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1.
甘肃新生羔羊腹泻症的矿物元素检测   总被引：1，自引：1，他引：0  
探讨甘肃省６个地区７日龄内新生羔羊体内的矿物元素水平与新生羔羊腹泻症的关系。羔羊血浆Ｚｎ含量为１２×１０－３ｍｍｏｌ／ｌ～２３×１０－３ｍｍｏｌ／ｌ,Ｓｅ含量为０．３１×１０－４ｍｍｏｌ／ｌ～２．９２×１０－４ｍｍｏｌ／ｌ,呈严重缺乏。  相似文献   

2.
雏鸭（0—3周）日粮锰适宜水平的研究   总被引：4，自引：0，他引：4  
１６８只１日龄樱桃谷肉鸭随机分成６组,在玉米—豆粕型日粮（含Ｍｎ的质量分数为２１×１０－６）中分别添加０×１０－６、３０×１０－６、６０×１０－６、９０×１０－６、１２０×１０－６、１５０×１０－６锰（分析纯ＭｎＳＯ４·Ｈ２Ｏ）,试验期３周,研究雏鸭日粮适宜补锰水平。结果为饲粮锰水平不影响雏鸭体增重、日采食量和饲料转化率（Ｐ＞００５）;胫骨和趾骨锰浓度随饲粮锰水平增加呈线性上升（Ｐ＜００１）,肝和心组织锰浓度与饲粮锰水平呈二次曲线模式（Ｐ＜００１）。当日粮Ｍｎ水平为１１８３×１０－６和１１０×１０－６时,肝和心组织锰水平最高。综合试验结果考虑,雏鸭饲粮锰适宜水平为１１０×１０－６。  相似文献   

3.
钴在牧草和饲料生产中的作用   总被引：4，自引：0，他引：4  
钴是动植物有益的必需微量元素之一。具有一定的生理作用。研究牧草和饲料中钴的特点和畜禽营养的关系,在生产上具有重要意义。１．钴在动植物营养中的作用钴在体内含量为３０～６０μｇ／ｋｇ活重或者是０．３×１０－５～０．６×１０－５％。主要存在于肝脏、肾脏、脾...  相似文献   

4.
为了克服药效下降及中毒现象,预防鸡Ｅ．ｔｅｎｅｌａ,采用联合用药的方法,药物剂量为马杜拉霉素２．５×１０－６＋地克珠利０．５×１０－６结果,联合用药组抗球虫指数（ＡＣＩ）为１９４．１,高于单独用药组（马杜拉霉素５×１０－６的ＡＣＩ１３７．３,地克珠利１×１０－６的ＡＣＩ１８６．５）。表明联合用药是一种值得探索的有效延长药物效用期的方法。  相似文献   

5.
海藻作饲料添加剂饲喂产蛋鸡的效果   总被引：2，自引：0，他引：2  
用６００只产蛋鸡分四组进行了６７ｄ饲养实验,考察海藻粉（ＳＭ）的效果。结果表明：ＳＭ组试鸡产蛋率与商品添加剂组和Ｋ１组比差异显著（Ｐ＜０．０５）,与未加ＳＭ组比差异不显著（Ｐ＞０．０５）。蛋重比其他三组高０．４～１．５ｇ／枚,饲料转化率高６．４％、７．６％和低０．７６％;试期４～２７ｄ,ＳＭ组蛋黄的碘含量由９．４ｕｇ／ｇ增加到６６．８ｕｇ／ｇ（鲜样）。至２７ｄ达到高值,比未加ＳＭ和ＫＩ组高达８．４和５．２倍。蛋白含碘亦由０增加到８．７ｕｇ／ｇ;蛋黄色素变化随着饲养期延长而加深,至２７ｄ达到９个评分等级,比未加ＳＭ和ＫＩ组高２．７和１．５个等级;此外还发现ＳＭ中的碘比ＫＩ中的碘更稳定,两种日粮同时保存５２ｄ,前者损失５９％（碘由８０．４×１０－６降至３２．７×１０－６）,后者损失７６．５４％（碘由８０×１０－６降至１８．７７×１０－６）。  相似文献   

6.
肉毒碱,甜菜碱,吡啶羧酸铬对育肥肉猪瘦肉率的影响   总被引：1，自引：0，他引：1  
本试验旨在探测肉毒碱、甜菜碱、吡啶羧酸铬对育肥肉猪胴体瘦肉率的影响，为在生产上应用提供依据。试验结果表明在４５ｋｇ体重以上的育肥猪料中每ｔ添加０２％甜菜碱、１００×１０６肉毒碱、２００×１０－９吡啶羧酸铬、０２％甜菜碱＋２００×１０－９吡啶羧酸铬、１００×１０－６肉毒碱＋２００×１０－９吡啶羧酸铬，均未起到改善胴体瘦肉率的作用。  相似文献   

