牛粪与稻草混合堆肥理化性质转变特征

以奶牛粪便和稻草秸秆为原料,进行高温好氧堆肥过程中物料理化特性转变的研究。研究结果表明,堆肥物料先后经历了升温期、高温期和降温期。高温阶段堆体温度达到57℃,高温期维持9d;经降温期充分腐熟,堆肥物料中的有机质含量明显降低。堆肥过程结束后,堆肥产品中的TN、NO3--N、TP和速效磷等含量均有增加,增幅分别为22.45%、41.46%、68.98%和13.60%;堆肥物料中营养元素的植物利用有效性得到提高。经过高温好氧堆肥处理后,牛粪可实现无害化、稳定化和资源化。

Conversion of physical and chemical characteristics of a mixture of dairy manure and rice straw during composting process

With the mixture of diary manure and rice straw as the raw material, the conversion of physical and chemical characteristics of it during the composting process under high temperature and aerobic condition was studied. The results showed that, the composting pile had experienced warming, high temperature and cooling periods. During high temperature stage, the temperature of the composting pile reached 57 ℃, and had been maintained for 9 days; the organic matter content of the compost materials was significantly reduced after the cooling period in which the pile was fully matured. At the end of the composting process, the content of TN, NO3--N, TP and available phosphorus in the compost product increased by 22.45% 、 41.46% 、 68.98% and 13.60% respectively; therefore, the availability of nutritional elements of the compost materials for plants growing was improved. It could draw a conclusion that, through the composting process under high temperature aerobic condition, the sterilization, stabilization and resource utilization of dairy manure could be achieved.