The Effects of Controlled Drainage on N Concentration and Loss in Paddy Field
To relieve the situation of the agricultural nonpoint pollution (NPS) in south and east China, paddy field controlled drainage (PFCD) is applied as an important and efficient approach to agricultural water management. A series of PFCD tests at four major growth stages of rice were conducted by use o...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2016/1073691 |
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| author | Bin Lu Guangcheng Shao Shuang’en Yu Shiqiang Wu Xinghua Xie |
| author_facet | Bin Lu Guangcheng Shao Shuang’en Yu Shiqiang Wu Xinghua Xie |
| author_sort | Bin Lu |
| collection | DOAJ |
| description | To relieve the situation of the agricultural nonpoint pollution (NPS) in south and east China, paddy field controlled drainage (PFCD) is applied as an important and efficient approach to agricultural water management. A series of PFCD tests at four major growth stages of rice were conducted by use of 18 lysimeters. Concentration of ammonia nitrogen (NH4+-N) and nitrate nitrogen (NO3--N) in surface and subsurface paddy water was observed. The results indicated that the concentration of NH4+-N and NO3--N in paddy water declined with the persistence of a waterlogged condition. Compared to traditional drainage, PFCD reduced N loss in surface water by 95.6%, 78.7%, 59.6%, and 87.4% at the stage of tillering, jointing-booting, heading-flowering, and milking, respectively. It should be noted that loads of N losses in surface water increased on the fourth day after waterlogging at the jointing-booting and milking stage, and surface water exhibited higher N concentration on the first day after waterlogging at each stage. Therefore, paddy field surface water drainage should be avoided in these periods. |
| format | Article |
| id | doaj-art-524241110f1847498b75482534532256 |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-524241110f1847498b754825345322562025-02-03T06:14:12ZengWileyJournal of Chemistry2090-90632090-90712016-01-01201610.1155/2016/10736911073691The Effects of Controlled Drainage on N Concentration and Loss in Paddy FieldBin Lu0Guangcheng Shao1Shuang’en Yu2Shiqiang Wu3Xinghua Xie4State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, ChinaEfficient Irrigation and Drainage and Environment of Agriculture Water and Soil, South Area Key Laboratory, the Ministry of Education, College of Water Conservancy and Hydropower, Hohai University, Nanjing 210098, ChinaEfficient Irrigation and Drainage and Environment of Agriculture Water and Soil, South Area Key Laboratory, the Ministry of Education, College of Water Conservancy and Hydropower, Hohai University, Nanjing 210098, ChinaState Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, ChinaState Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, ChinaTo relieve the situation of the agricultural nonpoint pollution (NPS) in south and east China, paddy field controlled drainage (PFCD) is applied as an important and efficient approach to agricultural water management. A series of PFCD tests at four major growth stages of rice were conducted by use of 18 lysimeters. Concentration of ammonia nitrogen (NH4+-N) and nitrate nitrogen (NO3--N) in surface and subsurface paddy water was observed. The results indicated that the concentration of NH4+-N and NO3--N in paddy water declined with the persistence of a waterlogged condition. Compared to traditional drainage, PFCD reduced N loss in surface water by 95.6%, 78.7%, 59.6%, and 87.4% at the stage of tillering, jointing-booting, heading-flowering, and milking, respectively. It should be noted that loads of N losses in surface water increased on the fourth day after waterlogging at the jointing-booting and milking stage, and surface water exhibited higher N concentration on the first day after waterlogging at each stage. Therefore, paddy field surface water drainage should be avoided in these periods.http://dx.doi.org/10.1155/2016/1073691 |
| spellingShingle | Bin Lu Guangcheng Shao Shuang’en Yu Shiqiang Wu Xinghua Xie The Effects of Controlled Drainage on N Concentration and Loss in Paddy Field Journal of Chemistry |
| title | The Effects of Controlled Drainage on N Concentration and Loss in Paddy Field |
| title_full | The Effects of Controlled Drainage on N Concentration and Loss in Paddy Field |
| title_fullStr | The Effects of Controlled Drainage on N Concentration and Loss in Paddy Field |
| title_full_unstemmed | The Effects of Controlled Drainage on N Concentration and Loss in Paddy Field |
| title_short | The Effects of Controlled Drainage on N Concentration and Loss in Paddy Field |
| title_sort | effects of controlled drainage on n concentration and loss in paddy field |
| url | http://dx.doi.org/10.1155/2016/1073691 |
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