7.
１喷布微量元素及微肥,提高雌花比例龙眼雌雄蕊形成的２～３月间,叶面喷布１０００倍液硫酸锌、硼砂和０．２％尿素混合液,或喷布１０００倍液硫酸铜与０．５％高效复合肥混合液,可明显提高雌花比例。２适时适量运用植物生长调节剂,防止幼果败育谢花后即喷布６－苄基腺嘌呤３５×１０－６,７～１０天后喷布２,４－Ｄ ５ × １０－６～１０ × １０－６,花后１５～２０天喷布２０×１０－６～２５× １０－６防落素, ２５天后喷布 ２５×１０－６“九二Ｏ”液一次。３及时补充营养,以防落果花前施足花前肥,按结果树大小每树可挂果…  相似文献   

8.
锥-46的耕牛血药浓度反相HPLC测定方法探索   总被引：1，自引：0，他引：1  
用惠普ＨＰ１０５０四元泵、ＨＰ１０４０Ｍ二极管阵列检测器和色谱柱ＥｃｏｎｏｓｐｈｅｒｅＣ（１８）（２５０×４．６ｍｍ，５μ）探索了锥－４６的耕牛血药浓度测定条件。检测波长２５２±２ｎｍ，参比波长５５０±２ｎｍ。流动相为甲醇：乙腈：重蒸水＝２０：２５：５５（Ｖ／Ｖ），每３００ｍｌ加入二乙胺１０００μｌ，用磷酸调节至ｐＨ３．５，流速０．６ｍｌ／分。血浆中的锥－４６用磷酸酸化至ｐＨ２．４的甲醇溶液提取，平均提取效率达９９．３３±２．２８％。提取物在６０℃下减压浓缩。平均回收率为９９．４６±６．０７％。本法最低检测浓度为０．１μｇ／ｍｌ。在锥－４６浓度为０．１～１０μｇ／ｍｌ范围内线性良好（相关系数ｒ＝０．９９９９，峰面积＝０．６９２８＋１．５８１×锥－４６ｎｇ数）。锥－４６基本上能与血浆中的杂质成分完全分离。已应用于耕牛体锥－４６的药物代谢动力学的研究。  相似文献   

9.
对两例银黑狐雌性生殖器官形态的观察，卵巢呈两端大小一样的蚕豆形，长１．１－１．３ｃｍ，宽０．７－０．８ｃｍ，厚０．５－０．７ｃｍ。两侧输卵管全长３．０－４．０ｃｍ，有３－１０个弯曲，输卵管有系膜固定。子宫角呈圆筒形，平均长度６．４ｃｍ，外壁直径０．４ｃｍ。子宫体亦为圆筒状，比子宫角粗，长１．４－１．５ｃｍ，直径０．５－０．６ｃｍ，平均体与两子宫角之间形成“丫”状，子宫角内未发现子宫阜。阴道呈扁圆筒  相似文献   

10.
鸡传染性法氏囊病（ＩＢＤ）Ｖｅｒｏ细胞弱毒疫苗（ＶＣＶ９０１）病毒滴度为１０￣（７．３）～１０￣（８．３）ＴＣＩＤ＿（５０）／０．０５ｍｌ．疫苗经皮下、肌内、点眼－滴鼻和口服途径免疫接种雏鸡，均表现出良好的免疫原性。皮下接种１４日龄雏鸡，免疫后８、１４和２１天攻毒，保护数分别为２／６、６／６５／６，如在３５日龄再加强免疫一次，于二免后７０天和１１５天攻毒．其保护数分别为６／６和５／６．疫苗的最小免疫剂量为１０￣５ＴＣＩＤ＿（５０）／只，用１０、５０和１００培免疫剂量免疫雏鸡，临床表现均安全，不影响雏鸡增重．经易感雏鸡连传５代，疫苗毒力不返强．温苗在－２０℃～－２５℃至少保存一年，在０℃可保存一周，疫苗对鸡无致瘤性．  相似文献   

