Corn - soybean meal diet was fermented by mixed strains via solid state fermentation to remove the anti - nutrient factor. The results showed that antigen proteins in fermented feed were degraded sharply. The relative molecular weight of proteins after fermentation were gathered below 18 kDa,and peptides below 5 kDa were increased from 1. 35% to 3. 60% accordingly the protein digestibility in vitro was increased 4.0%. Besides, raffinose family oligosaccharides were degraded thoroughly, while the starch content decreased 3.5% ,the amylose increased 4.13% ,organic acids content including lactic acid reached to 2.78% ,and the pH decreased to 4.43.%对玉米-豆粕型日粮进行混菌固态发酵,以去除其中的抗营养因子.研究结果表明,发酵饲料的抗原蛋白发生了大幅的降解,发酵后蛋白质相对分子质量主要集中在18 kDa以下,小于5 kDa的小分子肽含量从发酵前的1.35％提高到了3.60％,蛋白质的体外消化率提高了4.0个百分点.发酵饲料的棉子糖家族寡糖被彻底降解,其淀粉含量降低了3.5个百分点,直链淀粉含量提高了4.13个百分点,有益的代谢产物乳酸等有机酸的含量达到2.78％,pH下降至4.43.
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