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信鸽界多年来总结出的最精辟的三字经就是“种、养、训”。“种”在前,“训”在后,“养”居中。在三字经中“养”不但起承前启后的桥梁作用,而且“种”中有“养”,“训”中也有“养”,“赛”更离不开“养”。“养”始终贯穿于培养赛鸽的各个环节,养功的好坏直接关系到赛鸽的成败。 相似文献
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从2007年起.赛鸽变得越来越难飞,特别是2009年格外难飞。无论是公棚赛还是常规赛,在天气尚好的赛况下.赛鸽在这些频繁的比赛中当日超低的归巢率令许多人深切体会到:鸽子还是那些鸽子,养鸽技巧也在不断地提高,怎么鸽子越来越不会养,或者不知道该怎么养了呢? 相似文献
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实践是检验真理的唯一标准。
自从《公棚赛的选鸽和选棚》一文在《科学养鸽》2008年第3期上发表以来,反响很大,受到了山南海北鸽友的极大关注,他们纷纷打电话询问栉膜在选鸽中的技巧。为了回报广大鸽友的信任和厚爱,我将壮着胆子以自己或给鸽友选配赛鸽送公棚获得冠军、亚军的体会, 相似文献
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每当赛季开始,总听到身边的鸽友抱怨自己的赛鸽因为患病不得不忍痛终止比赛.一年的准备也付诸东流了。养鸽者每年对赛鸽付出的辛勤劳作都是为了比赛,但是”逐年更新”的各种疾病接踵而至,使辛勤劳作没有结果。开始时鸽子只显现呼吸道病的症状.好不容易控制住了,没过几天又有鸽子发生呕吐、水便,刚收拾清满地狼藉,又有鸽子跛足、流泪,真可谓彼方唱罢此方兴。 相似文献
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鸽友们都知道,饲养信鸽最讲究“种、养、训”.而训放则是“训”的重要组成部分,训放的效果直接关乎信鸽的比赛成绩。所以,训放历来被参赛鸽友所看重。 相似文献
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实践是检验真理的唯一标准,一切事物的真伪和优劣只有通过实践检验才能得出正确的结论。总结多年养鸽的经验和教训,笔者认为赛鸽的优劣以及种鸽配对成功与否,只有通过比赛才能得到验证。赛场是检验赛鸽的试金石,而赛绩是检验赛鸽的唯一标准。 相似文献
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Repeated superovulation in calves 总被引:2,自引:0,他引:2
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试验旨在探讨激素剂量、超排间隔及重复超排次数对和牛重复超排效果的影响,为建立稳定、高效的和牛供体重复超排方案提供依据。本试验共选取63头15~18月龄的和牛供体母牛进行超排处理,其中17头和牛供体随机分成2组,分别以200、200、200 mg的FSH注射总剂量和200、220、240 mg的FSH注射总剂量进行3次重复超排,每次超排间隔30 d,研究激素剂量对和牛重复超排的影响;24头和牛供体随机分成3组,每组分别以60、45、30 d的超排间隔,每次200 mg的FSH注射总剂量进行3次重复超排,研究超排间隔对和牛重复超排的影响;22头和牛供体采用每次200 mg的FSH注射总剂量进行连续7次重复超排,每次超排间隔30 d,研究重复超排次数对和牛重复超排的影响。结果显示,采用FSH注射总剂量为200、220、240 mg获得的头均胚胎总数和头均可用胚胎数显著高于每次均为200 mg的FSH注射总剂量(P<0.05);与超排间隔60 d组相比,超排间隔45 d组获得的头均可用胚胎数显著降低(P<0.05),而超排间隔30 d组获得的头均可用胚胎数也降低,但差异不显著(P>0.05);重复超排在6次以内,获得的头均可用胚胎数无显著差异(P>0.05)。结果表明,注射FSH总剂量为200、220、240 mg连续超排3次的超排效果优于注射FSH总剂量为200、200、200 mg组;超排间隔越长,越有利于母牛生殖道的恢复,获得的可用胚胎数越多,但超排间隔30 d,也可获得良好的超排效果;高强度重复超排以30 d为超排间隔,超排5~6次为宜。 相似文献
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《Strength and Conditioning Journal》2008,61(2):182-187
We conducted a study on how Acacia sieberiana respond to repeated burning in the Kidepo National Park in northeastern Uganda. The study was conducted to understand effects of common burning regimes (early dry season, late dry season, and no burn [control]) in the area on Acacia sieberiana. The three treatments were applied for three consecutive years to 14 replicate blocks in a randomized block design. All A. sieberiana trees were number tagged and monitored for height and girth (diameter at breast height) growth. All fires were set as head-fires and attained intensity ranging between 422 and 5693 kW · m−1. Both early and late dry season burning increased the number of small (< 49 cm) A. sieberiana trees after 2 yr. Burning did not affect the growth rates. Although the number of trees < 49 cm increased after 2 yr, the mortality in this height