青岛市畜禽粪便排放量与肥料化利用潜力分析

在确定畜禽粪便年排放量和农田所需养分量估算方法的基础上,根据2011~2014年青岛市畜禽养殖量和农作物产量数据,估算青岛市畜禽粪便产生量及其主要养分含量和农田所需养分量,并从肥料化利用角度分析畜禽粪便资源化利用潜力及畜禽粪便中氮、磷养分的贡献率。结果表明,如果畜禽粪便能够完全实现肥料化利用,则畜禽粪便中养分的化肥替代率达60%以上,可见畜禽粪便肥料化利用潜力巨大;从青岛市各区的氮、磷养分贡献率可以看出,城阳区存在氮和磷污染风险,崂山区和莱西市存在磷污染风险。

ANALYSIS ON THE TOTAL AMOUNT OF DOMESTIC ANIMAL EXCREMENT AND THE POTENTIAL OF FERTILIZER UTILIZATION IN QINGDAO CITY

Based on the data of domestic livestock quantity and crop yield in Qingdao from 2011 to 2014 and the predefined estimation methods of the annual emissions of livestock excrements and nutrients amount that farmland demands, this paper estimated the animal manure production and its main nutrient contents and the nutrients amount that farmland demands in Qingdao city, and then analyzed the resource utilization potential of livestock excrements and the contribution rate of nitrogen and phosphorus in livestock excrements from the perspective of the fertilizer utilization. The results showed that if the livestock manure can be utilized as fertilizer completely, the average replacement rate of manure nutrient to fertilizer nutrient will be more than 60%, which meant the livestock manure had great recycling potential. From the contribution rate of nitrogen and phosphorus existing in livestock manure in Qingdao city, it indicated that Chengyangdistrict was in the risk of both nitrogen and phosphorus pollution, while Laoshandistrict and Laixicity had the risk of phosphorus pollution.