The improvement of the nitrogen removal capacity in wetlands
The improvement of the nitrogen removal capacity in wetlands
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DOI：
10.5004/dwt.2010.1907
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发表时间：
2010-07-01
影响因子：
1.1
通讯作者：
Suwa, Y.
中科院分区：
文献类型：
--
作者：
Kuroda, H.;Kato, T.;Suwa, Y.
我们正在研究湿地（稻田）的脱氮功能。我们调查的地点受到过度使用氮肥和动物粪便的旱田含氮地下水的污染。 2006年至2008年，我们进行了一项旨在提高这些田地净化能力的实验。使用了两个试验地块。自1991年以来，这两个试验地块都是无植被地块。隧道地块的温升效应高于露天地块。通过自动记录温度计每隔 1 小时观察一次温度。隧道区的平均温度为 18±9 摄氏度，露天区的平均温度为 16±6 摄氏度。露天小区平均脱氮量为5 574 kg ha(-1) y(-1)，隧道小区平均脱氮量为661 8 kg ha(-1) y(-1)。隧道小区脱氮量达到比露天小区大104 4 kg ha(-1) y(-1)的水平，这意味着隧道小区的热效应高于露天小区。露天小区8月份反硝化与厌氧氨氧化活性比为5:1，隧道小区无厌氧氨氧化活性
We are studying the nitrogen removal function of wetlands (rice paddy fields) The site of our investigation was polluted by nitrogen ground water from upland fields in which nitrogen fertilizer and animal manure were overused. We carried out an experiment with the aim of improving the purification capacity of these fields from 2006 to 2008 Two test plots were used Both had been non-vegetation plots since 1991 A temperature rise effect was higher in the tunnel plot than in the open-air plot. Temperatures were observed at 1-h intervals by automatic record thermometers The average temperatures were 18 9 degrees C for the tunnel plot and 16 6 degrees C for open-air plot. The average amount of nitrogen removal was 5574 kg ha(-1) y(-1) in the open-air plot and 661 8 kg ha(-1) y(-1) in the tunnel plot The amount of nitrogen removal in the tunnel plot reached a level 104 4 kg ha(-1) y(-1) larger than the open-air plot This means that the thermal effect of the tunnel plot was higher than in the open-air plot. The denitrification and ANAMMOX activity ratio in August was 5 1 in the open-air plot, but there was no ANAMMOX activity in the tunnel plot