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蘑菇渣与落叶联合堆肥过程中养分变化的研究

Keywords: 落叶,蘑菇渣,堆肥,养分变化

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Abstract:

以落叶、蘑菇渣和鸡粪为原料,在长45.5cm、直径31.0cm的圆柱形堆肥仓内,采用间歇式强制通风方式,进行为期44d的堆肥试验。试验设未灭菌蘑菇渣与落叶联合堆肥和灭菌蘑菇渣与落叶联合堆肥2个处理,研究蘑菇渣中的微生物对落叶堆肥过程中养分变化的影响以及蘑菇渣与落叶联合堆肥过程中养分的变化情况。结果表明,在通风量为0.20m3.h-1、通风时间为20min.h-1的条件下,处理一(添加高温灭菌的蘑菇渣)和处理二(添加未高温灭菌的蘑菇渣)在堆肥11h后分别达到52.0℃和52.5℃的高温,并且分别保持50℃以上达77h和72h;添加未经高温灭菌的蘑菇渣可以加快落叶中有机质的降解,降低堆肥C/N,提高钾的积累,加快中木质纤维素的降解速度,表现为在堆肥结束时,处理二的筛过率较处理一高7.84%;蘑菇渣对落叶堆肥过程温度、水分、总氮、总磷、挥发性固体、pH、NH4+-N和NO3--N的影响不大。因此,添加未灭菌的蘑菇渣对落叶堆肥有促进作用,但对堆肥过程中的养分变化影响不大。

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