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《养殖与饲料．饲料世界》2003,(4):53-53
众所周知,养殖特种畜禽比常规畜禽品种的经济效益显著,特别是目前我国家禽生产已经出现了结构性的供过于求,受饲养方式和传统管理意识的局限,其利润空间已经微乎其微。但由于传统饮食习惯的因素,特禽在国内的销售短时间内不会有太大的突破,扩大出口无疑是我国特禽业乃至整个养殖行业经济增长的一个亮点。那么,我国特禽出口的前景如何?方向何在?让我们听一听我国最大的特养企业、迄今我国特禽业出口创汇最多的天津燕子洼特养基地总经理王希彦的分析吧。 相似文献
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近年,特禽生产在我国不断升温,确实繁荣了一方经济,丰富了人民菜篮子,但生产背后,亦存在这方、那方原因,一定程度上阻碍了特禽业的发展。本文就目前特禽业的品种、技术、市场状况等作了简要阐述,同时探讨了特禽业的发展趋势以及今后生产的发展对策,以促进特禽业稳步发展,更好地为国民经济建设服务。 相似文献
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一、广东特禽业产业化发展现状 1．特禽产品市场不断壮大 市场的需要决定了特禽业的发展，适者生存，不适者淘汰，这是市场发展的必然规律，十几年来特禽业就是按照这规律逐步发展壮大的。在特禽养殖中，养鸽业就是在市场逐步扩大而得到发展的。随着广东经济的快速增长，市场的需求量有较大的发展，特别是亚洲金融危机后，广东的肉鸽养殖虽受一定的挫折，但很快恢复元气；1998年，广州乳鸽市场销售量首次达到甚至超过香港，年销售达到1 200万只。同样，鹧鸪、鹌鹑、山鸡等特禽的养殖也在不同程度上得到较大的发展。 2．特禽企业规模化、产业… 相似文献
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阐述了我国特禽业10多年所取得的成就及存在的问题.使行业稳定、持续发展的必要条件是建立特禽研究中心;加强对行业的管理,积极引导消费,扩大需求,培养买方市场,发展外向型特禽生产;是21世纪特禽业的任务'. 相似文献
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阐述了我国特禽业１０多年所取得的成就及存在的问题。使行业稳定、持续发展的必要条件是建立特禽研究中心；加强对行业的管理，积极引导消费，扩大需求，培养买方市场，发展外向型特禽生产，是２１世纪特禽业的任务。 相似文献
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特禽养殖概况、问题与对策■周世朗（四川省温江农业学校６１１１３０）一、特禽养殖概况近１０多年来，我国特禽养殖业发展很快，全国已有两千多家特禽饲养场，而小规模的家庭养殖就更多了。广东省是我国发展特禽业最早、最快、最多的省，目前全省饲养各种特禽达６０００... 相似文献
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该文阐述了我国特禽业十多年所取得成就及存在的问题 ;该行业稳定、持续发展须建立特禽研究中心 ,加强对该行业的管理 ,积极引导消费 ,扩大需求 ,培养买方市场 ,发展外向型特禽生产 ;对21世纪特禽业的发展做出了预测。 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