一组复合菌发酵秸秆的理化效应及饲喂效果

采用人工培养及动物饲喂方法，研究了玉米秸秆粉经复合菌发酵后的变化及对鸡的饲喂效果。结果表明，玉米秸秆粉经一组复合微生物发酵后，电镜显示秸秆细胞壁结构受到破坏，原来致密、有序的组织结构被打乱，形成了大量的空洞。秸秆的主要成分纤维素、半纤维素和木质素分别下降了26．36％，43．30％和26．96％，粗蛋白提高了60．41％。动物饲喂实验表明，可以替代10％的原混合饲料，说明农作物秸秆经复合微生物发酵后，秸秆中与木质素交连在一起的纤维素和半纤维素游离出来，增加了细胞壁及胞内容物与微生物酶的接触机会，提高了农作物秸秆生物降解效率，提高了秸秆的营养价值，有利于动物的消化吸收。

The physic-chemical Characters and Feeding Effect of Fermented Straw by a Composite Fungi System

The change of corn straw powder and its feeding effects after fermented by a composite fungi system were studied through artificial culture and feeding test. The micro- electric photo showed that the cell wall structure of straw changed and the structure of compact tissue was destroyed and a lot of inanition formed after corn straw powder was fermented by a composite system. The main components of corn straw, cellulose, hemi- cellulose and lignin decreased 26.36% , 43.30% and 26.96% , respectively, while the crude protein content increased 60.41% . Feeding test indicated that 10% of primitive mixed forage could be replaced by the fermented straw, which suggested that, through bio- degradation by a composite fungi system, the cellulose, hemi- cellulose of straw could be separated from lignin efficiently so that the cell wall and content of cell had more chance to meet microbial enzymes, which increased the bio- degradation efficiency and nutrient value of straw and was favorable for the animal digestion of corn straw.