采用开放式和封闭式2种方式进行蚕沙堆沤,测定了堆沤过程中蚕沙各理化指标(含水率、温度、pH、有机碳、氮、磷、钾、腐殖酸以及发芽指数)的动态变化.结果表明：50 d的堆沤进程中,封闭式堆沤发酵温度低、发酵速度慢,各时期理化指标变化平稳；开放式堆沤经历2次升温期,第1次温度高（50 ℃以上持续9 d）,第2次温度低,温度对各个时期理化指标的波动造成较大影响;蚕沙经过20 d的开放式堆沤可基本达到有机肥的技术标准,蚕沙有机碳质量分数为352.41 g/kg,w(C)/w(N)为11.01,总养分(N + P2O5 + K2O)质量分数为81.2 g/kg, pH 7.14,发芽指数>50%.
Changes of partial physical and chemical indexes, including moisture percentage, temperature, pH, organic carbon, nitrogen, phosphorus, potassium, humus acid, germination index of silkworm excrement composted in open stockpile and close stockpile during different periods, were studied. The results showed that when the fermentation temperature was low, fermentaion rate was slow, but physical and chemical index were stable in close stockpile while there were two heating up periods in open stockpile, the first high temperature was 50 ℃ for 9 d, the second with low temperature, which created great effects on physical and chemical indexes. It basically reached the technical standards of organic fertilizer after 20 d open compost. The content of organic carbon in silkworm paeces dropping ran up to 352.41 g/kg,w(C)/w(N) being 11.01, the total nutrient content (N + P2O5 + K2O) being 81.2 g/kg, pH being 7.14, germination index surpassing 50%.