Annual nitrogen leaching to subsurface drainage water from a clayey aquic soil cultivated with onions in Hokkaido, Japan
Annual nitrogen leaching to subsurface drainage water from a clayey aquic soil cultivated with onions in Hokkaido, Japan
复制标题
日本北海道种植洋葱的粘质水土中每年氮淋滤至地下排水
DOI：
10.1080/00380768.1999.10409359
复制
发表时间：
1999
影响因子：
2
通讯作者：
R. Hatano
中科院分区：
文献类型：
--
作者：
Yasuhito Hayashi;R. Hatano
摘要研究了洋葱（AlliumcepaL.）在日本北海道的一个粘性潮土中有地下排水的田地。洋葱植株在1996年5月初移植，9月底收获。在一年中，排水流量是自动测量的，几乎每周都会对排水进行采样。在排水中的硝酸盐浓度平均约10毫克N L-1。在生长季节（5月至9月）和休耕季节（10月至2月），它增加了增加排水，并在融雪季节（3月至4月），它减少了增加排水。利用排水流量与排水中氮素浓度的关系，计算了氮素的年淋溶量。我们发现，179公斤氮公顷-1的淋溶，相当于58%的施氮。植物吸收的氮量为133 kg ha-1，相当于施用氮的43%。从1996年收获到1997年4月，95公斤N ha-1。
Abstract We studied the annual nitrogen leaching from an onion (Allium cepa L.) field with subsurface drainage in a clayey aquic soil in Hokkaido, Japan. Onion plants were transplanted early in May and harvested at the end of September in 1996. Throughout a year, the drain flow was measured automatically and the drainage water was sampled almost weekly. The nitrate concentration in the drainage water averaged about 10 mg N L-1. In the growing (May to September) and fallow (October to February) seasons, it increased with increasing drainflow, and in the snowmelt (March to April) season, it decreased with increasing drainflow. The amount of annual leached nitrogen was calculated by using the relationship between the drain flow and nitrogen concentration in the drainage water. We found that 179 kg N ha-1 was leached, corresponding to 58% of applied nitrogen. The amount of nitrogen taken up by the plant was 133 kg ha-1, corresponding to 43% of applied nitrogen. From harvest in 1996 to April 1997, 95 kg N ha-1...