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仔猪早期断奶通常会导致其生长发育迟缓，发生生长应激、腹泻、精神萎靡、免疫功能下降等症状，给养殖户带来较大经济损失。藤茶是一种药食两用植物，主要生长在我国湖南、湖北等地，藤茶消肿抗炎的功效现已被大众认可，具有较好的经济和药用价值。而藤茶的提取物——藤茶黄酮（Ampelopsis grossedentataflavonoids，AGF）是从藤茶中提取的一种含量为43.4%～44.0%的天然植物添加剂。随着提取技术的不断创新升级，藤茶黄酮的提取成本大幅降低，产品品质不断增强，藤茶黄酮在畜禽生产中的应用研究也不断深化，现已被纳入《饲料添加剂目录》。目前，因地域产地、产量等因素，藤茶及藤茶黄酮在断奶仔猪中的研究较少，尚未得到广泛推广应用。本试验将探讨藤茶提取物对断奶仔猪的生长性能、抗氧化和免疫性能的影响，以期为藤茶及其提取物的推广和应用提供参考。 相似文献
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藤茶黄酮的提取工艺研究 总被引：1，自引：0，他引：1
对从藤茶中提取藤茶黄酮的工艺进行了研究。结果发现：以90%乙醇水溶液为溶剂,藤茶原料和乙醇水溶液的料液比（W/V）为1∶4,回流条件下提取2次,每次提取时间为1 h时,藤茶黄酮的提取率达到最佳。提取液浓缩后的粗产物在水中进行两次结晶,即可使藤茶黄酮产品中的有效成分二氢杨梅素的含量达到85%以上。此研究得到的藤茶黄酮提取、纯化工艺简单、提取率高,适合工业化生产。 相似文献
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中草药饲料添加剂是一种资源丰富、应用前景十分广阔的天然优质饲料添加剂,含有多种结构成分,如多糖,甙类、酮类化合物等活性物质,实践证实中药作为饲料添加剂有促进动物食欲、增强机体抵抗力、提高饲料转化率、促进动物生长的作用,长期使用无污染、无残留,而且很少产生细菌耐药性、毒副作用,安全性较高。主要就中草药饲料添加剂的分类、生物功能及在养猪生产上的应用等问题进行了综述。 相似文献
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党的十九大以来,依法治国得到重新定位,被提升到了一个更加重要的高度,全面依法治国是新时代新时期的重要指示精神,依法治国是我国全面建成小康社会、全面推进建设法治社会的重要前提。我国饲料业从建设伊始发展以来,从最初的个人小作坊模式逐渐发展至今,饲料业已经是关乎畜牧业、养殖业等民生企业的农业大型支柱产业之一,我国作为农业大国,每年消耗的农产品数量巨大,其中畜牧业养殖业更是做出了突出贡献,作为其上游行业(饲料业)对其的影响不可忽视。饲料作为养殖动物成长过程中的重要材料,其质量直接影响到人们入口后的食材质量,饲料添加剂所含的微量元素是否超标,将会经过肉类、蛋类的二次销售而影响消费人群,故而饲料添加剂的严格管理十分必要,将饲料添加剂列入法律管理,形成书面规定,也是依法治国的一种表现形式。 相似文献
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替代抗生素饲料添加剂研究进展 《畜牧与饲料科学》2021,42(3):39-42
抗生素作为主要的饲料添加剂在几十年的广泛应用过程中造成了致病菌耐药性增强、动物免疫力降低、影响动物疫苗的效价、通过食物链影响人体健康等亟待解决的问题。我国农业农村部已发布公告,自2020年起我国饲料全面禁止添加使用抗生素类添加剂,饲料行业正式进入“无抗时代”。长期以来,研究人员积极寻求研发各种抗生素替代品及绿色无害的饲料添加剂,以消除或减轻禁用抗生素带来的一系列影响。就目前主要抗生素替代品的抗菌特点及抗菌机理进行综述,旨在为“禁抗”后抗菌性添加剂在饲料中的应用提供参考。 相似文献
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仔猪早期断奶腹泻是困扰养猪业的严重问题,随着饲用抗生素作为饲料添加剂的禁止使用,寻求能够替代抗生素的新的生长促进剂成为研究的热点。益生肠球菌主要应用于医疗保健行业,研究主要集中在粪肠球菌(Enterococcus faecalis)和屎肠球菌(Enterococcus faecium),有关益生肠球菌作为饲料添加剂在动物饲料中的应用也逐渐引起了人们的关注,对其作用机制及有效包被技术的研究已取得了一些进展。通过介绍益生肠球菌在动物饲养,尤其是断奶仔猪中的应用现状和存在问题,以亟为该领域的研究提供参考。 相似文献
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饲料添加剂是饲料的核心部分，对动物有促生长和预防疾病的作用。它的起源产生、发展壮大、应用现状和发展趋势，对饲料工业的发展和畜牧业大生产起到了促进作用。 相似文献
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The effects of three levels of manure application (0, 4 and 8 ton/10 a) with basic fertilizer (N : P : K = 10:10:10 kg/10 a) on the yield and chemical composition of maize (Pioneer 32K61) and sorghum (FS501) forages were examined in 2 successive years, 2001–2002. Maize was harvested at yellow ripe stage, while sorghum at dough stage. Dry matter yield (DMY) of sorghum was significantly higher than that of maize in both 2001 and 2002. Although, DMY of both sorghum and maize were not significantly affected by manure levels in 2001, they increased with the level of manure in 2002. Maize had higher levels of crude protein (CP) and lower crude fiber concentration than those of sorghum in both 2001 and 2002. Manure application had no effect on chemical compositions of both maize and sorghum except for CP in both years and organic a fraction (Oa) concentration in 2002. The higher manure application might have greater effects on sorghum and maize production because of higher DMY in the second year without any increase in fiber fraction. 相似文献
