Makoto OHMINE
Examination of Fertilizer Effect and Safety at Phosphate Fertilizer Made from Incinerator Ash of Sewage Sludge on Real Scale
Toshiya KOMATSU , Shuji HIMENO
Phosphorus is valuable exhaustion resources. Using incinerator ash of sewage sludge as substitute of phosphate rock is important process for creating the Recycling-Based Society. In this study,we understood the influence that slag fertilizer exerted on crops(white radish,corn) grown in field made by us and this field's soils,and examined whether slag fertilizer was able to be applied in a real environment.
The result of content tests on each crops confirmed safety because the heavy metals were below the Food Sanitation Law allowance cap,and indicated that main nutrients secure constancy necessary amount by an absorption factor and a concentrated rate change. There were accumulative amounts to the soils only a little because the heavy metals in slag fertilizer hardly did not leach to the soils.
It was indicated slag fertilizer be to apply from a variety of analysis results in a real environment.
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