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１９９７年１２月～１９９８年４月于黑龙江省哈尔滨郊区某鸵鸟场对１２只１－２１０日龄的非洲黑颈鸵鸟，结合本地气候特点进行了耐寒性定向培育试验，取得了较好的效果，试验期鸵鸟成活率达１００％，１日龄雏鸟在３２℃育雏条件下，生长发育良好，５－６月龄鸵鸟培育后能逐渐适当当地－３０℃左右的饲养环境，鸵鸟各日龄体重均达到正常标准，试验结果为鸵鸟在我国北方地区耐寒性培育工作提供了技术参考和例证。 相似文献
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兔巴氏杆菌病是６月龄以下幼兔死亡的主要原因。２００１年６月，我县一种兔场应用市售兔瘟、巴氏杆菌、魏氏梭菌三联苗免疫后，却复发兔巴氏杆菌病，报告如下：１发病情况 ２０００年６月下旬，我县尖角乡刘湾村一兔场，用从某私营兽药店买来的兔瘟、巴氏杆菌、魏氏梭菌三联苗，给存栏的４００多只金丝长毛兔全部做了免疫注射（１个免疫剂量／只）。注射后１４ｄ左右，兔群中３～４月龄幼兔开始陆续发病死亡。到２０００年８月７日，发病免２０８只，死亡１９８只，发病率５０．２％，病死率９５．２％。发病期间应用磺胺类药、痢特灵、氟… 相似文献
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温州大地鸵鸟养殖开发有限公司于１９９６年８月陆续引进一批４月龄鸵鸟及２批鸵鸟种蛋。１９９７年２月３日早晨发现死亡１只,２月６日又发现１只离群拒食,通过对死鸟解剖、细菌学检查、临床症状分析确诊为鸵鸟前胃阻塞。１ 临床症状及病理变化病鸟离群、精神沉郁、羽毛松乱、食欲下降,继而拒食,粪量减少。临死前排出少量茶色尿液,口腔流出黄色粘液。病理变化为头部皮下结缔组织水肿,腺胃粘膜脱落,出血,腺胃和肌胃间有出血带。肌胃内砂、石、饲料重达３ｋｇ,最大的石子重量在７０ｇ以上,小的也有１０ｇ左右。还有一长８ｃｍ,宽… 相似文献
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喹乙醇是一种畜禽促长剂，并且具有良好的抗菌、抗球虫作用。现将在鸵鸟养殖中的应用介绍如下。１ 防治疾病用喹乙醇治疗鸵鸟细菌性腹泻效果较好。与速服宁、百病消等药物相比具有价格低、疗效可靠等特点。１９９８年１１月１０日，２只４月龄鸵鸟发生腹泻（棕红色粪便），初步诊断为细菌性肠炎，应用硫酸庆大霉素８万ＩＵ，黄莲素２ｍＬ，复合维生素Ｂ注射液２ｍＬ。１次肌肉注射，并口服痢特灵。每天２次，连用３ｄ，病鸟康复。２ｄ后复发，应用喹乙醇（含量为９８％）逐只投服，每只每次２００ｍｇ，每天１次。２ｄ后腹泻停止，又喂１ｄ… 相似文献
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１９９８年４月，湖南某鸵鸟场幼鸟突然发生眼结膜肿胀继而迅速死亡为特征的疾病，发病率６２．５％，致死率达２７．５％，给该场造成巨大经济损失。一．发病情况该场于１９９６年建场，集种鸟繁育、孵化育雏、青年培养为一体的综合性养殖场。１９９８年４月，幼鸵鸟栏内有一只鸟突然发病，厌食、拉稀，但精神尚好，隔日晚上死亡。此后一个月内先后有２５只鸟发病，发病率６２．５％，死亡１１只，死亡率达４４％。最小的２月龄，最大的７月龄，以３－４月龄最多，病程一般４－５天，最长达１５天。二．临诊症状病鸟首先出现食欲下降，离群… 相似文献
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１９９９年７月 ,郑州市某鸵鸟场的雏鸵鸟发生一种以发病急、死亡率高为特征的传染病 ,经流行病学调查、临床检验、病理剖检及实验室检查 ,诊断为魏氏梭菌病。现报告如下。１发病情况该场建于１９９７年 ,养殖鸵鸟３００多只 ,１９９９年７月２３日 ,该场１５日龄的雏鸵鸟开始发病 ,３～４天后开始死亡 ,一天死鸵鸟少则１～２只 ,多则达６～９只 ,虽经青霉素、链霉素、卡那霉素、磺胺类药物等进行治疗 ,但未见成效。２症状该病特点是发病急、死亡快。病鸵鸟食欲减退、精神萎顿、羽毛蓬乱、体温升高、离群、喜卧 ,且大便干燥 ,病的后期有的挣… 相似文献
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《饲料工业》2019,(18):54-58
应用电感耦合等离子-质谱技术(ICP-MS),建立饲料中钠、镁、铬、锰、铁、铜、锌、砷、硒、镉和铅等元素的测定方法。对饲料样品的前处理方法、仪器工作参数和11种元素标准曲线进行优化;并以加标回收、分析方法比对和重复测试说明方法的准确性和精密性。方法在0～1 000 ng/ml范围内线性良好,仪器检出限为0.557 7～5.072 ng/ml,具有良好的精密度,其回收率在88.1%～104.4%之间,相对标准偏差小于5.0%。同时与原子吸收和原子荧光方法进行比对,测定结果相近。所建立的方法简单、快速,可替代原子吸收和原子荧光方法测定饲料中的11种金属元素,为饲料的质量控制提供理想的元素分析方法。 相似文献
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In experiment 1, 6 pregnant mares received a concentrate that contained a trace mineral premix that provided 14.3 mg Cu, 40 mg Zn, 28 mg Fe, 28 mg Mn, 0.08 mg Co, 0.16 mg I, and 0.16 mg Se/kg concentrate (group A). Seven mares received the same concentrate plus 502 mg Zn and 127 mg Cu once daily (group B). No differences (P > .05) in foal growth data, or Cu, Zn, and Fe concentrations of mare milk, mare serum, or foal serum were observed. In experiment 2, 6 pregnant mares received the same concentrate as group A (group C), and 8 mares received the same concentrate