进经验,就发展养猪生产问题,提出几点看法和建议。 相似文献
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随着养猪业生产水平的不断提高,规模化养猪已经成为我国养猪业的主要发展趋势。饲料生产的工业化、母猪生产的工厂化和相对封闭密集的饲养环境使一些危害养猪业的主要疾病得到了有效控制,显著提高了养猪业的生产水平和经济效益。但是封闭密集的饲养环境也极易造成寄生虫病的重复感染、交叉感染和混合感染。在一些重大传染性疾病得到有效 相似文献
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《中国畜牧兽医文摘》2016,(2)
近几年来,随着我国养猪业的不断发展,不仅让我国的生产效率得到提升,也让人们对猪肉的需求得到了很大满足,同时,规模化养猪业很大程度地带动了农村经济的发展。但与此同时,养猪业的发展也给我国的生态环境造成了非常严重的污染。本文分析了养猪场实施生态绿化工程的意义,并在此基础上探究养猪场实施生态绿化工程的方法。 相似文献
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饲料成本占养猪业成本的70%以上。养猪业者必然精心选择适宜的饲料,既要生产出优质生猪产品,又要降低饲养成本,以获得最高的经济效益。特别是经济发达地区,养猪业基本实现了集约化、专业化,这些地区的养猪业者更是如此。饲料产品必须不断满足养猪业者和市场的要 相似文献
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随着社会经济的不断发展,我国养猪业的发展也是越来越迅速的,并且随着生产规模化的发展以及市场需求的不断扩大,养猪业的废渣逐渐的规模化.但是随着养猪业规模化的发展,猪场疫病的防控也就显得越来越重视,所以本文就主要是对规模化猪场疫病防控的关键环节进行了分析和研究,并且还提出了相关的改进措施,希望通过本文的阐述,可以为养猪业的发展提供一些借鉴. 相似文献
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陈方 《广东畜牧兽医科技》2013,38(4):49-50
随着人民生活水平和生活质量的日益提高,人们对猪肉的需求也不断攀升,使市场呈现活跃的势头,尤其是能繁母猪的补贴等政策,也促进了养猪业的迅速发展。但是养猪业是一项投资多,风险大的行业。一方面,随着生猪数量的不断增加, 相似文献
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段载金 《江西畜牧兽医杂志》2012,(2):1-3
<正>近几年来我国养猪业快速发展,极大地满足了人们对猪肉及其产品的消费需求。我国是世界养猪生产和消费第一大国,但是我国养猪业与先进国家相比,还有相当大的差距,如我国母猪年生产能力较低、使用年限较短、哺乳仔猪和育成猪死亡率较高。当前猪病的发生和流行非常复杂,对养猪业构 相似文献
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包括养猪业在内的畜牧业是我国国民经济中的一个重要产业,是广大农民增收致富的有效途径,优势突出,前景广阔。特别是改革开放以来,我国养猪业迅速发展,水平不断提高,已经成为世界上最重要的生猪生产国家,生猪出栏总量呈继续增长的趋势。但是,随着我国加入WTO和动物疫病形势严峻,生产方式落后,养猪业的风险性不断加大,以至于近年来我国养猪业跌入低谷,发生剧烈波动,难以平稳发展。 相似文献
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生产方式的变革是今后养猪业发展的基础动力何正东(江苏省农林厅畜牧局)我国养猪生产的基本格局是千家万户的零星散养,在这种传统的生产方式下,我国养猪业取得了丰硕的成果。但是,随着市场经济的全面推行,这种自给自足的小生产方式的弊端也是显而易见的,养猪生产力... 相似文献
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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
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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
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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
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Observations on the Pathology of the Spleen of the Cat 总被引:1,自引:0,他引:1
Abstract— Lesions were found in the spleen of four of sixty-three cats examined post mortem in the department, and comprised two examples of lymphosarcoma, one of chronic fibrinous peritonitis and one of subcapsular haematoma. Abnormalities were found in two cat spleens received from veterinary surgeons in general practice. In one cat the abnormalities were an haemangiosarcoma with secondary deposits in the liver and in the other extensive mast cell infiltration. In addition lesions were detected in the spleen of three of eighty-seven cats examined post mortem in general practice. The lesions were: multiple secondary deposits of adenocarcinoma from a primary tumour of the mammary gland, a ruptured spleen and a foreign body below the splenic capsule. Résumé— L'examen microscopique de soixante-trois chats pratiqué dans le service a permis de rencontrer quatre fois des lésions de la rate, dont deux lymphosarcomes, une péritonite capsulaire fibrineuse et un hématome sous-capsulaire. D'autre part des lésions ont été trouvées dans deux rates de chat expédiées par des vétérinaires exerçant en pratiaue générale. Chez un chat il s'agissait d'un htmangiosarcome avec métastases hépatiques et chex l'autre d'une infilt ation diffuse par des mastocyta. De plus, on a rencontré des llésions dnas la rate de trois chats parmi quatre-vingt sept autopsies effectuées dans le cadre d'une clientèle génárale. Ces iésions étaient dés métastases multiples d'un adénocarcinome dont la tumeur primitive siègeait dam la glande mammaire, une rupture de la rate et un corps érangers sou capsulaire. Zusammenfassung— Läsionen der Milz wurden bei vier von dreiuiidsechzig in dieser hbteilung sezierten Katzen gefunden, und zwar in zwei Fällen ein Lymphosarkom, in einem Falle eine chron-ische fibrinöse Peritonitis und in einem ein subkapsuläres Hématom. Anomalien fanden sich auch in der Milz von zwei Katzen, die aus der tierxrztlichen Praxis eingesandt wurden. Bei der einen Katze war dies ein Hämangiosarkom mit Metastasen in der Leber, bei der anderen eine weitläufige Infiltration der Mastzellen. Außerdem wurden bei drei von siebenundachtzig in der Praxis sezierten Katzen Milzläsionen gefunden. Diese bestanden am multiplen Metastasen eines Adenokarzinoms der Brustdrüse, einer Milzzerreissung und einem Fremdkörper unterhalb der Milzkapsel. 相似文献