共查询到20条相似文献,搜索用时 203 毫秒
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庞惠文 《国外畜牧学(猪与禽)》2016,(12):1-4
正人们低估了肠道微生物菌群及其遗传学对动物健康和生长性能的影响。饲料和抗生素仅是少数能改变动物肠道微生物菌群组成的物质。遗传学在动物生长和存活性状中起着重要的作用,这并不是什么新的观点;但是,肠道微生物菌群的遗传组成及其对上述性状的影响却很少能成为人们的理论和研究 相似文献
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肽乐宝是以抗菌肽和益生菌为主的畜禽专用添加剂,对调控动物肠道菌群平衡、改善动物肠道健康、减少腹泻、提高饲料利用率和提高抗病力、促进生长等方面具有一定功效。在相同的饲料管理环境条件下,试验观察肽乐宝对商品猪(小猪至大猪全程)健康、生长性能及经济效益的影响。 相似文献
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肠道健康是保证畜禽正常生长的关键,而肠道健康在很大程度上受肠道微生物菌群及其形态结构的影响,因此改善畜禽肠道内微生物菌群平衡及其形态结构在养殖生产过程中就显得尤为重要。本文主要阐述了畜禽肠道微生物菌群平衡的重要性以及畜禽在不同生理状态下肠道内微生物组成的变化情况;另结合当前国际无抗养殖的趋势,抗生素作为生长促进剂的使用已受到越来越严格的限制,各种抗生素替代物不断涌现,成了当前的研究热点,重点阐述和比较了抗生素及其替代物在畜禽肠道内的作用机理以及其对肠道菌群和形态结构的影响。 相似文献
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Strategies to modulate the intestinal microbiota and their effects on nutrient utilization,performance, and health of poultry 总被引:1,自引:0,他引:1
Poultry is widely produced and consumed meat global y. Its demand is expected to continue increasing to meet the animal protein requirement for ever-increasing human population. Thus, the chal enge that poultry scientists and industry face are to produce sufficient amount of poultry meat in the most efficient way. In the past, using antibiotics to promote the growth of poultry and manage gut microbiota was a norm. However, due to concerns over potential fatalistic impacts on food animals and indirectly to humans, their use as feed additives are banned or regulated in several jurisdictions. In this changed context, several alternative strategies have been proposed with some success that mimics the functions of antibiotics as growth promoters and modulate gut microbiota for their beneficial roles. These include the use of probiotics, prebiotics, organic acids, and exogenous enzyme, among others. Gut microbiota and their metabolic products improve nutrient digestion, absorption, metabolism, and overal health and growth performance of poultry. This paper reviews the available information on the effect of feed additives used to modulate intestinal microbiota of poultry and their effects on overal health and growth performance. Understanding these functions and interactions wil help to develop new dietary and managerial strategies that wil ultimately lead to enhanced feed utilization and improved growth performance of poultry. This review wil help future researchers and industry to identify alternative feed ingredients having properties like prebiotics, probiotics, organic acids, and exogenous enzymes. 相似文献
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植物提取物添加剂在动物营养中的应用及其机制的研究进展 总被引:3,自引:0,他引:3
植物提取物添加剂具有提高动物生产性能、无残留和无抗药性的特点,能够为畜禽养殖业高效生产安全、健康、营养的食品提供保证.本文综述了植物提取物添加剂的抗菌和抗氧化作用,并总结了其在猪禽上的应用研究和影响其使用效果的因素. 相似文献
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《畜牧与生物技术杂志(英文版)》2016,(1)
This paper summarizes the current knowledge regarding the possible modes of action and nutritional factors involved in the use of essential oils(EOs) for swine and poultry.EOs have recently attracted increased interest as feed additives to be fed to swine and poultry,possibly replacing the use of antibiotic growth promoters which have been prohibited in the European Union since 2006.In general,EOs enhance the production of digestive secretions and nutrient absorption,reduce pathogenic stress in the gut,exert antioxidant properties and reinforce the animal's immune status,which help to explain the enhanced performance observed in swine and poultry.However,the mechanisms involved in causing this growth promotion are far from being elucidated,since data on the complex gut ecosystem,gut function,in vivo oxidative status and immune system are still lacking.In addition,limited information is available regarding the interaction between EOs and feed ingredients or other feed additives(especially pro- or prebiotics and organic acids).This knowledge may help feed formulators to better utilize EOs when they formulate diets for poultry and swine. 相似文献
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肠道微生物在调节宿主生理机能、代谢和免疫功能等方面发挥着非常重要的作用,是影响猪健康和重要经济性状表型的重要因素之一。近年来,人们对猪肠道微生物的研究和了解越来越深入,了解猪肠道微生物组成将有助于为从肠道菌群方向入手改善猪群健康和提高生产性能提供参考。作者首先综述了不同发育阶段、不同肠道部位以及主要商品猪和中国地方猪肠道核心菌群组成;其次系统总结了宿主遗传背景、饲粮种类、性别、环境以及抗生素、益生菌和饲料添加剂使用等因素对猪肠道微生物组成的影响;最后概述了猪肠道微生物主要功能及其对饲料利用率、脂肪沉积、宿主行为和免疫炎症等方面的影响。 相似文献