fortified with 4× the trace mineral premix (group D). Group C mares had higher serum Zn concentration at 1 day (P < 0.01) and 56 days (P < 0.04). Group C mares had higher milk Fe concentration at 28 days (P < .01), and group D mares had higher milk Cu concentration at 56 days (P < .01). Group C foals had higher serum Cu concentration at 14 days (P < .03). The results from this study provide no evidence to indicate that supplementing late gestating and lactating mares with higher dietary trace mineral levels than those recommended currently by NRC has any influence on foal growth and development, or on the Cu, Zn, and Fe concentrations of the mare milk, mare serum, or foal serum. 相似文献
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Breed differences for weight (CW), height (CH), and condition score (CS) were estimated from records (n = 12,188) of 2- to 6-yr-old cows (n = 744) from Cycle IV of the U.S. Meat Animal Research Center's Germplasm Evaluation (GPE) Program. Cows were produced from mating Angus and Hereford dams to Angus, Hereford, Charolais, Shorthorn, Galloway, Longhorn, Nellore, Piedmontese, and Salers sires. Samples of Angus and Hereford sires were 1) reference sires born from 1962 through 1970 and 2) 1980s sires born in 1980 through 1987. The mixed model included cow age, season of measurement and their interactions, year of birth, pregnancy-lactation code (PL), and breedgroup as fixed effects for CW and CS. Analyses of weight adjusted for condition score included CS as a linear covariate. The model for CH excluded PL. Random effects were additive genetic and permanent environmental effects associated with the cow. Differences among breed groups were significant (P < 0.05) for all traits and were maintained through maturity with few interchanges in ranking. The order of F1 cows for weight was as follows: Charolais (506 to 635 kg for different ages), Shorthorn and Salers, reciprocal Hereford-Angus (HA) with 1980s sires, Nellore, HA with reference sires, Galloway, Piedmontese, and Longhorn (412 to 525 kg for different ages). Order for height was as follows: Nellore (136 to 140 cm), Charolais, Shorthorn, Salers, HA with 1980s sires, Piedmontese, Longhorn, Galloway and HA with reference sires (126 to 128 cm). Hereford and Angus cows with reference sires were generally lighter than those with 1980s sires. In general, breed differences for height followed those for weight except that F1 Nellore cows were tallest, which may in part be due to Bos taurus-Bos indicus heterosis for size. 相似文献
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液相色谱-串联质谱法测定动物尿液中11种β-受体激动剂残留量的不确定度评估 总被引：1，自引：1，他引：0
采用液相色谱-串联质谱法测定动物尿液中11种β-受体激动剂残留量,对标准溶液、体积、质谱峰面积、浓缩过程及回收率等测定不确定度因素进行了分析,通过评定各不确定度分量及标准不确定度,得出11种β-受体激动剂的扩展不确定度在0.7 ～ 1.1 ng/mL范围内.由各因素对合成不确定度的贡献比分析可知,影响较大的因素为试验回收率及标准溶液浓度. 相似文献