玉米秸秆乳酸发酵残渣制取饲料的研究

Journal of Natural Science of Heilongjiang University(2008)

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Abstract
以玉米秸秆乳酸发酵残渣为研究对象,探讨其酵母发酵制取饲料的可行性。通过菌种对比实验,选取啤酒酵母为最优发酵菌种。探讨了发酵时间、温度、初始pH、接种量及氮源、碳源等因素对酵母发酵的影响。结果表明最佳发酵条件为温度35℃,初始pH为6.0,接种量10%,发酵24h。若添加由2∶1的尿素和硫酸铵构成的0.35%的氮源及30%糖蜜为碳源,可使粗蛋白含量由发酵前的9.2%提高到发酵后的14.5%,提高幅度为57.6%。而该残渣饲料的粗纤维含量降低,可作为较好的牛羊饲料。
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Key words
molasses,corn-straw,optimum condition,yeast,animal feed,residue of fermentation lactic acid
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