接种VT菌剂堆肥过程中物理化学变化特征分析

Physical and Chemical Indexes of Composting Inoculated VT Microbes

通过2次对有机废弃物接种VT菌剂进行堆肥试验,测定堆肥中的温度、C/N比等物理化学指标的变化,研究了接种VT菌剂促进堆肥的作用机理。结果表明,降温阶段接种VT菌剂比空白处理温度下降缓慢,其温度高于空白处理的温度;接种VT菌剂的堆肥与空白处理相比pH值低,C/N降低的多,NO-3-N增加的多,而NH+4-N减少的少;接种VT菌剂能使堆肥温度增高,促进有机质的充分降解,缩短堆肥时间,加快堆肥腐熟,提高堆肥肥力。

Two composts were used in the experiment to study the effect of inoculating VT microbe on eomposting, one was produced by the chicken manure and the stalk spending 24days, and the other was from the chicken manure and the saw spending 36 days. There were two kinds of disposal methods： with or without inoculation of VT microbes. The physical and chemical indexes of composts inoculated 2‰ VT microbes, such as temperature. C/N ratio, pH values. NH4^--N, NO3^--N during eomposting process were determined in the compost, tile mechanisms of VT microbes in the compost accelerating composting process were analyzed, The results showed that inoculating VT microbes led to higher composting temperature, slower temperature decline in late mature period, lower pH values and C/N ratios, higher NO3^--N content and less NH4^＋-N loss compared with the treatment without inoculating VT, suggesting that inoculating VT microbes in the compost enhanced the activity of microbes and greatly deconlposed and used organic matter that caused higher temperature and lower C/N ratios. In the treatment of VT microbes, the lower pH values could reduce NH4^＋-N loss, thus preserved nitrogen. So inoculating VT microbes in eomposting process was effective to decompose organic matter, raise temperature, shorten composting time, speed eornposting and increase composting quality.