共查询到16条相似文献，搜索用时 796 毫秒
1.
2.
在生猪产能恢复中,需要特别关注猪只肠道健康问题。很多营养素与猪的肠道健康密切相关,其中日粮纤维就是影响猪只肠道健康的重要营养素之一。日粮纤维在调节猪肠道微生态环境方面表现出异常活跃的营养学功能。日粮中适宜的纤维水平可改善猪肠道微生物种群多样性,调节菌群结构组成,维持猪肠道微生态平衡,提高饲料转化率,具有促进猪只的生长发育以及预防疾病的功效。文章综述了日粮纤维的构成及营养学功能、对猪肠道的主要作用机制以及对猪肠道微生态环境的影响研究,旨在为进一步探究日粮纤维在猪生产实践中的研究应用提供理论借鉴。 相似文献
3.
猪只日粮中添加纤维会在一定程度上降低营养物质的吸收效率,但是饲粮纤维可在猪只肠道后端进行一定程度的发酵,并产生大量的挥发性脂肪酸,具备了一定的营养作用。同时,也因此而降低猪只肠道pH,影响肠道菌群丰度及菌群结构。通过改变纤维日粮的组成来影响肠道中的菌群,发挥肠道上皮屏障功能,并且通过调节肠道微生物的组成来维持肠道微生物生态的稳定,是猪只肠道健康的关键控制点。肠道菌群与宿主相互协同,构成了肠道微生态系统,能够促进猪只对营养物质吸收利用。文章综述了不同纤维源日粮对猪只肠道菌群的影响,为养猪生产实践中应用不同纤维源提供一定理论依据。 相似文献
4.
5.
一、简介猪饲养营养界有研究显示,颗粒饲料可提高增重速度、改善饲料转化效率,但会增加猪只腹部的不饱和脂肪酸,高纤维日粮比玉米大豆为主要成分的日粮对腹部脂肪的碘值升高效果更明显。宰前停用高纤维饲料可解决饲喂高纤维日粮导致的屠宰率降低现象,但对猪只腹部脂肪碘值升高现象只能部分缓解。日粮形式与纤维饲料的使用策略这两大因素对生长育肥猪生长性能的影响却鲜有研究,本试验拟在这方面进行探究,以期对饲料使用者有所帮助。 相似文献
6.
7.
8.
9.
10.
11.
生物发酵饲料作为"第四代活的饲料",近年来备受畜牧行业的关注,也是国家实行饲料全面禁抗后的替抗研究手段之一。生物发酵饲料立足于去除原料抗营养因子、改善饲料营养价值、提高饲料养分消化利用率、产生有益微生物代谢产物,达到维护动物肠道健康、提升动物机体免疫力、促进动物生产性能、减少动物粪污排放和环保健康养殖的目的。生物饲料在养猪生产上应用最早、也最为广泛,从早年欧洲家庭农场的液体发酵饲喂,到近年来发酵原料、益生活菌及其代谢产物在猪饲料上的使用,都取得了成功实践。文章就生物发酵饲料的概述、其替抗的作用机理及其在生猪养殖上的研究进展进行综述,为生物发酵饲料的广泛应用提供参考依据。 相似文献
12.
饲粮纤维影响猪肠道健康的研究进展 总被引：2，自引：0，他引：2
肠道健康包括有效的营养物质吸收、稳定的肠道微生物群落及健全的免疫功能等多个方面。肠道的健康状况决定了动物的健康状况。肠道健康取决于饲粮、肠道黏膜和肠道微生物群落3个主要方面。饲粮纤维是由纤维素、半纤维素、果胶和木质素等组成的成分和结构复杂的混合物,具有改善肠道营养物质吸收、降低肠道环境p H、改变有益菌与潜在致病菌比例、优化肠道微生物群落组成及加强黏膜屏障作用等功能。来源不同和理化性质相异的饲粮纤维对肠道健康的影响及作用机理并不一致。本文就饲粮纤维的分类、理化性质及其对肠道健康影响的研究进展进行综述,以促进饲粮纤维在猪饲粮生产上的进一步广泛合理利用。 相似文献
13.
14.
Jan Erik Lindberg 《畜牧与生物技术杂志(英文版)》2014,(3):273-279
Dietary fiber is associated with impaired nutrient utilization and reduced net energy values. However, fiber has to be included in the diet to maintain normal physiological functions in the digestive tract. Moreover, the negative impact of dietary fiber will be determined by the fiber properties and may differ considerably between fiber sources. Various techniques can be applied to enhance nutritional value and utilization of available feed resources. In addition, the extent of fiber utilization is affected by the age of the pig and the pig breed. The use of potential prebiotic effects of dietary fiber is an attractive way to stimulate gut health and thereby minimize the use of anti-microbial growth promoters. Inclusion of soluble non-starch polysaccharides （NSP） in the diet can stimulate the growth of commensal gut microbes, inclusion of NSP from chicory results in changes in gut micro-environment and gut morphology of pigs, while growth performance remains unaffected and digestibility was only marginally reduced. The fermentation products and pH in digesta responded to diet type and were correlated with shifts in the microbiota. Interestingly, fiber intake will have an impact on the expression of intestinal epithelial heat-shock proteins in the pig. Heat-shock proteins have an important physiological role in the gut and carry out crucial housekeeping functions in order to maintain the mucosal barrier integrity. Thus, there are increasing evidence showing that fiber can have prebiotic effects in pigs due to interactions with the gut micro-environment and the gut associated immune system. 相似文献
15.
Dietary fiber (DF), divided into soluble dietary fiber (SDF) and insoluble dietary fiber (IDF), has attracted increasing attention in the field of pig nutrition. Although DF reduces nutrient digestibility and inhibits energy deposition in most cases, fiber-rich feeds have been widely used in pig diets. This is not only because of lower feed costs, but also from the continuous discovery about the nutritional value of DF, mainly including the improvement of piglet intestinal health and sow reproductive performance. The addition timing has also been further considered, which potentially enables the nutritional value of DF to be accurately used in applicable pig models. Furthermore, fiber degrading enzymes have been shown to alleviate the anti-nutritional effects of DF and have ensured the improvement effect of fiber on intestinal health in young piglet models. However, the regulatory effect of fiber on pork quality is still unclear, which requires consideration of the wide range of fiber sources and the complexity of the basic diet composition, as well as the impact of pig breeds. Taken together, future research needs to gain more insight into the combined effects of SDF and IDF, processing methods, and addition timing to improve the nutritional value of DF, and further explore the physiological functions and regulatory mechanisms of DF fermentation products short-chain fatty acids in pigs. 相似文献