11.
1-(2-Chloroethyl)3-cyclohexyl-1-nitrosourea (CCNU) is an alkylating agent in the nitrosourea subclass. A prospective evaluation of CCNU was done to determine the maximally tolerated dosage of CCNU in tumor-bearing cats. Response data were obtained when available. Twenty-five cats were treated with CCNU at a dosage of 50-60 mg/m3 body surface area. Complete hematologic data were available for 13 cats. Neutropenia was the acute dose-limiting toxicity. The median neutrophil count at the nadir was 1,000 cells/microL (mean, 2,433 cells/microL; range, 0-9,694 cells/microL). The time of neutrophil nadir was variable, occurring 7-28 days after treatment, and counts sometimes did not return to normal for up to 14 days after the nadir. Based on these findings, a 6-week dosing interval and weekly hematologic monitoring after the 1st treatment with CCNU are recommended. The nadir of the platelet count may occur 14-21 days after treatment. The median platelet count at the nadir was 43,500 cells/microL. No gastrointestinal, renal, or hepatic toxicities were observed after a single CCNU treatment, and additional studies to evaluate the potential for cumulative toxicity should be performed. Five cats with lymphoma and 1 cat with mast cell tumor had measurable responses to CCNU. Phase II studies to evaluate antitumor activity should be completed with a dosing regimen of 50-60 mg/m3 every 6 weeks.  相似文献   

12.
Human and equine athletes are reported to have a high prevalence of gastric disease, and anecdotal evidence suggests a similar phenomenon applies to racing sled dogs. To investigate the prevalence of gastric disease in racing sled dogs, we conducted 2 gastroscopy studies on dogs competing in the annual Iditarod Sled Dog Race. A pilot study of dogs that were either dropped from the 2000 Iditarod Sled Dog Race because of illness or that finished the race indicated that, approximately 5 days after competing, 10 of 28 dogs (35%) had endoscopic evidence of gastric ulceration, erosion, or hemorrhage. The next year, an endoscopic study of 73 dogs participating in the 2001 Iditarod race was performed in order to evaluate a larger population of dogs. Data from 70 of these dogs could be used; 34 (48.5%) had ulceration, erosion, gastric hemorrhage, or some combination of these findings. When this group of 70 dogs was compared retrospectively to a control group of 87 dogs presented to the Texas A&M University (TAMU) Veterinary Medical Teaching Hospital, the Iditarod sled dogs had a significantly higher prevalence (P = .049) of gastric lesions. These findings suggest that, similar to athletes of other species, elite canine athletes have an increased prevalence of gastric disease compared to the canine population at large.  相似文献   

13.
Continuous rate infusion (CRI) of furosemide in humans is considered superior to intermittent administration (IA). This study examined whether furosemide CRI, compared with IA, would increase diuretic efficacy with decreased fluid and electrolyte fluctuations and activation of the renin-angiotensin-aldosterone system (RAAS) in the horse. Five mares were used in a crossover-design study. During a 24-hour period, each horse received a total of 3 mg/kg furosemide by either CRI (0.12 mg/kg/h preceded by a loading dose of 0.12 mg/kg IV) or IA (1 mg/kg IV q8h). There was not a statistically significant difference in urine volume over 24 hours between methods; however, urine volume was significantly greater after CRI compared with IA during the first 8 hours ([median 25th percentile, 75th percentile]: 9.6 L [8.9, 14.4] for CRI versus 5.9 L [5.3, 6.0] for IA). CRI produced a more uniform urine flow, decreased fluctuations in plasma volume, and suppressed renal concentrating ability throughout the infusion period. Potassium, Ca, and Cl excretion was greater during CRI than IA (1,133 mmol [1.110, 1,229] versus 764 mmol [709, 904], 102.7 mmol [96.0, 117.2] versus 73.3 mmol [65.0, 73.5], and 1,776 mmol [1,657, 2.378] versus 1,596 mmol [1,457, 1,767], respectively). Elimination half-lives of furosemide were 1.35 and 0.47 hours for CRI and IA, respectively. The area under the excretion rate curve was 1,285.7 and 184.2 mL x mg/mL for CRI and IA, respectively. Furosemide CRI (0.12 mg/kg/h) for 8 hours, preceded by a loading dose (0.12 mg/kg), is recommended when profound diuresis is needed acutely in horses.  相似文献   

