干酵母的营养宜昌安琪酵母.pptVIP

活性干酵母在养猪中的应用效果王学东 博士武汉工业学院安琪酵母股份有限公司 饲用高活性干酵母 主要内容一酵母与猪的微生态学二三酵母微生态制剂在养猪上的研究进展四酵母在养猪上的应用效果实例酵母制剂在养猪上的应用前景展望 微生态学的发展与进步 猪消化道菌群的基本特点 酵母应用于养猪保健的基本原理双歧杆菌（丽珠肠乐）;整肠生（芽孢杆菌）；乳酸菌发酵饮料等。 猪消化道菌群的基本特点 动物消化道菌群中性菌（条件致病菌）有益菌有害菌对动物健康有益处，双歧杆菌、乳酸杆菌等，主要为厌氧菌。大肠埃希氏菌和葡萄球菌等，多为好氧菌。在机体正常情况下，该菌为有益菌，在机体衰退、发生疾病时该菌转换为有害菌，如某些肠杆菌。 活性干酵母作用机理酵母属于兼性厌氧菌，在消化道内代谢耗氧，抑制大肠杆菌、沙门氏菌等有害菌群的生长繁殖，促进双歧杆菌、乳酸菌等有益菌的繁殖。酵母代谢产生有机酸，降低胃肠道pH值，提高饲料消化率。酵母菌自身营养丰富，蛋白质和B族维生素含量高。 酵母与猪消化道有益菌群的关系栖生（commensalism）或叫单利共生，是指两种微生物同时生长时，一方受益，而另一方不受任何影响。对收益者来讲，另一方可能为其提供一些基本的生存条件，但它还能从其它方面获得这些条件；另一方来说，即不从中受益，也不会受到损害。兼性厌氧菌和专性厌氧菌是栖生关系的典型例子。 主要内容一酵母与猪的微生态学二三酵母微生态制剂在养猪上的研究进展四酵母在养猪上的应用效果实例酵母制剂在养猪上的应用前景展望 断奶仔猪应用活性酵母，可以使肠道更健康，缓解肠粘膜变薄的问题。并可能会增强仔猪的抗感染能力。 Biological diversity of yeasts in the gastrointestinal tract of weaned piglets kept under different farm conditions.FEMS Yeast Research; Dec2008, Vol. 8 Issue 8, p1349-1356, 8p, 2 charts, 2 diagrams, 1 graph, 1 colorThe study was conducted to determine yeasts present in the gastrointestinal tract (GIT) of piglets kept under experimental farm (EF) and commercial farm (CF) conditions. Ninety five German Landrace full- and half-sibling piglets were sacrificed at 39 days of age. Sixty eight piglets were weaned at 28th day of life, when they were offered one diet ad libitum. Twenty seven piglets remained unweaned by their dams. None of the piglets received any creep feed before weaning. Digesta samples were collected from 1/3 distal small intestine (SI), caecum and proximal colon. One hundred seventy three colonies of isolated yeasts were characterized by sequence analysis of the PCR-amplified D1/D2 domain of the 26S rRNA gene with following alignment of the recovered sequences to GenBank entries. From the 17 phylotypes found, isolates most closely related to Galactomyces geotrichum, Kazachstania slooffiae and Candida catenulata dominated in the GIT of CF piglets. Kazachstania slooffiae and Candida glabrata dominated in GIT of EF piglets. S?renson and Morisita-Horn similarity indices between farms