class was also increased by the late dry season burning, and after 3 yr of consecutive burning there were no statistical treatment differences in the height class < 49 cm. Late dry season burning also led to high mortality among trees > 250 cm in the third year. Mortality attributed to elephant browsing was important in all treatments but a substantial portion of mortality could not be attributed to any particular cause. In the late burn, fire was the most important mortality factor. Thus, 2 yr of burning may be used as a tool to stimulate recruitment of A. sieberiana, but additional years of late dry season burning will increase the mortality of older trees. 相似文献
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Repeated transplacental transmission of Neospora caninum in dogs 总被引:3,自引:0,他引:3
J P Dubey A Koestner R C Piper 《Journal of the American Veterinary Medical Association》1990,197(7):857-860
Four litters of German Shorthaired Pointers from one owner developed a toxoplasmosis-like illness. According to the records, 29 of 39 dogs had hind limb paralysis. Six dogs from 2 litters were necropsied and had generalized encephalomyelitis. Tachyzoites and tissue cysts of Neospora caninum were found in the brain and spinal cord of each dog. Lesions were found in the eyes, extraocular muscles, or both in all of the dogs, and N caninum was detected microscopically in the eyes (retina and choroid in 1 dog), extraocular muscles, or both in 5 of the 6 dogs. Ocular lesions consisted of focal retinitis, choroiditis, mild nonspecific iridocyclitis, and myositis of extraocular muscles. Organisms stained with anti-N caninum serum, but not with anti-Toxoplasma gondii serum in an immunohistochemical test, except in 1 dog. In one dog, aged thick-walled N caninum tissue cysts reacted mildly with anti-T gondii serum. 相似文献
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Davide Pravettoni Nicola Morandi Marco Rondena Pietro Riccaboni Davide D. Zani Massimiliano Scandella Angelo G. Belloli 《The Canadian veterinary journal. La revue veterinaire canadienne》2009,50(3):287-290
This paper reports the clinical findings, diagnostic imaging, surgical management, and necropsy of an unusual case of jejuno-jejunal intussusception in a calf that was diagnosed with the use of ultrasonography, and treated surgically by resection and end-to-end anastomosis. The calf fatally relapsed 8 d after laparotomy. Necropsy and histology revealed enteritis and myenteric ganglionitis. 相似文献
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实验探讨了重复超排对育成牛繁殖力的影响。结果表明:(1)经1~3次重复超排后14~16月龄育成荷斯坦牛自然发情后人工授精(3次以内),超排1次组、超排2次组和超排3次组妊娠率分别为96.25%、91.67%和95.29%,与对照组(未超排组)妊娠率为94.74%均无显著差异(P>0.05)(;2)超排处理后恢复期为5~10d组的妊娠率为50.0%,低于恢复期为30~40d组66.67%和恢复60~80d组60.47%的移植妊娠率,但差异不显著(P>0.05);(3)不同超排次数胚胎移植妊娠率分别为超排1~2次组63.27%、3~4次组61.11%、5~6次组57.14%,差异不显著(P>0.05)。重复超排后奶牛胚胎移植妊娠率随超排次数的增加有下降趋势,但与对照组(未超排组)62.50%的妊娠率无显著差异。 相似文献