您的位置: 首页 > 院士专题 > 专题列表

共检索到1267条,权限内显示50条;

[学术文献] 仔猪肠道微生态及其调控因素研究进展 进入全文

中国知网

肠道微生态能够影响机体营养物质的摄入、储存及消耗,对动物生长发育影响较大。微生态的建立受出生方式、饲养模式、抗生素、疾病及周围环境等多种因素的影响。随着相关研究的不断深入,肠道菌群的作用正日益受到重视。宿主的健康生长需要一个动态平衡的肠道微生态环境。仔猪阶段平衡的肠道微生态环境尚未建立,易受外界因素影响,造成生长迟缓、饲料转化率低下甚至疾病的发生。调节肠道菌群被认为是可以减少动物疾病的发生并且提高饲料转化率的一种行之有效的技术手段。作者回顾了国内外关于仔猪肠道微生态的研究进展,从肠道微生态的组成与功能入手,从不同发育阶段仔猪肠道微生态建立的过程及调控手段展开论述,以期为研究仔猪肠道微生态的形成、成熟及微生态对仔猪生长发育的作用提供理论参考。

[学术文献] 氧化锌及改性氧化锌对仔猪生长性能和肠道健康的影响 进入全文

中国知网

药理水平的氧化锌广泛用于断奶仔猪的腹泻控制和生长促进,但同时会引起环境污染以及细菌对抗生素的抗性。与药理水平氧化锌相比,改性氧化锌在不降低仔猪生长性能的前提下,可实现生产中的氧化锌减量、环境减排。本文综述了改性氧化锌的类型以及其对仔猪生长性能和肠道健康的影响,以期为改性氧化锌在仔猪生产中的应用提供参考。

[学术文献] 益生菌在断奶仔猪中应用的研究进展 进入全文

中国知网

益生菌作为抗生素的替代品之一,可以维持和调整动物肠道内正常微生物菌群,促进营养物质的吸收,提高动物机体的免疫力,利于动物生长。益生菌制剂在提高断奶仔猪的生产性能、调节肠道的微生态平衡、改善免疫指标与抗氧化等方面起重要作用。文章综述了益生菌在断奶仔猪中应用的研究进展,以期为进一步开发和利用益生菌制剂提供依据。

[学术文献] Effects of dietaryHermetia illucensmeal inclusion on cecal microbiota and small intestinal mucin dynamics and infiltration with immune cells of weaned piglets 进入全文

Web of Science

Background The constant interaction between diet and intestinal barrier has a crucial role in determining gut health in pigs.Hermetia illucens(HI) meal (that represents a promising, alternative feed ingredient for production animals) has recently been demonstrated to influence colonic microbiota, bacterial metabolite profile and mucosal immune status of pigs, but no data about modulation of gut mucin dynamics are currently available. The present study evaluated the effects of dietary HI meal inclusion on the small intestinal mucin composition of piglets, as well as providing insights into the cecal microbiota and the mucosal infiltration with immune cells. Results A total of 48 weaned piglets were randomly allotted to 3 dietary treatments (control diet [C] and 5% or 10% HI meal inclusion [HI5 and HI10], with 4 replicate boxes/treatment and 4 animals/box) and slaughtered after 61 days of trial (3 animals/box, 12 piglets/diet). The cecal microbiota assessment by 16S rRNA amplicon based sequencing showed higher beta diversity in the piglets fed the HI-based diets than the C (P < 0.001). Furthermore, the HI-fed animals showed increased abundance ofBlautia,Chlamydia,Coprococcus,Eubacterium,Prevotella,Roseburia, unclassified members of Ruminococcaceae,RuminococcusandStaphylococcuswhen compared to the C group (FDR < 0.05). The gut of the piglets fed the HI-based diets showed greater neutral mucin percentage than the C (P < 0.05), with the intestinal neutral mucins of the HI-fed animals being also higher than the sialomucins and the sulfomucins found in the gut of the C group (P < 0.05). Furthermore, the piglets fed the HI-based diets displayed lower histological scores in the jejunum than the other gut segments (ileum [HI5] or ileum and duodenum [HI10],P < 0.05). Conclusions Dietary HI meal utilization positively influenced the cecal microbiota and the small intestinal mucin dynamics of the piglets in terms of selection of potentially beneficial bacteria and preservation of mature mucin secretory architecture, without determining the development of gut inflammation. These findings further confirm the suitability of including insect meal in swine diets.

[前沿资讯] Novel DDGS product improves energy, protein digestibility 进入全文

Feedstuffs官网

New high-protein DDGS has greater amino acid digestibility and more metabolizable energy than de-oiled DDGS but has reduced phosphorus digestibility. With a greater ability to upcycle ethanol co-products into animal feed ingredients, companies are creating custom products and partnering with University of Illinois researchers to test for quality and digestibility. In a recent study published in the Journal of Animal Science, University of Illinois researchers showed that a new high-protein dried distillers grains with solubles (DDGS) product from Marquis Energy has greater energy and protein digestibility than conventional DDGS, according to an announcement from the university.

[前沿资讯] 欧盟评估一种6-植酸酶作为猪饲料添加剂的安全性和有效性 进入全文

食品伙伴网

2020年7月21日,据欧盟食品安全局(EFSA)消息,应欧盟委员会要求,欧盟动物饲料添加剂和产品(FEEDAP)研究小组就 OptiPhos PLUS(6-植酸酶(6-phytase))作为哺乳和断奶仔猪、育肥猪、母猪、其他小型育肥猪和繁殖猪饲料添加剂的安全性和有效性发表科学意见。据了解,该添加剂是一种6-植酸酶制剂,由一种转基因巴斯德毕赤酵母(Komagataella phaffii)产生。经过评估,专家小组认为该添加剂对目标物种、消费者和环境是安全的,在使用水平为250 U/kg饲料时,可能对目标物种有效。部分原文报道如下:Following a request from the European Commission, the EFSA Panel on Additives and products or Substances used in Animal Feed (FEEDAP ) was asked to deliver a scientific opinion on the safety and efficacy of OptiPhos? PLUS (6‐phytase) as a zootechnical feed additive for suckling and weaned piglets, pigs for fattening, sows, other minor pig species for fattening and other minor reproductive pig species. The additive is a preparation of 6‐phytase produced by a genetically modified strain of Komagataella phaffii and has been previously assessed by the FEEDAP Panel in the context of two applications for its use in different species/categories. The Panel concluded in those opinions that the production strain is safe, and that the use of the additive as a feed additive would raise no safety concerns for the consumers and the environment. The additive was also considered not to be skin irritant but was found to be a dermal sensitiser. The FEEDAP Panel could not conclude on the eye irritation potential of the additive. Owing to the proteinaceous nature of the active substance, the additive is considered a respiratory sensitiser. based on the tolerance studies provided, the Panel concluded that the additive is safe for the target species under the conditions of use with a wide margin of safety and therefore the conclusion were extended to suckling piglets and extrapolated to other minor pig species for fattening and to other minor reproductive pig species. The FEEDAP Panel concluded that the additive has the potential to be efficacious in weaned piglets, pigs for fattening and in sows at the level of 250 FTU /kg feed and this conclusion were extended to suckling piglets and extrapolated to other minor pig species for fattening and to other minor reproductive pig species.

热门相关

意 见 箱

匿名:登录

个人用户登录

找回密码

第三方账号登录

忘记密码

个人用户注册

必须为有效邮箱
6~16位数字与字母组合
6~16位数字与字母组合
请输入正确的手机号码

信息补充