Research on availability as agricultural fertilizer of lake sediment in which a migratory bird comes flying

在随着候鸟飞行而导致富营养化的农业水池中，积累了粪尿来源营养盐的底泥处理是一个重要的问题。另一方面，如果这种底泥可用作农业肥料或甲烷发酵的底物，它将导致底泥加工或农业产出活动的成本降低。针对上述两点进行了室内试验，利用山形鹤冈市的青山神池和下池的底泥进行了试验。结果表明，按重量折算约7%混合泥沙，可获得几乎相当于习惯性化肥的效果。此外，在甲烷发酵中，通过调节温度环境，最大限度地获得了30%左右的甲烷可召回的结果。

In the cistern for agriculture which eutrophication is following by flying of the migratory bird, processing of sediment in which the nutrition salt of feces-and-urine origin was accumulated poses an important problem. On the other hand, if this sediment is utilizable as agricultural fertilizer or a substrate of methane fermentation, it will lead to sediment processing or cost mitigation of agricultural output activities. About the two above-mentioned points was conducted, the laboratory experiment which uses sediment of the Oyama-Kamiike pond and Shimoike pond at Tsuruoka-city, Yamagata. As a result, by mixing sediment about 7% by weight conversion showed that an effect almost equivalent to a habitual chemical fertilizer was acquired. Moreover, in methane fermentation, the result that about 30% of methane was callable was obtained at the maximum by adjusting temperature environment.