The nitrogen concentrations in the upper reaches of the Yoshida River located the Sanuki Mountain Range
| Autor: | Nakashima, Sachi, Yamada, Yoshihiro, Tada, Kuninao |
|---|---|
| Jazyk: | japonština |
| Rok vydání: | 2007 |
| Předmět: | |
| Zdroj: | 香川大学農学部学術報告. 59(122):65-69 |
| ISSN: | 0368-5128 |
| Popis: | application/pdf n the upper reaches of the Yoshida River where the nitrogen concentration in headwaters was high, the distribution of nitrogen and major ions were clarified. About 70% of total nitrogen was NO₃⁻‐N. NO₃⁻‐N was the highest concentration of 2.1mg/l in headwaters. Its concentrations in the down stream in the investigation area were about 1mg/l. The major ion concentrations showed the reverse tendency with NO₃⁻‐N. NO₃⁻‐N was higher, as the forest rate in the catchment was higher. This result shows that in the upper reaches of the Yoshida River, the nitrogen load from the forest had a greater impact on nitrogen concentration of the river. |
| Databáze: | OpenAIRE |
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