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1.
《黑龙江畜牧兽医》2020,(13)
为了探讨复方维生素纳米乳对海兰褐蛋鸡产蛋后期生长性能和蛋品质的影响,试验选取56周龄健康海兰褐蛋鸡320只,随机分为2组,每组8个重复,每个重复20只鸡,对照组饲喂基础日粮,试验组在基础日粮中添加0.4 mL/kg的复方维生素纳米乳,试验为期8周,分别测定了海兰褐蛋鸡产蛋后期的生产性能和蛋品质。结果表明:试验组鸡产蛋率、平均蛋重显著高于对照组(P0.05),砂皮蛋比例极显著低于对照组(P0.01)。试验组蛋形指数、蛋壳强度、蛋黄比例、哈夫单位显著高于对照组(P0.05);蛋壳重、蛋黄重、蛋黄颜色、蛋白高度极显著高于对照组(P0.01);蛋白比例极显著低于对照组(P0.01);蛋壳厚度、蛋白重无显著差异(P0.05)。说明复方维生素纳米乳可显著提高海兰褐蛋鸡产蛋后期生产性能,并对改善海兰褐蛋鸡蛋品质有较好的作用。 相似文献
2.
本试验旨在研究蛋鸡产蛋后期使用博落回散对其生产性能的影响。试验采用单因子随机分组设计,选取8 000只60周龄的产蛋后期罗曼粉壳蛋鸡,随机分为2个组,每组4个重复,每个重复1 000只,正试期12周。本试验采用玉米-豆粕型粉状日粮,试验组在对照组日粮基础上添加300 mg/kg博落回散（有效成分含量0.375%）。结果表明：蛋鸡产蛋后期日粮中添加300 mg/kg博落回散,产蛋率显著提高3.99%(P<0.05),料蛋比、破蛋率及死亡率分别显著下降3.50%、22.74%和32.10%(P<0.05);在蛋壳质量等级方面,一级和二级蛋壳鸡蛋分别显著提高30.34%、24.60%(P<0.05),三级蛋壳鸡蛋极显著降低37.03%(P<0.01)。由此可见,在产蛋后期日粮中添加300 mg/kg的博落回散能有效改善蛋鸡生产性能,提升蛋壳质量。 相似文献
3.
文章旨在研究日粮中不同梯度维生素E添加水平对蛋鸡产蛋后期产蛋性能和蛋品质的影响。试验选择60周龄罗曼白壳商品蛋鸡300羽,试验随机分为5组,添加水平分别为0(对照组),30、60、120、240 mg/kg,每组6个重复,每个重复10羽鸡,预试期1周,正试期8周。结果表明:与对照组相比,蛋鸡产蛋后期日粮中添加120 mg/kg的维生素E可显著提高蛋鸡产蛋后期产蛋性能(P<0.05);与对照组相比,蛋鸡产蛋后期日粮中添加120 mg/kg的维生素E可显著提高蛋壳硬度、蛋壳相对重、蛋黄相对重以及蛋黄颜色(P<0.05),蛋黄总胆固醇含量极显著降低(P<0.01)。综上所述,在蛋鸡产蛋后期日粮中添加120 mg/kg的维生素E可显著改善其产蛋性能和蛋品质。 相似文献
4.
《中国畜牧兽医》2020,(5)
试验旨在研究添加不同剂量的粪肠球菌对产蛋后期蛋鸡生产性能、蛋品质及肠道形态结构的影响。选取70周龄产蛋率相近的海兰褐蛋鸡270只,随机分为3个处理,每个处理6个重复,每个重复15只鸡。试验设对照组(饲喂基础日粮)、试验Ⅰ组(基础日粮+3.75 mg/kg粪肠球菌)和试验Ⅱ组(基础日粮+7.5 mg/kg粪肠球菌),预试期7 d,正试期50 d。结果表明,与对照组相比,试验Ⅰ、Ⅱ组产蛋后期蛋鸡产蛋率、产蛋量极显著提高(P0.01),料蛋比极显著降低(P0.01);与对照组相比,试验Ⅰ、Ⅱ组蛋鸡的蛋壳厚度、蛋壳强度、蛋形指数、蛋白高度、哈夫单位、蛋黄相对重、蛋壳相对重均无显著变化(P0.05);与对照组相比,试验Ⅰ、Ⅱ组产蛋后期蛋鸡十二指肠、回肠的黏膜厚度极显著增加(P0.01),回肠绒毛高度显著提高(P0.05)。综上所述,在产蛋后期蛋鸡日粮中添加适宜剂量的粪肠球菌可提高蛋鸡生产性能,改善肠道形态结构。 相似文献
5.
