不同堆沤方式对蚕沙部分理化指标动态变化的影响  

Effects of Different Stockpile Methods on Dynamic Changes of Partial Physical and Chemical Indexes of Silkworm Excrement

作　　者：陈芳艳[1] 钟杨生[1] 李文楚[1] 王叶元[1] 马冲[1] 林健荣[1] 

机构地区：[1]华南农业大学动物科学学院,广东广州510642

出　　处：《华南农业大学学报》2013年第4期598-601,共4页Journal of South China Agricultural University

基　　金：现代农业产业技术体系建设专项(CARS-22)

摘　　要：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 ex-crement composted in open stockpile and close stockpile during different periods , were studied .The re-sults 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%.

关 键 词：蚕沙 堆沤 理化指标 

分 类 号：S886.9[农业科学—特种经济动物饲养] X705[农业科学—畜牧兽医]