断奶对仔猪肠道屏障的影响及营养调控

在集约化养殖中,3~4周龄早期断奶是仔猪生命周期中一个非常紧张的时期,此时仔猪胃肠道还未发育成熟。肠道屏障由上皮、免疫和肠神经系统组成,这些系统控制上皮屏障的完整性以及肠道功能,包括肠腔营养物质、水和电解质的运输。早期断奶导致肠道通透性增加,出现胃肠功能紊乱的情况,可能对猪只一生产生长期的影响。因此,仔猪断奶饲粮需要正确水平的营养素、营养源和高质量的添加剂,鼓励仔猪快速进食,减轻或消除断奶应激综合症,降低死亡率和发病率。养猪就是养"肠道",合理使用功能性氨基酸、植物化学物质和有机酸等添加剂,能够修复由于断奶应激综合症导致的肠道屏障功能障碍。

Effect of weaning on gut barrier and nutrition regulation in piglets

In intensive farming,weaning at the early age of 3-4 weeks is a very tense period in the life cycle of piglets,when the gastrointestinal tract of piglets is not mature yet.The gut barrier is composed of the epithelium,immune system and gut nervous system,which control the integrity of the epithelium barrier and intestinal function,including the transport of nutrients,water and electrolytes in the gut cavity.Early weaning leads to the breakdown of these intestinal functions,increased permeability and gastrointestinal dysfunction,which may have a long-term impact on the life of pigs.Therefore,weaning diets of piglets need the right nutrients,nutrition sources and high quality additives to encourage piglets to eat quickly,relieve or eliminate weaning stress syndrome,and reduce mortality and incidence rate.To raise pigs is to keep guts in good health.Rational use of functional amino acids,phytochemicals,organic acids and other additives can repair the intestinal barrier dysfunction caused by weaning stress syndrome.