本试验旨在研究饲粮中添加黑水虻幼虫粉对蛋鸡产蛋后期生产性能、蛋品质及血液生理生化指标的影响。选取60周龄、健康、产蛋率接近的海兰褐蛋鸡1080只,随机分为4组,每组6个重复,每个重复45只鸡,对照组饲喂基础饲粮,试验Ⅰ、Ⅱ、Ⅲ组在基础饲粮中分别添加1%、2%、3%的黑水虻幼虫粉。预试期7 d,正试期60 d。结果表明:1)与对照组相比,试验Ⅱ、Ⅲ组蛋鸡产蛋后期的产蛋率显著提高(P<0.05),料蛋比显著降低(P<0.05),试验Ⅲ组的破软蛋率显著降低(P<0.05)。2)饲粮中添加黑水虻幼虫粉对蛋鸡产蛋后期的蛋壳颜色、蛋形指数、蛋白高度、哈氏单位、蛋壳厚度、蛋壳强度、蛋黄相对重、蛋壳相对重及蛋黄胆固醇含量均无显著影响(P>0.05)。3)与对照组相比,试验Ⅱ、Ⅲ组蛋鸡产蛋后期血清中天冬氨酸氨基转移酶活性和葡萄糖含量显著提高(P<0.05),试验Ⅲ组血清高密度脂蛋白胆固醇含量显著提高(P<0.05),但饲粮中添加黑水虻幼虫粉对蛋鸡的血液生理指标和其他血清生化指标均没有显著影响(P>0.05)。由此可见,饲粮中添加黑水虻幼虫粉可提高蛋鸡产蛋后期的生产性能,改善血清生化指标,且不会对蛋鸡机体内环境稳态产生不良影响。 相似文献
6.
《中国家禽》2021,(12)
试验旨在研究大豆异黄酮对产蛋后期蛋鸡产蛋性能、蛋品质、血浆生化指标和抗氧化能力的影响,为改善产蛋后期蛋鸡产蛋性能和机体健康提供依据。试验选取健康、体重、产蛋率相近的360只55周龄京粉1号蛋鸡,随机分成2个组,每个组6个重复,每个重复30只鸡。对照组饲喂玉米-豆粕基础饲粮,试验组在基础饲粮基础上添加10 mg/kg的大豆异黄酮,预试期为2周,试验期为8周。结果显示:饲粮添加10 mg/kg大豆异黄酮对产蛋后期京粉1号蛋鸡的产蛋性能无显著影响(P0.05),但可提高鸡蛋的蛋壳厚度和强度(P0.05),对产蛋后期京粉1号蛋鸡血浆中总蛋白、白蛋白、葡萄糖、谷草转氨酶、甘油三酯、胆固醇、总抗氧化物能力、丙二醛、总超氧化物歧化酶的含量均无显著影响(P0.05),但显著增加了血浆中的钙、磷和谷胱甘肽过氧化物酶的含量(P0.05)。综上,在产蛋后期京粉1号蛋鸡饲粮中添加10 mg/kg大豆异黄酮可提高蛋壳品质,增强血浆抗氧化功能。 相似文献
7.
