维生素缺乏E对大白鼠肝脏中维生素A含量的影响

实际生产中人们对维生素A缺乏问题很关注。近期报道维生素A和维生素E之间有拮抗作用，日粮中维生素E量对动物机体脏器中维生素A含量有很大影响。为了验证此说法，笔者进行了喂服维生素E缺乏的饲料来测定动物肝脏中维生素A含量的试验，具体过程报道如下：     

新疆石河子奶牛维生素A、E营养状况调查

为了解石河子奶牛维生素A、E的营养状况,我们对石河子奶牛饲草料饲喂情况进行了调查,并对奶牛血清中维生素A、E含量进行了检测。检测结果表明：石河子奶牛维生素A、E均有不同程度的缺乏,维生素A缺乏检出率为27.8%,可疑缺乏的检出率为58.3%;维生素E缺乏检出率为5.6%,可疑缺乏的检出率为78.7%;夏季是奶牛维生素A、E缺乏多发季节;胎衣不下与维生素A、E缺乏有关。     

维生素A最适需要量的研究进展

维生素A是一种脂溶性维生素,与脂肪一起吸收,在动物体中可以进行贮存,主要贮存在肝脏中。维生素A有许多重要的生理作用,维生素A(VA)缺乏或过量都会对动物产生不良影响。在实际生产中人们更关注维生素A的缺乏问题,因此往往是添加量远远高于需要量,造成维生素A的过量。如果添加量适当高于标准推荐量,对增强动物的应激能力和健康状况及生产性能都有一定的好处,但盲目添加高剂量的维生素A不但造成维生素A的浪费,甚至会抑制动物生长,降低动物的生产性能,同时因维生素A与其它营养素间的互作与拮抗而影响其它营养素的利用,特别是降低维生素E的…     

幼畜饲料中的维生素

最近营养学家认为,根据猪的需要,必须在饲料中增加维生素E的含量.猪由于缺乏维生素E,经常引起桑椹心脏病.猪的一生中,随时可能出现维生素缺乏的情况.特别是在断奶后7～10天期间,血浆中维生素E的含量明显下降.缺乏维生素E的原因,通常是脂肪含量过高,或者脂肪质     

维生素A D E预防奶牛胎衣滞留的研究报告

维生素在动物代谢中具有重要的生理功能,特别是脂溶性维生素A、D和维生素E对维护家畜的正常生理活动起着很大的作用。高产奶牛由于饲喂精料过多,加之采食的干料和青贮饲料在调制与贮存过程中,胡萝卜素及维生素A、E损失严重,造成维生素A、D、E和部分微量元素缺乏,     

维生素的功能与补充量

动物的生长和代谢所必需的微量有机物,分为脂溶性维生素和水溶性维生素两类。前者包括维生素A、维生素D、维生素E、维生素K等,后者有B族维生素和维生素C。人和动物缺乏维生素时不能正常生长,并发生特异性病变,即维生素缺乏症。     

家禽饲料中缺乏维生素的主要因素

维生素是动物维持正常生理功能所必需的物质,饲料中缺乏任何一种维生素,动物都会发生疾病症状,严重影响畜牧业生产。通过研究和生产,我们认为以下是家禽饲料中缺乏维生素的主要因素。一、配合饲料对维生素的影响。由于自然界各种动植物维生素含量的不同,如:黄色玉米、肝脏、胡萝卜含维生素 A 多;晒制的干草、干酵母等含维生素 D 多;大豆饼、棉籽饼含维生素 E 多;鱼粉、大豆类、谷类含维生素B_1、B_2多;肝脏、鱼粉、肉骨粉含维生素 B_(12)多。     

调整日粮中维生素A和E的平衡降低仔猪死亡率

研究者通过对两组猪饲喂不同含量的维生素A、E实验,证实日粮中增加维生素E含量,降低维生素A标准含量,可极大地提高母猪吸收维生素E的能力,这导致了其哺乳仔猪血液中有较高量维生素E在体内循环,维生素E含量高能够降     

维生素E缺乏对雏鸡红细胞血红蛋白含量及G-6-PD活性的影响

维生素E是机体内具有广泛生理功能的重要脂溶性维生素和营养性抗氧化剂,广泛存在于体内储脂器官和生物膜上,具有免疫调节、阻止自由基对组织攻击和维持膜结构的稳定等重要作用[1-2].有关维生素E缺乏对雏鸡红细胞影响方面的研究未见有文献报道.本试验用人工建立的维生素E缺乏症雏鸡模型,通过对雏鸡红细胞G-6-PD活性和血红蛋白(Hb)含量的检测,旨在探讨维生素E缺乏对雏鸡红细胞的影响,为揭示维生素E缺乏对雏鸡红细胞的损伤机制提供依据.     

蛔虫对雏鸡体内胡萝卜素和维生素A和E的影响

对动物体内脂溶性维生素和寄生虫相互作用的研究是不够充分的。可以断定,动物和禽类寄生虫能够引起维生素特别是维生素A含量的减少(1.Acker等,1935;什赫巴洛娃,古斯道娃,A.M.卡西莫娃,1950;阿克宾,1956;和其它人)。我们的研究目的是蛔虫对胡萝卜素、维生素A和和维生素E含量的影响,以及测定禽类驱虫后它们恢复的期限。     

维生素A、维生素D和维生素E在动物体内的相互作用

本文主要综述了维生素A、维生素D和维生素E在动物体内的相互作用及其可能的机制,为科学确定这些维生素在动物日粮中的适宜添加量,提高动物的生产性能提供依据。     

Vitamin E

Vitamin E activity was first identified as a dietary factor essential for reproduction in the rat. It is now known that this vitamin has a far wider range of functions in the body than its role in fertility. It interacts with selenium-containing glutathione peroxidase to prevent the oxidative breakdown of tissue membranes associated with the hydroperoxides of polyunsaturated fatty acids. Relationships with other factors such as stress and vitamin C, have been proposed. The symptoms of deficiency of vitamin E vary according to species. With so many variables it is difficult to estimate the optimum allowances of the vitamin for the many types of livestock diets. These problems are discussed and the calculation of allowances of vitamin E in rations for both monogastric and ruminant animals is explained.     

