共查询到20条相似文献，搜索用时 62 毫秒
1.
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
2.
3.
将临产前４５天的妊娠黑白花母牛５０头分五组，各组均喂药ＤＭ组成一样的日粮（含硒０．０４９５ｐｐｍ）。试Ⅰ、Ⅱ组每ｋｇ日粮ＤＭ补硒０．１、０．３ｍｇ，以亚硒酸钠形成拌入混合精料中，试Ⅲ组每牛投入瘤胃一粒白银产的硒弹丸（３０ｇ，含硒２４６４６ｕｇ／ｇ），试用Ⅳ组每牛每天添加高硒菜籽饼１５０ｇ（含硒８．９２ｕｇ／ｇ），对照组不补硒，结果表明，各试验组牛平均血本含量（ｐｐｍ）依次为０．１１５，０．１５１７ 相似文献
4.
奶牛饲料中添加产速康后，试验组奶牛产奶量增加１．６ｋｇ／ｄ，提高了６．７９％，与对照组差异显著（Ｐ〈０．０５）；围产期的奶牛和犊牛的发病率降低，发情期正常，生产性能提高。血液测试，两驵全血铜、硒、血清蛋白结合碘含量差异显著（Ｐ〈０．０５）。 相似文献
5.
本试验采用２５头６０～１０ｋｇ社长大肥育猪，随机分为５组、分别饲喂基础日粮添加０．５％（Ｉ组）、１％（Ⅱ）、２％（Ⅲ）、３％（Ⅳ）和４％（Ⅴ）的实用矿物添加剂，持续饲喂２７天，观察超量添加矿物添加剂对其生产性能及组织中微量元素含量的影响。结果表明，添加高于１％的本试验添加剂，使猪的日粮增重和日采食量明显降低，而料肉比明显升高；另外，使猪各组织钻含量明显升高（Ｐ＜０．０５），肝、脾硒含量明显升高（Ｐ＜０．０５），而肌肉、肾、心脏硒含量则明显降低（Ｐ＜０．０５），即机体内各组织中硒含量的分布发生改变。 相似文献
6.
7.
应用硒弹丸防治绵羊缺硒病的试验研究 总被引：2，自引：0，他引：2
对严重缺硒地区绵羊投硒弹后２个月，血硒含量达到正常水平，５个月达到高峰，１２个月后虽降到临界水平以下，但还是显著高于对照组（Ｐ〈０．０１）。在投硒弹后１～４个月，试验组和对照组间体重差异不明显（Ｐ〉０．０５），从第５个月开始，试验组增重极显著高于对照组（Ｐ〈０．０１），从第９个月后虽逐渐缩小，但至第１２个月试验组总增重明显高于对照组（Ｐ〈０．０５）。通过对１４９００只缺硒病羊应用硒弹后，羔羊白肌病完全得到控制，春乏死亡率降低６．５５个百分点，流产率降低８．０４个百分点，羔羊繁殖成活率提高２３．０９个百分点。试验羊比对照羊平均多增重３．０６ｋｇ，多产乱０．１１ｋｇ。研究表明，冬春枯草季节是绵羊缺硒病高发季节，选择每年１０月份投硒弹，在来年春乏和育羔阶段，羊血硒水平即达到高峰，从而发挥明显的补硒作用，完全能控制羔羊 相似文献
8.
9.
采用水浴湿法消化，以Ｐd（ＮＯ３）２－ＴritonＸ－１００作为基体改进剂，应用Ｚeeman石墨炉原子吸收法测定了肝组织硒含量。试验结果表明，肝组织经水浴湿法消化测得的硒 含量与消化测定结果基本一致（Ｐ〉０．０５），相对标准偏差为１．１１％，回收率为９５．８０％～１００．４０％。石墨炉原子吸收法测定硒的检测限为５．０ug/Ｌ。 相似文献
10.
增奶灵在奶牛生产中的应用 总被引：2，自引：0，他引：2
用不 同添 加 剂量 的增 奶 灵饲 喂 ３６头 泌 乳中 期 的荷 斯 坦 奶 牛，其 中对 照 组 １２头 ，试 验 Ａ 组 、Ｂ组 和 Ｃ 组各 ８头 牛 。试验 各组 牛 在基 础日 粮 中分 别添 加 占精 料 量 的 ０．０５％、０．１％和 ０．１５％的 增 奶 灵 ，经４７ｄ 的 饲 喂试 验，结果 发 现，和 对 照 组 比试 验 Ａ 组 牛产 奶 量 增 加 了 ４．５％，试 验 Ｂ 组 牛 增 加 ７．０％，试 验 Ｃ组 牛 增加 １３．６％； 乳 汁 中 体 细 胞 数 显 著 Ｐ＜０．０５下降 ；各 组 受 试 牛 的 乳 脂 率 没 有 变 化 ；此 外 ，试 验 组 牛蹄 的质 量明 显 改善 。 相似文献
11.
Rassnick KM Gieger TL Williams LE Ruslander DM Northrup NC Kristal O Myers NC Moore AS 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2001,15(3):196-199
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.
Davis MS Willard MD Nelson SL Mandsager RE McKiernan BS Mansell JK Lehenbauer TW 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2003,17(3):311-314
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.
Furosemide continuous rate infusion in the horse: evaluation of enhanced efficacy and reduced side effects 总被引：1，自引：0，他引：1
Johansson AM Gardner SY Levine JF Papich MG LaFevers DH Fuquay LR Reagan VH Atkins CE 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2003,17(6):887-895
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.
Tropical Animal Health and Production - 相似文献
15.
Waruiru RM Thamsborg SM Nansen P Kyvsgaard NC Bogh HO Munyua WK Gathuma JM 《Tropical animal health and production》2001,33(3):173-187
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
16.
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
17.
H Hayashi T Yoshimura J Y Chen 《Comparative immunology, microbiology and infectious diseases》1985,8(2):73-87
Our particular attention in this article was given to natural mediators for macrophages isolated from the sites of tissue injury. A number of chemotactic factors, which may satisfy many criteria making them acceptable as inflammatory leucocyte chemotactic factors, has been separated. Among them, our laboratory has isolated three macrophage (monocyte) chemotactic factors (MCF-a, -b and -c). Their purification, characterization and functional specificity are discussed. 相似文献
18.
19.
Evaluation of biohydrogenation rate of canola vs. soya bean seeds as unsaturated fatty acids sources for ruminants in situ 
下载免费PDF全文
下载免费PDF全文 S. Pashaei T. Ghoorchi A. Yamchi 《Journal of animal physiology and animal nutrition》2016,100(2):211-216
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
20.
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