试验旨在研究添加不同剂量的粪肠球菌对产蛋后期蛋鸡生产性能、蛋品质及肠道形态结构的影响。选取70周龄产蛋率相近的海兰褐蛋鸡270只,随机分为3个处理,每个处理6个重复,每个重复15只鸡。试验设对照组（饲喂基础日粮）、试验Ⅰ组（基础日粮+3.75 mg/kg粪肠球菌）和试验Ⅱ组（基础日粮+7.5 mg/kg粪肠球菌）,预试期7 d,正试期50 d。结果表明,与对照组相比,试验Ⅰ、Ⅱ组产蛋后期蛋鸡产蛋率、产蛋量极显著提高（P<0.01）,料蛋比极显著降低（P<0.01）;与对照组相比,试验Ⅰ、Ⅱ组蛋鸡的蛋壳厚度、蛋壳强度、蛋形指数、蛋白高度、哈夫单位、蛋黄相对重、蛋壳相对重均无显著变化（P>0.05）;与对照组相比,试验Ⅰ、Ⅱ组产蛋后期蛋鸡十二指肠、回肠的黏膜厚度极显著增加（P<0.01）,回肠绒毛高度显著提高（P<0.05）。综上所述,在产蛋后期蛋鸡日粮中添加适宜剂量的粪肠球菌可提高蛋鸡生产性能,改善肠道形态结构。 相似文献
8.
9.
试验旨在研究摩钙技术在海兰褐蛋鸡产蛋后期预混料中的应用。选择384日龄3360只健康、产蛋率和体重相近的海兰褐蛋鸡,随机分为2组,每组3个重复,每个重复560只鸡。对照组和试验组分别饲喂不同预混料(5%产蛋鸡预混料和摩钙型蛋鸡预混料)配制的日粮。结果显示:与对照组相比,试验组产蛋数和产蛋率分别显著提高5.28个和0.93%(P<0.05);蛋品质方面,与对照组相比,试验组显著提高了哈氏单位(P<0.05),显著降低了蛋黄比例(P<0.05),蛋壳厚度、蛋黄系数、蛋形指数、蛋白比例、蛋壳比例以及蛋壳颜色L*、a*和b*差异不显著(P>0.05)。结果表明,摩钙型蛋鸡预混料可提高海兰褐蛋鸡产蛋后期的生产性能和蛋品质。 相似文献
10.
《黑龙江畜牧兽医》2017,(4)
为了研究复合菌微生态制剂对产蛋后期蛋鸡生产性能和蛋品质的影响,试验选择62周龄体况良好、产蛋率接近的健康海兰褐蛋鸡10 000只,随机分为2组,每组5个重复,每个重复1 000只。对照组饲喂基础日粮,试验组饲喂基础日粮+0.05%复合菌微生态制剂(500 g/t)。预试期1周,正试期4周。结果表明:复合菌微生态制剂对62周龄蛋鸡采食量无显著影响(P0.05),能提高蛋鸡产蛋率,延缓产蛋后期产蛋率的下降趋势,试验组平均产蛋率较对照组显著提高(P0.05);提高蛋鸡蛋重,降低不合格蛋率,提高蛋壳强度,但差异均不显著(P0.05),对蛋壳厚度和蛋黄颜色无显著影响(P0.05),显著增加蛋白高度和哈氏单位(P0.05)。说明添加0.05%复合菌微生态制剂可以提高蛋鸡生产性能,改善蛋品质。 相似文献
11.
G. N. Isitor H. M. Kazeem C. O. Njoku D. S. Adegboye H. D. Dellmann 《Tropical animal health and production》1988,20(1):2-10
Summary By combined electron microscopical and serological methods the rate of involvement of pox virions within lesions of bovine natural dermatophilosis was determined. Scabby lesions of 40 (77%) out of a total of 52 cases were positive for the virions, while sera of all infected animals which reacted positively for pox viral antibodies (LSD) was significantly higher (P<0·001) in comparison to those of healthy-appearing animals. The virions in all cases had a uniform oval to cylindrical morphology with a mean measurement of 110 × 280 nm. A synergistic interplay involving the initiation of the scabby lesions by the virions and their subsequent trapping within keratin deposits, followed by their release through the keratolytic activity ofDermatophilus congolensis appear to have obtained in cases.
