不同发酵条件对玉米秸粉高温发酵的影响

Effect of Some Conditions on Fermentation of Maize Stem Dust

以玉米秸粉为发酵原料,在半封闭的发泡聚苯乙烯保温箱内,控制发酵原料总含水量60％,研究了不同碳氮比(C／N)、不同氮源及配比、不同通风控温范围及不同EM菌添加量对发酵温度的影响。结果表明:以烘干鸡粪为氮源, C／N 30:1的处理,前期发酵升温快,高温持续时间长;尿素+硫酸铵+烘干鸡粪的处理升温最快;55-60℃的通风控温范围能有效延长高温发酵时间;添加EM菌对提高发酵初期的温度有一定作用,但最高发酵温度与对照相近。

The fermented material was maize stem dust adjusting 60% of water content in the total materials and the fermenting containers were 60 cm × 40 cm × 40 cm boxes made by expanded polystyrene in this experiment. The influence of carbon/nitrogen（C/N）, different nitrogen resources and ratios, temperature ranges of ventilation and quantities of Effective Micro-organism（EM） on temperature of hot fermentation were determined. The results showed that C/N 30 ： 1 was a good treatment respectively which temperature increased fast than that the others at the early stage of the fermentation and the period of time at the high temperature was longer. The temperature increasing rate of the treatment with nitrogen resource of urea ＋ ammonium sulfate ＋ dry manure of chicken was the most fast treatment among the 5 treatments. The high temperature of fermentation could be kept for a long period of time by ventilating with the temperature ranges of 55 - 60 ℃. There was an increasing effect to the temperature of fermentation at the early stage and the most high temperature was near to the contrast by adding the EM into the materials.