不同处理方法提高反刍动物对粗饲料纤维消化力的机理研究
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摘要
由于哺乳动物消化腺分泌的淀粉酶不能作用于纤维β-1,4-糖苷键,因此其本身不能直接利用纤维,加之细胞壁结构独特性,这是限制纤维消化的根本原因。真菌和细菌能分泌纤维素分解酶,故在动物消化道内共生的微生物中有许多纤维素酶可以起作用。在保障反刍动物体质和生产性能不下降的情况下,运用科学、合理的处理方法增加反刍动物饲料日粮中纤维消化率是有效降低畜牧养殖业生产成本,充分利用粗饲料资源的有效途径。
Since the amylase secreted by the digestive gland of mammals cannot act on the β-1,4-glycosidic bond of the fiber, it cannot directly utilize the fiber itself. Furthermore, the uniqueness of the cell wall structure is the root cause of fiber digestion.Fungi and bacteria secrete cellulolytic enzymes, so many cellulases can work in microorganisms that are symbiotic in the digestive tract of animals. Under the premise of not affecting the health and production performance of ruminants, improving the digestibility of dietary fiber by reasonable treatment methods is an effective way to reduce the production cost of animal husbandry and make full use of roughage resources.
Since the amylase secreted by the digestive gland of mammals cannot act on the β-1,4-glycosidic bond of the fiber, it cannot directly utilize the fiber itself. Furthermore, the uniqueness of the cell wall structure is the root cause of fiber digestion.Fungi and bacteria secrete cellulolytic enzymes, so many cellulases can work in microorganisms that are symbiotic in the digestive tract of animals. Under the premise of not affecting the health and production performance of ruminants, improving the digestibility of dietary fiber by reasonable treatment methods is an effective way to reduce the production cost of animal husbandry and make full use of roughage resources.
引文
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[2] Ho Y.W.Abdullah N.Jalaudin S.Colonization of guinea grass by anaerobic rumen fungi in swamp buffalo and cattle [J].Anim.Feed Sci Technol,1988.22:161-171.
[3] Weimer P.J.Microbial and mokecular mechanisms of cell wall degradation-session synopsis[M].1993:485-497.
[4] Borneman W.S.,Hartley R.D.,Morrison W.H.,et al.Feruloyl and p-coumaroyl esterase from anaerobic fungi in relation plant cell wall degradation[J].Appl.Microbiol.Biotechnol,1990,33:345-352.
[5] Kudo H.,Cheng K.J.,Costerton J.w.Interactions between Treponema bryanti and celluloytic bacteria in the in vitro degradation of straw cellulose[J].Call.J.Microbiol,1986,32:244-248.
[6] 郭蔼光.基础生物化学[M].北京:高等教育出版社.2001.
[7] 冯仰廉,张子仪.低质粗饲料对反刍动物的营养价值及合理利用[J].中国农业科技导报.2003,5(3):8-12.
[8] 汪水平,王文娟,谭支良.瘤胃纤维降解的研究进展[J].家畜生态学报.2006,27(6):5-8.
[9] 安鹃,赵小刚.影响反刍动物对纤维素消化利用的几种因素[J].饲料工业.2005,26(2):21-24.
[10] 郭艳丽,李发弟,郝正里.果胶在动物营养中的研究进展[J].营养与饲料.2006,33(1):10-12.
[11] 冯仰廉.反刍动物营养学[M].北京:科学出版社.2001.