Nitrate leakage from deciduous forest soils into streams on Kureha Hill, Japan.
Nitrate leakage from deciduous forest soils into streams on Kureha Hill, Japan.
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DOI：
10.1100/tsw.2001.360
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发表时间：
2001-11-21
影响因子：
--
通讯作者：
Maehara I
中科院分区：
文献类型：
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作者：
Honoki H;Kawakami T;Yasuda H;Maehara I
研究了两个相邻丘陵地区落叶林土壤中硝酸盐渗漏到溪流中的情况。位于日本富山市的Kureha山上的许多溪流都含有极高的硝酸盐浓度。Kureha Hill支流Hyakumakidani的硝酸盐浓度平均为158 μeq l，在一段时间内达到470 μeq l。与此相反，与黑叶山相邻的Imizu山的溪流中硝酸盐浓度较低，低于15 μeq 1，即使在一个事件中，硝酸盐浓度也不超过75 μeq 1。两个地区具有相似的吹林土壤，O层C/N比，植被以落叶乔木为主。然而，4周的土壤培养试验表明，黑河山表层土壤的硝化速率远高于Imizu山表层土壤。
Nitrate leakage from deciduous forest soils into streams was investigated for two adjacent hills. Many of the streams on Kureha Hill, located in Toyama City, Japan, have extremely high nitrate concentrations. The nitrate concentration of Hyakumakidani, one of the streams on Kureha Hill, averaged 158 μeq l and reached 470 μeq l during an episodic event. In contrast, the streams on Imizu Hill, adjacent to Kureha Hill, had low concentrations, below 15 μeq l. Even during an episode, the nitrate concentrations increased to no more than 75 μeq l.Both areas have similar blown forest soils, C/N ratios in O horizons, and vegetation consisting primarily of deciduous trees. However, soil incubation experiments, which lasted for 4 weeks, revealed that the nitrification rates in the surface soils of Kureha Hill were much higher than in the soils of Imizu Hill.