14.
The epidemiology of H. placei and of other gastrointestinal nematodes in yearling dairy cattle was examined on two farms in Kiambu District, central Kenya during each of 13 one-month periods from April 1993 to April 1994. On each farm, 32 newly weaned dairy calves were given a single dose of albendazole and then placed on experimental pastures. Twelve of the animals were designated for bi-monthly slaughter (n = 2) and analysis of worm population characteristics and 20 were designated for blood and faecal collection and for weighing. Two parasite-free tracer calves were grazed alongside the weaner calves each month throughout the study period and were also slaughtered for analysis of worm populations. Faecal egg counts, haematological and serum pepsinogen determinations, herbage larval counts, and animal live weight changes were recorded monthly. The study revealed that Haemonchus placei, Trichostrongylus axei, Cooperia spp. and Oesophagostomum radiatum were responsible for parasitic gastroenteritis and that H. placei was the predominant nematode present in the young cattle on both farms. Faecal egg counts from resident cattle and necropsy worm counts revealed that pasture larval levels were directly related to the amount of rainfall. The total worm burdens in the animals were highest during the rainy season (March–June and October–December) and lowest during the dry seasons (July–September and January–February). The very low recovery of immature larvae of H. placei from the tracer calves indicated that arrested development is not a feature of the life cycle of this parasite in central Kenya. The maintenance of the parasite population depended on continuous cycling of infection between the host and the pasture. The agroclimatic conditions of the study area were such that, in general, favourable weather conditions for the development and survival of the free-living stages of gastrointestinal nematodes existed all year round.  相似文献   

15.
The occurrence of ectoparasites in sheep flocks is frequently reported but seldom quantified. Sheep production used to be a predominantly family activity in the state of Sa~o Paulo (Brazil), but it began to become a commercial activity in the past decade. Thus, information about the ectoparasites existing in sheep flocks has become necessary. The present data were obtained by means of questionnaires sent to all sheep breeders belonging to the `Associaça~o Paulista de Criadores de Ovinos' (ASPACO; Sa~o Paulo State Association of Sheep Breeders). Response reliability was tested by means of random visits paid to 10.6% of the respondents. Most of the properties (89.5%) reported the presence of one or more ectoparasites. Screw-worm (Cochliomyia hominivorax) was the most frequent ectoparasite (72.5%), followed by bot fly larvae (Dermatobia hominis, 45.0%), ticks (Amblyomma cajennense) and Boophilus microplus, 31.3%) and finally lice (Damalinia ovis, 13.8%). Combined infestations also occurred, the most common one being screw-worm with bot fly larvae (36.0%) followed by bot fly larvae with ticks (13.9%), screw-worm with ticks (9.3%), bot fly larvae with lice (6.9%), and ticks with lice (5.0%). The most common triple combination was screw-worm, bot fly larvae and ticks (12.8%). Breeds raised for meat or wool were attacked by bot fly larvae and ticks more often than other breeds. Lice were only absent from animals of indigenous breeds. The relationships among these ectoparasites are discussed in terms of sheep breeds, flock size, seasonality and the ectoparasitic combinations on the host.  相似文献   

16.
Comparison of different tests to diagnose feline infectious peritonitis   总被引：1，自引：0，他引：1  
  相似文献   

17.
An experiment was conducted to study disappearance of C14 to C18 fatty acids, lag times and biohydrogenation (BH) rates of C18 fatty acids of ground soya bean and canola seeds in situ. Three ruminally fistulated Dallagh sheep were used to determine ruminal BH of unsaturated fatty acids (UFAs). Differences in the disappearance of fatty acids through the bags and lag times were observed between the oilseeds. We saw that the longer the incubation time of the oilseeds in the rumen, the lower the content of C18:2 and C18:3. Significantly higher lag times for both C18:2 and C18:3 were observed in ground canola compared to ground soya bean. BH rates of C18:2 and C18:3 fatty acids in soya bean were three times higher than those of canola. These results suggest that the fatty acid profile of fat source can affect the BH of UFAs by rumen micro‐organisms. So that UFAs of canola had higher ability to escape from ruminal BH. It seems that fatty acid profile of ruminant products is more affected by canola seed compared to soya bean seed.  相似文献   

18.
Serum biochemical values and the wet weight to dry weight ratios of tissues were determined in yaks in Shandan county of Gansu province. The liver, kidney, heart and muscle contents of seven elements in yaks were also analysed. Most serum biochemical values were similar to those of cattle, camels and sheep, but the calcium concentration was considerably above the normal range for other ruminants. The liver contained the highest concentrations of copper, manganese and cobalt and the kidney of selenium, iron and calcium.Abbreviations Alb albumin - ALT alanine aminotransferase - AST aspartate aminotransferase - BUN blood urea nitrogen - Chol cholesterol - Glob globulin - -GT -glutamyl transpeptidase - IP inorganic phosphorus - TP total protein  相似文献   

19.
正We are pleased to publish the second special issue on avian brood parasitism and to be responsible guest editors for the two special issues of Chinese Birds (Vol. 3, No. 4, 2012 and Vol. 4, No. 1, 2013), entitled "Avian Brood Parasitism - A Growing Research Area in Behavioral Ecology". The first issue was published in December 2012. The goal of the two special issues is to publish accumulated knowledge and some of the recent developments in  相似文献   

20.
Tropical Animal Health and Production -  相似文献   

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