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以板栗苞和牛粪为原料,在北京市密云板栗生态园中进行了为期40d的高温好氧堆肥。板栗苞取自密云水库库区板栗生态园,牛粪取自周边养牛场的奶牛粪便,初始混合物料C/N为25～30,含水量在55%～60%,采用人工翻堆的方法进行通风。结果表明,由于板栗苞与牛粪都是木质纤维素含量较高的物料,所以在堆制结束时,堆肥中的粗纤维含量仍有10.11%,整个过程中粗纤维降解率为57.25%。水溶性硝态氮在堆肥过程中总体呈上升趋势,而铵态氮损失比较严重,比初始物料减少了33.30%。在堆肥结束时,C/N基本稳定在20左右。在堆制20d后,发芽指数(GI)已上升到了80%以上。说明板栗苞和牛粪堆肥40d后基本可以达到腐熟,但堆肥中仍残存部分有形的板栗苞,需进一步采取措施促进板栗苞中木质纤维素的降解。
Taking chestnut bract and cow dung as raw materials, a high-temperature aerobic composting of 40 days was carried out in Miyun Chestnut Ecological Park in Beijing. Chestnut buds are taken from the Chestnut Ecological Park in Miyun Reservoir Area. Cow dung is taken from cow dung of surrounding cattle farms. The initial mixed material C / N is 25-30 and the water content is 55-60% Ventilate. The results showed that the content of crude fiber in composting was still 10.11% at the end of composting, and the degradation rate of crude fiber in the whole process was 57.25%, because chestnut bract and cow dung all had high contents of lignocellulose. In the process of composting, the water-soluble nitrate nitrogen generally showed an upward trend, while the ammonium nitrogen loss was more serious, which was 33.30% less than the initial material. At the end of composting, C / N was basically stable at around 20%. After 20 days of composting, germination index (GI) has risen to more than 80%. It indicated that the compost could be decomposed 40 days after chestnut bud and cow dung compost, but some of the chestnut bud still remained in the compost, and further measures should be taken to promote the degradation of lignocellulose in chestnut bud.