添加风化煤对蘑菇渣牛粪堆肥的影响

为研究风化煤的添加对菇渣牛粪堆肥的影响,找出合适的添加比例,添加质量分数分别为0、10%和20%的风化煤进行牛粪菇渣堆肥试验,对堆肥过程中温度、水分、pH、C/N等测定分析。结果显示,加入10%风化煤处理,堆体温度62h内即达到50℃以上,比不添加风化煤处理提前6d。堆肥结束时,3个处理有机碳含量下降43.78%、39.44%和40.27%;C/N下降38.56%、40.53%和41.31%。全氮含量分别减少29.55%、11.11%和11.27%;全钾含量增加19.8%、39.8%和33.7%;全磷含量变化不大。由于风化煤的加入,pH略有降低,而NH4+-N和NO3--N的含量变化不大。可见添加10%的风化煤可加快堆肥腐熟,降低氮素损失,增加钾的累积。

Influence of Applying Weathered Coal on Transformation Substance of Spent Mushroom and Cow Manure Composting

To find out the influence of adding weathered coal on composting of mushroom residue and cow manure,we conducted composting experiments with the cow manure and mushroom residue added 0,10% and 20% weathered coal,respectively,and determined changes of temperature,content of water,pH et al.The results showed that after applying 10% weathered coal,the pile temperature reached 50 ℃ in 72h,six days earlier than the treatment without addition of weathered coal.The organic content in three treatments decreased by 43.78%,39.44% and 40.27%,respectively and the C/N ratio declined by 38.56%,40.53% and 41.31%,respectively.Nitrogen content of the three treatments went down by 29.55%,11.11% and 11.27%,respectively.However,total potassium increased by 19.8%,39.8% and 33.7%,respectively,but the changes of total phosphorus were not clear.And changes of NH4+-N and NO3——N in the three treatments were the same.Applying 10% weathered coal would accelerate the composting process,decrease the loss of N,and increase the heap of K.