提高孵化器孵鹅出雏率试验效果观察

鹅的孵化一般采用火坑、水温袋和大缸等方法.近年来,不少地方采用大中型孵化器,同时,在孵化过程中改善各种条件,但出雏率和健雏率都不理想.为此,我们于1998年5～7月,在双城市站北孵化场,用大型孵化器采用新方法进行孵鹅试验,获得了出雏率和健雏明显提高的良好效果.     

采用空气离子化提高鸭蛋孵化率

本研究目的是探讨在鸭蛋孵化过程中,空气离子化对雏鸭孵化率、对孵化器内小气候的影响。试验是在一孵化养禽联合企业中进行的。试验分6批,使用了相同重量和保存期限的23000多个北京鸭种蛋。采用通常的孵化制度,用《-50》型孵化器进行孵化,其中一架孵化器用于孵试验组鸭蛋,另一架孵对照组鸭蛋。试验时,在孵化箱三个     

孵化器的操作及禽蛋的照检方法

1孵化器的操作 孵化器大致分为平面孵化器和立体孵化器两大类。平面孵化器一般为小型,均为孵化出雏同机进行。多用棒式双金属片或乙醚胀缩饼控温,可自动转蛋和均温。此类型机多用于科研、教学和珍禽的孵化。立体孵化器分为箱式孵化器和巷道式孵化器。后者适用于大规模生产。人孵器分批人孵,第18～19天移至另室,并在出雏器中出雏。     

雏鹅利用网上育雏的试验报告

雏鹅网上育雏可节省大量垫料，省去更换垫料的劳动，减少雏鹅与粪便接触的机会，减少疾病的发生，提高成活率，但育雏网成本高有些养鹅者觉得不合算，面对这一问题我们近几年进行了网上育雏与火炕育雏的对比试验，现将试验结果报告如下。１　试验方法１．１　种蛋选择选择接种过小鹅瘟疫苗后４５ｄ种鹅所生产的种蛋，抗体监测合格进行孵化。１．２　试验雏鹅与分组试验雏鹅选择在同一孵器孵化同一天出壳的健康鹅雏８００只，分二组，每组４００只。试验雏鹅选择后，从雏鹅出壳后２４ｈ开始试验，到３０日龄试验结束。１．３　试验用鹅雏采取…     

室内搭架孵鸡技术

室内搭架孵鸡,就是在孵化室内搭建多层孵化架,使整个孵化过程均在孵化架上完成,改变过去那种在炕上孵化,摊架上出雏的传统方式。搭架孵化,一是在室内四周设火道供温,把整个孵化室视为一个大孵化器,这样,不但孵化量大,出雏率高,而且免去移蛋上摊操作环节,降低劳动强度和种蛋破损率,很适宜农村专业户采用。具体操作方法如下:     

电褥子控温孵鸡

我们用电子继电器和水银导电表控制电褥子的温度,孵化鸡雏。在半张电褥子上入孵种蛋250个,孵化鸡雏211只。其中健康雏207只,出雏率为90%,健雏率89%,效果很好。具体方法如下: 一孵化前准备1.做好孵化摊床。孵化是在普通住     

温室内搭架孵鸡技术

所谓温室内搭架孵鸡,就是在孵化室内搭建多层孵化架,使整个孵化期均在架上进行。这种孵化方法,一次孵化量大,出雏率高,降低劳动强度和种蛋破损率,非常适宜农村专业户采用。我市官庄乡九女河村农民王丙田,采用此法孵鸡多年,取得较好效果,受精蛋孵化率达90％以上。一、孵化室的建造 1.孵化室的选择。孵化室就等于是一个土孵化器,所以,孵化室要求保温性能好,座北朝南,     

大中型孵化器对小批量孵化出雏率的影响原因初探

大中型孵化器对小批量孵化出雏率的影响原因初探王开飞（安徽省合肥市食品公司养鸡场２３００１１）众所周知，大中型孵化器适合大批量孵化生产，且效果良好，但当装蛋量不足满孵的１／２或只有１／３的小批量孵化时，出雏情况有时并不十分令人满意。为此，我们根据本场生...     

室内搭架孵鸡技术

室内搭架孵鸡,就是在孵化市内搭建多层孵化架,使整个孵化过程在孵化架上完成,改变过去那种在炕上孵化,摊架上出雏的传统方式。搭架孵化,一是在室内设火道供温,把整个孵化室视为一个大孵化器,这样,不但孵化量大,出雏率高,而巨免去移蛋上摊操作环节,降低了劳动强度和种蛋破损率,很适宜     

综合办站效益好

<正> 本县牛山乡畜牧兽医站位于县城西郊,全乡16个村,站内人员11名,其中退休3人,由于人员多收入少,过去连年亏损。该站为了综合办站和发展三禽生产,于1984年春初购进电机孵化设备3台,发电机组1台,总投资10700元,试搞孵化工作,历时6年.累计上炕76批,入孵量达365680枚,其中鸡蛋炕孵257100枚,受精率为85.7％,出雏193675只,出雏率为87.9％;炕孵鸭蛋(狄高、康贝尔)38260枚,受精率为85.2％,出雏61149只,出雏率为86.2％;炕孵鹅蛋25320枚,受精率为78.3％,出雏苗鹅16375只,出雏率达82.6％。一、技术措施1.东海县多种经营管理局和县畜牧兽医站对该站首次推广电机孵化技术十分重视,并委派1名专职技术干部,负责指导孵化工作,及时解决在孵化过程中出现的问题,从而使电孵生产稳步发展,在该站的     

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.