Frecuencia Del Compromiso De Viriones Pox En Lesiones De Dermatiofilosis Bovina
Resumen Se determinó la tasa del compromiso de viriones pox, con lesiones de dermatofilosis bovina natural, mediante la combinación de microscopía electrónica y serológica. Cuarenta lesiones costrosas (77%) de un total de 52 casos fueron positivas a viriones, mientras que el suero de todos los animales infectados que reaccionaron positivamente para anticuerpos pox (LSD) fueron significativamente más altos (P<0.001) en comparación a aquellos de animales aparentemente sanos. Los viriones en todos los casos tuvieron una morfología uniforme, de oval a cilíndrica con una media de 110 × 280 nm. Se obtuvo un sinergismo recíproco que involucró la iniciación de las lesiones costrosas por los viriones, los cuales quedaron atrapados subsecuentemente en los depósitos de queratina, seguido de la liberación de los mismos a través de la acción queratolítica delDermatophilus congolensis.
Frequence De La Participation De Virions Pox Dans Les Lesions De Dermatophilose Bovine
Résumé Par utilisation combinée de méthodes sérologiques et de microscopie électronique, on a pu déterminer la fréquence de participation de virions pox dans les lésions de dermatophilose bovine naturelle. Les lésions croûteuses de 40 (77%) cas sur 52 ont été positives pour les virions, tandis que les sérums de tous les animaux qui réagissent positivement pour les anticorps antiviraux pox (LSD) sont significativement supérieurs (P<0,001) comparés à ceux des animaux apparemment en bonne santé. Dans tous les cas, les virions ont une morphologie uniforme ovale à cylindrique, avec une taille moyenne de 110 × 280 nm. On a pu obtenir dans certains cas une interaction synergique, mettant en jeu l'initiation de lésions croûteuses par les virions et leur piégeage ultérieur dans les dépôts kératinisés, suivi de leur relargage dû à l'activité kératinolytique deDermatophilus congolensis.相似文献
12.
Summary Fourteen donkeys from a communal area of the Zimbabwean highveld were examined for stomach parasites during July and November of 1986 and January and April of 1987. All 14 animals were infected. Habronema muscae occurred in 12, Draschia megastoma in 11, H. majus in 9, Trichostrongylus axei in 9, Gasterophilus intestinalis in 14 and G. nasalis in 1 donkey. The lowest level of infection was in January for the helminthes and in April for Gasterophilus larvae. The peak burdens of parasites were in July for Habronema spp. and in November for D. megastoma and Gasterophilus larvae. Infections with spirurid worms and Gasterophilus develop mainly from the middle of the rainy season to the beginning of the dry season (Januari to May/June). G. intestinalis seems to have an annual cycle. 相似文献
13.
M.A.S. Jones Dip.Agric B.V.Sc. Dip.Microbiol. Ph.D. A.D. Shannon B.V.Sc Ph.D. 《New Zealand veterinary journal》2013,61(6):86-90
Abstract Extract The results of the 1965–6 New Zealand national mastitis survey (Anon., 1967) indicated that β-haemolytic staphylococci were the most common bacteria isolated from the milk of dairy cows. Effective control of β-haemolytic stapyhlococci on a national scaledepends ultimately upon an understanding of population changes of this organism within the cow and within the herd. 相似文献
14.
