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我国规模化养鸡环境控制技术的最新进展 总被引:3,自引:0,他引:3
《中国家禽》2019,(9)
现代养鸡生产大多采用高产品种,这些品种对不利养殖环境的适应能力弱,对鸡舍建筑与环境控制技术的要求提高。养殖设施环境条件成为影响规模养鸡的健康和生产性能的关键。文章从规模养鸡的健康环境及其调控技术角度,围绕鸡场生物安全工程防疫系统、鸡舍建筑与环境控制技术、福利养殖新工艺与设施设备等三个方面介绍了我国规模鸡场建设与环境控制技术取得的主要成就及研究进展。 相似文献
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中美蛋鸡生物安全与疾病防控的比较与思考 总被引:1,自引:1,他引:0
作者于2010年3~4月,考察了美国有代表性的蛋鸡生产企业,参加了美国蛋品工业大会,与美国爱荷华州立大学的教授及研究人员就蛋鸡生产的育种技术、饲料技术、疫病防治技术、环境控制技术和养鸡福利等进行了详细讨论,对中国与美国蛋鸡生产过程中生物安全与疾病防控进行比较与思考,提出我国蛋鸡生产在疾病防控方面应该重点在从下几方面完善:①重点在养殖设施上进行投入和改进,如饮水系统、喂料系统、集蛋系统以及鸡舍通风系统,为疾病的控制提供良好的基础条件;②建立完善的病死鸡无害化处理的配套设施;③通过蛋鸡产业技术体系建设,组织有关岗位科学家针对我国主推品种,研究建立准确的疾病控制方案,建立完善的生物安全体系及技术规程;④通过蛋鸡产业体系建设,建立禽病监测平台和体系,充分发挥大学和研究院所的技术优势,加强与企业在疾病防控方面的合作与指导,开展培训,提高从业人员的技术水平,降低疾病风险,提高养殖效益、保障蛋品的质量安全。 相似文献
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关于次氯酸钠消毒液及其使用情况介绍邹杰北京华都肉鸡联营公司中心兽医室(102211)我们北京华都肉鸡联营公司已具有十多年的发展历史,形成了产。供、销及其他配套设施齐全的大型现代化肉鸡生产服务体系。多年来的大规模集约化养鸡及周围众多的农民养鸡户养鸡,使... 相似文献
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随着规模化养鸡的快速发展,养鸡业的集约化、工业化程度不断提高,鸡舍小气候环境对鸡的健康和生产性能的影响愈来愈大.因此,规模化养鸡的环境控制技术要不断跟上现代养鸡生产的需要,适时调整养鸡环境控制的目标和策略,不断研究开发与应用新型的鸡舍环境控制技术与装备,为现代养鸡业的健康安全生产做好保驾护航和技术支撑作用. 相似文献
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目前国内养鸡业已逐渐形成,钴种优良化、饲料全价化、饲养规模化的格局,但仍不能有效地控制疫病。疫病的频发,一直困扰着鸡业的健康发展。养鸡环境与设施的缺陷是疾病发生的隐患,同养鸡发达国家相比,我国目前养鸡行业在品种、饲料和疾病防治技术上差距逐渐缩小,而在环境与设施方面差距仍然相当大。 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