猪的生物学特性及其在工厂化生产中的利用

本文论述了猪的繁殖、生长发育、采食、感觉、感温、群居、生活栖息习性及其在养猪工厂化生产中的利用方向和方法，对发展猪的工厂化生产，提高工厂化养猪水平具有一定的指导意义。     

工厂化养猪简述

自八十年代末期以来,我省工厂化养猪发展较为迅速,为了使大家对工厂化养猪有一个较为明确的了解,更好地结合本省实际,促使工厂化养猪健康发展,现就“工厂化养猪”作一简要的介绍。 “工厂化养猪”就是采用工业生产方式的养猪方法。它是养猪现代化的重要组成部分,它采用最新科学技术、设备和管理,为猪只创造高效生产的优良环境,使猪群的生长速度、     

现代化猪场猪肺炎发病率上升的原因

现代化养猪生产中,猪肺炎发病率的上升与猪固有的解剖生理特点以及相关病原微生物进化适应有关,更与现代养猪生产中集约化、工厂化的生产环境、人们局限性认识与措施有关。分析其发生原因,     

规模化养猪场建筑设计弊端

集约化养猪标志着养猪生产进入了工厂化阶段，以其高密度、高产出、高效益为主要特征。然而，人们在片面追求三高的同时，一些违背猪的生物学特性的建筑设计，正威胁着猪的健康．给养猪生产带来不良后果．     

工厂化养猪（一）

１工厂化养猪的概述１．１工厂化养猪的发展概况世界养猪业的主要趋势,是朝着生产的集约化、工厂化发展。工厂化养猪是现代养猪业的重要组成部分,它以工业生产方式,采用现代化的技术和设备密集饲养,进行高效率的养猪生产,使猪群的成活率、生长速度、饲料利用率,以及...     

工厂化猪场兽医工艺研讨会在昆明召开

机械化养猪协会于一九八六年十一月四日至六日在云南省昆明市召开工厂化猪场兽医工艺研讨会。白云机械化猪厂、马三家机械化养猪试验场等一批七十年代中期建场的工厂化猪场派代表出席,交流了十年多来国内推行工厂化养猪的兽医经验与教训。一致认为工厂化猪场的集约化生产方式以及较大规模(一般     

宝安举办工厂化养猪育种技术报告会

<正> 为了加速我国工厂化养猪猪种配套体系,育种是工厂化养猪工艺的重要内容,工艺成效集中体现在工厂化猪场育出的猪种上。高设备投入的工厂化猪场要取得高经济效益就靠高产猪种。看一个养猪企业的育种工作,主要看是否建立了繁育体系。目前我国的工厂化猪场虽已取得很大的进展,但是还未有一个工厂化猪场已完成繁育体系的建设,而且大多数猪场对此还认识模糊,工作未有真正起步。为此中国养猪协会(筹)、全国机械化养猪协会和广东省养猪研究会于     

采用现代养猪工艺创建工厂化猪场

工厂化养猪工艺特点1　分段作业 ,均衡生产工厂化养猪场的分段作业流水线 ,是工厂养猪管理的核心。养猪工艺采取分阶段饲养 ,有四阶段、五阶段、六阶段不等 ,其共同点是把配种—怀孕—分娩—保育和生长育肥 ,形成一条龙连续流水作业生产 ,将同批猪实行“全进全出”。我国工厂化     

养猪场内饲养环境的要求

养猪,尤其是现代工厂化养猪的生产效果,既取决于猪本身的健康状况、遗传性能和生产水平,又取决于饲喂饲料的数量和质量,同时也取决于猪所处的生存和生产环境。然而,环境这个重要因素常被饲养者所忽视,以致养猪出现寡产、多耗、低效的态势,     

工厂化养猪场生产流程的设计与应用

工厂化养猪生产的工艺特点是连续作业的生产方式,俗称流水式生产流程,是根据猪的生物特性及生长发育过程,揉合了工业流水线生产的原理设计、建立的。本项目以500头生产母猪为一条工厂化养猪生产流水线,根据母猪的配种保胎、分娩、仔猪保育、生长猪育肥的四阶段饲养的工艺流程,全程采用铸铁漏粪板架空饲养,是一种先进、环保的饲养模式。     

中国饲料工业协会第五届理事会顾问、会长、常务副会长、副会长、秘书长、副秘书长、常务理事、理事名单

顾问刘中一张德邻宋瑞祥聂振邦张子仪戎易王维四会长白美清国务院原副秘书长、第四届理事会会长常务副会长(8人,以姓氏笔划为序)刘永好新希望集团董事长、第四届理事会副会长刘汉元通威股份有限公司董事长、第四届理事会副会长陈丹广东恒兴集团股份有限公司董事长、第四届理事会副会长张延喜农业部原副部长、第四届理事会副会长吴明夏湖南正虹科技发展股份有限公司董事长、第四届理事会副会长陶一山唐人神集团股份有限公司董事长、第四届理事会副会长温鹏程广东温氏食品集团有限公司董事长、第四届理事会副会长谭竹洲原化学工业部副部长、第…     

Evidence for the non-involvement of the uterus in the lifespan of the corpus luteum in the cyclic dog

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.     

浅谈对症用药

对症用药就是通过对患病信鸽的症状进行诊断,进而确定病属,选择药物及如何用药的方法。     

军犬鉴别中的嗅源培养和易出现的问题及对策

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.……     

The influence of the width of the saddle tree on the forces and the pressure distribution under the saddle

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.     

Observations on the Pathology of the Spleen of the Cat

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.