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| Nitrification-urease inhibitor-biochar-controlled nitrogen leaching with different biogas slurry irrigation intensities |
| Received:April 25, 2020 |
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| KeyWord:irrigation intensity;nitrification inhibitors;urease inhibitors;biochar;biogas slurry |
| Author Name | Affiliation | E-mail | | YANG Han-bo | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
College of Grass and Environmental Sciences, Xinjiang Agricultural University, Urumqi 830000, China | | | LUO Yan-li | College of Grass and Environmental Sciences, Xinjiang Agricultural University, Urumqi 830000, China | | | ZHAO Di | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | LAI Rui-te | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | ZHANG Ke-qiang | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | LIANG Jun-feng | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | SHEN Feng-ju | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | WANG Feng | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | wangfeng_530@163.com |
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| Abstract: |
| To investigate the effect of nitrapyrin+NBPT+biochar on nitrogen leaching under different biogas slurry irrigation intensities, this study used a soil column simulated leaching test. The ammonium nitrogen(NH4+-N), nitrate nitrogen(NO3--N), and total nitrogen(TN) contents in the soil leaching solution and the contents of NH4+-N and NO3--N in the soil were monitored. The results showed that the nitrapyrin+NBPT+biochar reduced the concentrations of NH4+-N, NO3--N, and TN in the soil leaching solution by 25.3%, 53.6%, and 38.2%, respectively, and reduced the cumulative leaching loss by 34.5%, 61.0%, 38.6%, respectively; and after the irrigation intensity increased by 30.0%, 60.0%, and 100.0%, the technology still reduced the NO3--N leaching volume by 59.3%, 55.1%, and 46.6%, respectively, and the TN leaching volume by 31.7%, 27.1%, and 15.4%, respectively. The soil NH4+-N content increased by 86.5%, 60.0%, and 44.5%, respectively. In this study, the greater the intensity of biogas slurry irrigation, the greater the risk of soil nitrogen leaching. However, the nitrapyrin+NBPT+biochar significantly inhibited nitrogen leaching and still had an effect within a certain range of increasing irrigation. |
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