| Losses of nitrate-nitrogen from a wheat-Corn rotation in north China |
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| DOI：10.7606/j.issn.1000-7601.2006.06.02 |
| Key Words: nitrate-nitrogen leaching water balance |
| Author Name | Affiliation | | LI Xiao-xin | Center for Agricultural Resources Research Institute of Genetic and Developmental Biology CAS,Shijiazhuang, Hebei 050021,China；Research Center for Eco-Environmental Sciences CAS,Beijing 100085,China | | HU Chun-sheng | enter for Agricultural Resources Research Institute of Genetic and Developmental Biology CAS,Shijiazhuang, Hebei 050021,China | | ZHANG Yu-ming | enter for Agricultural Resources Research Institute of Genetic and Developmental Biology CAS,Shijiazhuang, Hebei 050021,China | | DONG Wen-xu | enter for Agricultural Resources Research Institute of Genetic and Developmental Biology CAS,Shijiazhuang, Hebei 050021,China | | OUYANG Zhi-yun | Research Center for Eco-Environmental Sciences CAS,Beijing 100085,China |
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| Abstract: |
| A study was conducted to assess the leaching of nitrate-nitrogen in wheat-corn season in North China Plain during 2001～2002 year.Leaching losses were calculated from measured flux of water percolation, soil water NO-3-N concentrations extracted by suction cup.The results showed that in the 2001～2002 wheat season, there was serious NO-3-N leaching, the highest value was 110 kg/hm2 in N800 treatment, the lowest was 0 kg/hm2 at N200 treatment, at N400 treatment it was 22 kg/hm2.In the 2002 corn season there were also leaching of NO-3-N, the loss of NO-3-N were 2 kg/hm2 in N200 treatment, 16 kg/hm2 in N400 treatment, 50 kg/hm2 in N800 treatment. |
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