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《动物营养（英文）》2021,7(3):896-904
In the last few years, feed additives have been used in animal nutrition to improve nutrient utilization, health parameters and animal performance. However, the use of antibiotics as feed additives has allowed the occurrence of antimicrobial resistance (AMR), which can bring as a consequence, an increase in the morbidity and mortality of diseases that were previously treatable with antibiotics. In this context, antimicrobial peptides (AMP) have appeared as a promising strategy because they have multiple biological activities and represent a powerful strategy to prevent the development of resistant microorganisms. Despite the small number of studies applied in vivo, AMP appear as a potent alternative to the use of antibiotics in animal nutrition, due to an increase in feed efficiency and the prevention/treatment of some animal diseases. This review discusses the problems associated with antimicrobial resistance and the use of AMP as a strong candidate to replace conventional antibiotics, mainly in the animal industry. 相似文献
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The purpose of this review is to summarize the effectiveness, modes of action and commercial application of herbal plants and their derivatives as growth promoters for animal. Feed supplements
are a group of feed ingredients that can cause a desired animal response in a non-nutrient role such as pH shift, growth,
or metabolic modifier (Hutjens, 1991). Common feed additives used in animal diets include immunostimulators, antimicrobials, antioxidants, pH control agents and
enzymes. Herbal plants, are a new class of growth promoters and in recent years this feed additives have gained extensive
attention in the feed industry. They are a wide variety of herbs, spices, and products derived thereof, and are mainly essential
oils. Although numerous reports have demonstrated antioxidative and antimicrobial and immune stimulation efficacy in vitro, respective experimental in vivo evidence is still quite limited. A limited number of experimental comparisons of herbal plants feed additives with antibiotics
or organic acid have suggested similar effects on the animal gut microflora. Gut microflora has significant effects on host nutrition, health, and growth performance by interacting with nutrient utilization
and the development of gut system of the host. In addition, some phytogenic compounds seem to promote intestinal mucus production.
However, the future of using herbs in animal feeding will in great measure depend on the knowledge of chemical structure, their value and characteristics of practical herbs or their extract physiological needs and well-being of animal, and, above
all on consumer’s preferences and expectations. 相似文献
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纳豆菌是生产微生态制剂的理想菌株之一,现已作为绿色饲料添加剂广泛应用于饲料。本文主要就近年来纳豆菌制剂在动物养殖中的研究与应用成果作一概述,以期为畜牧生产提供参考。 相似文献