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| Effect of nitrogen-doped carbon nanoparticles(N-CNPs) on nitrogen runoff and leakage loss in paddy fields |
| Received:April 10, 2017 |
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| KeyWord:nitrogen-doped carbon nanoparticles;paddy;nitrogen fertilizer;runoff loss;leakage loss |
| Author Name | Affiliation | | HU Wei | Institute of Ecological Landscape Remediation and Design, Hunan University of Science and Technology, Xiangtan 411201, China | | XIANG Jian-hua | Institute of Ecological Landscape Remediation and Design, Hunan University of Science and Technology, Xiangtan 411201, China | | XIANG Yan-ci | Institute of Ecological Landscape Remediation and Design, Hunan University of Science and Technology, Xiangtan 411201, China | | ZHOU Lian | Institute of Ecological Landscape Remediation and Design, Hunan University of Science and Technology, Xiangtan 411201, China | | CHEN Yan | Institute of Ecological Landscape Remediation and Design, Hunan University of Science and Technology, Xiangtan 411201, China |
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| Abstract: |
| A field experiment was conducted from May to December 2016 in Changsha County,Hunan Province,China,to determine the effects of nitrogen-doped carbon nanoparticles (N-CNPs) on nitrogen loss in runoff and leakage in a paddy field.The results showed that the application of N-CNPs led to significantly lower runoff of NH4+-N,and leakage of NO3--N.Compared with the urea treatments,during the first natural rainfall runoff after base fertilizer had been applied,the 15‰N-CNPs treatments decreased NH4+-N concentrations by 30.33% in runoff and NO3--N concentrations by 27.22% in leakage water within seven days after fertilizer application.The results of monitoring for N loss with natural rainfall runoff indicated that,with 15‰N-CNPs application,total nitrogen (TN) loss from the paddy was 8.15 kg·hm-2 throughout the rice growing season.It accounted for 4.08% of urea-N applied.Furthermore,The loss amount of total nitrogen decreased by 20.02% under the condition of adding 15‰N-CNPs into urea compared with urea treatments.The results of monitoring for nitrogen loss with leakage indicated that,with 15‰N-CNPs application,leakage TN loss from the paddy was 16.59 kg·hm-2 throughout the rice growing season.It accounted for 8.30% of urea-N applied.Lastly,15‰N-CNPs application decreased by 34.73% compared with that of urea,and TN loss with runoff and leakage in 15‰N-CNPs treatments decreased by 5.67% and 15.70%,respectively,compared with 5% dicyandiamide treatments.Collectively,the application of N-CNPs can be effective in reducing nitrogen loss from paddy fields and promoting pollution control of agricultural non-point source pollution. |
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