Serum Vitamin E Concentration of Horses on Different Vitamin E Supplementation Levels

Abstract

The influence of vitamin E supplementation on blood serum vitamin E concentration as well as the seasonal variation of serum vitamin concentration was investigated. Forty horses were divided into a control and three vitamin E supplementation (experimental) groups. The levels of the vitamin E supplementation in the three experimental groups were 1, 3 or 5 mg/kg body weight (bwt) per day. The vitamin was dosed orally. The supplementation was started either at the beginning or in the middle of the indoor (winter) feeding period. There was seasonal variation in the serum vitamin E content; the serum vitamin concentration increased during the grazing and decreased during the indoor feeding period. The basal feeding and a daily supplement of 1 mg/kg bwt were not adequate to maintain or increase the serum vitamin E concentration during the indoor feeding period in an exercising horse. The minimum daily intake of vitamin E would seem to be greater than 1.5 mg/kg bwt. It is suggested that a daily supplement of 3 to 5 mg/kg bwt may be required by horses in training to increase the serum vitamin E levels. This amounts to 1500–2500 mg/day for a horse weighing 500 kg. Supplementation should be started at the beginning of the indoor feeding period.     

日粮锌与维生素A水平对维生素A代谢的影响

以216只VC-Ⅱ生长獭兔为研究对象,研究了日粮中锌与维生素A的不同水平对獭兔体内维生素A代谢的影响。结果表明:日粮锌水平可显著影响血清维生素A含量,而不影响肝脏维生素A含量;日粮维生素A水平可显著影响血清及肝脏维生素A含量。证明日粮锌与维生素A水平在血清维生素A浓度上存在互作效应。     

维生素A、E对獭兔繁殖性能的影响

28只繁殖獭兔随机均分两组,基础日粮相同,试验组自配种前3天至妊娠第7天于日粮中添加维生素A8mg/kg、维生素E100mg/kg。结果与对照组相比:试验组产活仔数提高了20.23%(P<0.05),断奶成活率提高了7.23%(P<0.05),增重提高7.11%(P<0.05)。     

维生素A和维生素E对母畜繁殖性能的影响

母畜的繁殖性能是考察和利用母畜的一个重要参数,影响母畜繁殖性能的因素主要有遗传力、营养和环境因素.在营养因素中,脂溶性VA、VE对母畜繁殖性能的影响不容忽视,试验表明,VA、VE缺乏或过量均会对母畜的繁殖性能造成不良影响.     

维生素:做强产业需冲破应用技术困局

<正>玄米茶是一种日韩风味绿茶饮品,由于其制作是以糙米为原料经浸泡、蒸熟、滚炒等工艺制成的玄米与绿茶拼配而成,因此,既有日本传统绿茶淡淡的幽香,又蕴含特制的烘炒米香,而且具备玄米和绿茶的双重营养     

奶牛的维生素营养

奶牛是一种草食家畜，以青粗饲料为主，其维生素来源比较丰富，加之瘤胃微生物能够合成多种维生素，因而在奶牛日粮中往往容易忽视补充维生素，中国奶牛饲养标准中也仅仅规定了维生素A及胡萝卜素的需要量。但在实际生产中，由于不同季节青饲料的不均衡性以及奶牛产奶性能的提高或奶牛繁殖等需要，如不注意补充维生素，将会严重影响奶牛的健康、     

The effect of increasing the Vitamin B12 status of Romney ewes on foetal liver Vitamin B12, milk Vitamin B12 and liver Vitamin B12 concentrations in suckling lambs

AIM: To determine the effect of increasing the Vitamin B12 status of the ewe on the Vitamin B12 supply to the suckling lamb. METHODS: The Vitamin B12 status of the ewe was increased during gestation and lactation by three injections of a long-acting preparation of Vitamin B12 microencapsulated in an organic acid polymer. The Vitamin B12 status of the ewes and suckling lambs was assessed from changes in serum and liver Vitamin B12 concentrations. RESULTS: Compared to untreated animals, serum and liver Vitamin B12 concentrations of the treated ewes were increased at least 70% during gestation. Foetal liver Vitamin B12 concentrations were increased 270%. Over the lactation, ewe serum and milk Vitamin B12 concentrations were increased at least 200% and 44%, respectively. The liver Vitamin B12 stores of the newborn lambs from Vitamin B12-treated ewes were depleted within 58 days. There were no significant differences in the serum Vitamin B12 concentrations of suckling lambs from Vitamin B12-treated and untreated ewes. CONCLUSION: Ewes with a high Vitamin B12 status will ensure an adequate supply of Vitamin B12 to their lambs for at least the first 30 days of life. CLINICAL SIGNIFICANCE: In flocks grazing Co-deficient pastures, treating ewes with a long-acting Vitamin B12 supplement at mating will prevent Vitamin B12 (Co) deficiency in ewes, as well as their lambs, until they can be treated at tailing at 4-6 weeks of age.