J. A. Wofford B. Zollers L. Rhodes M. Bell E. Heinen 《Journal of veterinary pharmacology and therapeutics》2018,41(2):324-333
Capromorelin is a ghrelin receptor agonist that is FDA approved for appetite stimulation in dogs. The objective of this study was to evaluate the safety of daily oral administration of capromorelin to cats over a range of doses and for an extended period. Two randomized, controlled studies were conducted: in Study 1, cats (n = 6 per group) received placebo or capromorelin at a dose of 9, 15, 30 or 60 mg/kg once daily for 14 days; and in Study 2, cats received capromorelin at 6 mg/kg (n = 8) or placebo (n = 4) once daily for 91 days. Cats were evaluated using clinical observations and clinical pathology test results for both studies, with the addition of postmortem examination in Study 1 and measurements of growth hormone and insulin‐like growth factor 1 in Study 2. Abnormal clinical observations were limited to emesis, hypersalivation, lethargy/depression, head shaking and lip smacking, which occurred more frequently in the capromorelin‐treated groups than in the placebo group. There were no clinically relevant differences in clinical pathology test results between the capromorelin and placebo groups in either study. 相似文献
15.
Effects of considering the comminution rate (kc) and the correction of microbial contamination (using 15N techniques) of particles in the rumen on estimates of ruminally undegraded fractions and their intestinal digestibility were examined generating composite samples (from rumen‐incubated residues) representative of the undegraded feed rumen outflow. The study used sunflower meal (SFM) and Italian ryegrass hay (RGH) and three rumen and duodenum cannulated wethers fed with a 40:60 RGH to concentrate diet (75 g DM/kgBW0.75). Transit studies up to the duodenum with Yb‐SFM and Eu‐RGH marked samples showed higher kc values (/h) in SFM than in RGH (0.577 vs. 0.0892, p = 0.034), whereas similar values occurred for the rumen passage rate (kp). Estimates of ruminally undegraded and intestinal digestibility of all tested fractions decreased when kc was considered and also applying microbial correction. Thus, microbial uncorrected kp‐based proportions of intestinal digested undegraded crude protein overestimated those corrected and kc?kp‐based by 39% in SFM (0.146 vs. 0.105) and 761% in RGH (0.373 vs. 0.0433). Results show that both kc and microbial contamination correction should be considered to obtain accurate in situ estimates in grasses, whereas in protein concentrates not considering kc is an important source of error. 相似文献
16.
The relative virulence of various strains of Moraxella bovis (M. bovis) was studied using the eyes of mice and cattle. The investigation consisted of three separate experiments. Experiments I and II involved a study on the effects of (1) different methods of growth and (2) serial blood agar passaging on the virulence of M. bovis. Experiment III involved a study on the relative virulence of different strains of M. bovis and M. bovis-like organisms.
Strains of M. bovis and M. bovis-like organisms varied in their pathogenicity for mice. However, different methods for preparation of exposure cultures of M. bovis did not influence the disease produced.
相似文献17.
J.S. Ahluwalia B.V.Sc. M.S. Ph.D. W.A.G. Charleston B.V.Sc. Ph.D. M.R.C.V.S. M.A.C.V.Sc. 《New Zealand veterinary journal》2013,61(12):237-238
Abstract Extract Although exsheathment of the infective larvae of many strongylate nematode parasites of ruminants has been studied (Rogers, 1966), that of Cooperia curticei larvae has not. By analogy with other trichostrongylid species inhabiting the small intestine, they would be expected to exsheath in response to conditions provided by the abomasum, perhaps, as with Trichostrongylus colubriformis, with a potentiating effect of bile salts in the small intestine (Mapes, 1972). It was decided to see if C. curticei larvae exsheathed as expected; no attempt was made to define precisely the conditions necessary for exsheathment but rather to establish the site at which the stimulus is received. 相似文献
18.
