酒糟型生物有机肥降解过程中水溶物含量的变化

On content variations of water solubles in the process of degradation of brewer's spent grains-based bio-organic fertilizer

研究了酒糟型生物有机肥酵解过程中几种水溶物含量的变化．结果表明，pH值呈先下降后上升的趋势，变幅在6～9．添加不同外源微生物菌剂对堆体pH值的影响差异不显著．电导率（EC）呈先上升后下降的变化趋势，在整个酵解过程中EC值均小于4．0ms／cm．腐殖酸OD465nm／OD665nm（E4／E6）值前期增大，后期呈动态变化，堆制结束时维持在2．06～2．14．水溶性铵态氮（NH4^＋-N）含量呈先上升后下降的趋势，水溶性硝态氮（NO3^--N）含量呈上升趋势，堆制结束时NH4^＋-N、NO3^-N含量比为0．91左右．水溶性碳（WSC）含量呈先上升后下降的趋势，水溶性氮（WSN）含量呈下降趋势，WSC、WSN含量比呈先上升后下降的趋势，到堆制结束时变幅在4-6，达到了腐熟要求．

Content variations of water solubles in the process of degradation of brewer＇s spent grains-based bio-organic fertilizer has been studied in. The results showed that pH was showing a tendency, rise first and then decrease, within the range of 6-9; EC rose first then decreased with its value being less than 4.0 ms/cm in the whole process; E4/E6 appeared to be upward first, then maintained dynamic changes, with its value at 2.06-2.14 at the terminal of the composting; NH4^＋-N rose first then decreased, NO3^--N showed an upward trend, the rate of NH4^＋-N to NO3^--N was about 0.91; water-soluble C rose first then decreased, water-soluble N showed twists and turns, the rate of water-soluble C to water-soluble N first rose then fell to 4-6 at the terminal of the composting, which could meet the requirements of maturity.