冬季低温环境下牛粪堆肥参数动态研究

采用条垛式堆肥法,研究冬季低温环境下牛粪堆肥参数动态变化,以便合理优化牛粪条垛式堆肥生产工艺。结果表明,堆体温度上升很快,在第6d达到50℃,翻堆后,第11d达到60℃;总碳含量呈缓慢下降趋势,从开始53%持续降低到26%,损失达50%;氮含量也持续降低,从开始约18.4g/kg降到13.2g/kg,总氮减少30%左右;堆体碳氮比(C/N)逐渐下降,从开始的28%左右,逐渐下降到19%左右,达到腐熟要求。试验表明牛粪堆肥后,有较好的腐熟度,且堆肥种子发芽率呈上升的趋势,表明堆肥中有害毒素逐渐消除,堆肥的腐熟度逐渐增加。

Dynamic research on parameters of cattle manure composting under winter low-temperature environment

In order to optimize windrow composting manure production process, windrow composting experiment using cattle manure and straw was carried out to study the dynamic changes of parameters under winter low--temperature environment. The results showed that the temperature of compost increased quickly and reached 50℃ on the 6th day, the temperature reached 60℃ on the llth day after turning; the content of total carbon decreased slowly and from 53% to 26%, the total carbon losses was about 50% ; the content of total nitrogen decreased from 18.4 g/kg to 13.2 g/kg, the total nitrogen losses was about 30%; the C/N decreased from 28% to 19%, the composting production achieved the decomposed requirement. Besides, the germination rates showed a decreasing trend in germination experiments ,it indicated that the harmful toxins gradually eliminate, the compost maturity increased gradually.