《The Professional Animal Scientist》1999,15(2):116-123
Feedlot performance, carcass characteristics, and diet composition data were collected from a survey of finishing steer experiments (40 experiments; 347 kg average initial weight; data excluded Holstein steers). Data were analyzed by weighted (observations/mean) analyses of variance to determine effects of protein intake and implanting strategy on feedlot performance and carcass characteristics. Implanting strategies were defined according to prevalent or last implant type used: no implant (None); medium-potency implants (Medium): zeranol 72 mg per dose, steroid-based implants (Synovex-S or Compudose) or trenbolone acetate (TBA) alone; high-potency implants (High): TBA in combination with either steroids or zeranol. Regression procedures were utilized to estimate CP and DIP, or MP requirements. Implant effects were independent (P>0.60) of dietary protein effects and included faster (P<0.05) gains at higher intakes (P<0.05) that resulted in improved (P<0.05) feed efficiencies. Steers responded to higher dietary CP (13.3 vs 11.4%) by increasing intake (P<0.05) which resulted in faster (P<0.05) and more efficient (P=0.09) gains. Compared to nonimplanted steers, implanted steers had heavier (P<0.05) carcasses with larger (P<0.05) ribeyes and lower (P<0.05) marbling scores. Nonimplanted steers fed 13.3% CP diets had heavier (P<0.05) carcasses than nonimplanted steers fed 11.4% CP diets. Maintenance MP requirements of nonimplanted steers were greater than those of implanted steers and similar to established MP requirements. Diets of steers implanted with high-potency implants must be supplemented to contain more than 7.5 g MP/kg BW0.75/d, especially at heavy (>450 kg) initial BW, to maximize implant response. Implanted steers have a greater ability to respond to increased dietary protein because of reduced protein requirements for maintenance. 相似文献
19.
对10个青贮玉米品种自然发病情况进行调查,并采用病级分类方法对抗病性分类。结果表明:对锈病表现抗性和中抗的品种有3个和5个,分别占供试品种的30%和50%;对大斑病表现抗性和中抗的品种有4个和5个,分别占供试品种的40%和50%;对褐斑病表现抗性和中抗的品种有6个和3个,分别占供试品种的60%和30%;对小斑病表现抗性和中抗的品种有6个和3个,分别占供试品种的60%和30%。多数品种对青贮玉米4种病害抗性表现较好,可从青贮玉米供试材料中选用优良抗病材料用于四川地区种植。 相似文献
20.
Summary Lymnaea auriculariarace rufescensand Lymnaea luteolawere shown to transmit F. giganticain the Koshi hills of Nepal. The ecology of the snails was studied at nine different habitats in Hattikharka panchayat, the highest numbers occurring immediately after the end of the monsoon. Mature F. giganticainfections in the snails were detected from May to August and again in November. The prevalence of the infection in cattle was highest during the summer monsoon and in January and February. A control programme for fascioliasis based on these findings is suggested which requires that cattle be treated in February and possibly again in late August.
Epidemiologia De Fascioliasis En Las Colinas Koshi De Nepal
Resumen Se encontró que laLymnaea auricularia razarufescens y laLymnea luteola transmitenF. gigantica en las colinas Koshi de Nepal. Se estudió la ecología de los caracoles en 9 habitats diferentes en Hattikharka panchayat, ocurriendo el mayor número inmediatamente despues de los monsones. Las infecciones de las caracolas con fases maduras deF. gigantica, se detectaron desde mayo hasta agosto y otra vez en noviembre. La prevalencia de la infección en bovinos fue más alta durante los monsones veraneros, y posteriormente en enero y febrero. Se sugiere el tratamiento del ganado en febrero y agosto para controlar la fascioliasis.
Epidemiologie De La Fasciolose Dans Les Collines De Koshi Au Nepal
Résumé On a montré queLymnea auricularia racerufescens etLymnea luteola transmettentF. gigantica dans les collines de Koshi, au Népal. L'écologie des mollusques a été étudiée dans 9 habitats différents du panchayat d'Hatikharka; le plus grand nombre se rencontre immédiatement après la fin de la mousson. Des infections àF. gigantica matures ches les escargots ont été détectées de mai à août, et de nouveau en novembre. La prévalence de l'infestation chez le bétail est maximum pendant la mousson d'été, puis en janvier et février. Un programme de contrôle de la fasciolose est suggéré sur la base de ces découvertes; il requiert que le bétail soit traité en février et, si possible, de nouveau fin août.相似文献