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M. Bucław 《Journal of animal physiology and animal nutrition》2016,100(6):1015-1022
Since the European Union enforced the ban on antibiotic growth promoters in 2006, the research has been focused on natural feed additives which would have a proven positive impact on both production and animal health. Inulin is both the most commonly used and the most effective probiotic additive. The mechanism of inulin interactions with the avian body is complex, multidirectional and not fully understood. Despite a number of unresolved issues, many authors have demonstrated the positive impact of inulin on the host organism. Dietary supplementation of poultry feeding with inulin contributes to the modulation of intestinal microbiota through favouring a quick proliferation of beneficial Bifidobacterium and Lactobacillus strains and inhibiting the growth of pathogenic microbes. There are indications that inulin‐provoked changes in the host gut microbiota in poultry may alter the structure and histomorphology of the intestinal mucosa and improve its absorption capacity in poultry. It has also been demonstrated that inulin may affect the immune system and the systemic metabolism of minerals and lipids. The reports on inulin effects on the body and performance of poultry are often contradictory, as the effectiveness of this prebiotic is strongly dependent on the type and dose used, and the duration of its administration. 相似文献
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This paper summarizes the current knowledge regarding the possible modes of action and nutritional factors involved in the use of essential oils (EOs) for swine and poultry. EOs have recently attracted increased interest as feed additives to be fed to swine and poultry, possibly replacing the use of antibiotic growth promoters which have been prohibited in the European Union since 2006. In general, EOs enhance the production of digestive secretions and nutrient absorption, reduce pathogenic stress in the gut, exert antioxidant properties and reinforce the animal’s immune status, which help to explain the enhanced performance observed in swine and poultry. However, the mechanisms involved in causing this growth promotion are far from being elucidated, since data on the complex gut ecosystem, gut function, in vivo oxidative status and immune system are still lacking. In addition, limited information is available regarding the interaction between EOs and feed ingredients or other feed additives (especially pro- or prebiotics and organic acids). This knowledge may help feed formulators to better utilize EOs when they formulate diets for poultry and swine. 相似文献
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《动物营养(英文)》2020,6(1):1-8
The last few decades have been marked by a rapid genetic improvement in chicken growth rates. The modern-day chicken is more efficient in converting feed into muscle mass than their predecessors. This enhanced efficiency emanates from better nutrient digestion, absorption, and metabolism. The gut has therefore become a research focus especially after the ban on the use of antibiotics as growth promoters (AGP) in poultry. In pursuance of better gut health in the post-AGP era, many different strategies are being continuously sought and tested. The gut is inhabited by more than 900 bacterial species along with fungi and archaea, and they play an important role to maintain a conducive milieu for the host. A beneficial shift in the microbial ecosystem of the chicken can be promoted by many dietary and non-dietary interventions, however, diet is ranked as one of the most important and potent regulators of gut microbiota composition. Therefore, the constituents of the diet warrant special attention in the modulation of the gut ecosystem. Among dietary constituents, fiber possesses a significant ability to modulate the microbiota. In this review, we will highlight the importance of fiber in poultry nutrition and will also discuss the effects of fiber on gut microbiota and its resultant ramifications on the liver and brain. 相似文献