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| Effects of combined application of nitrification/urease inhibitor and biochar on soil nitrogen leaching and quality of Brassica campestris after digested slurry drip irrigation |
| Received:September 12, 2019 |
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| KeyWord:digested slurry;nitrification inhibitors;urease inhibitors;biochar;nitrate leaching |
| Author Name | Affiliation | E-mail | | LAI Rui-te | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | YANG Han-bo | 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 | | | SHEN Feng-ju | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | GAO Wen-xuan | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | ZHAO Di | 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 | liangjunfeng2008@126.com | | 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 explore the effects of the combined application of nitrification/urease inhibitors, surfactants, and biochar on different forms of nitrogen leaching and plant quality in Brassica campestris after digested slurry drip irrigation, a soil column culture experiment was conducted with different combinations of application. A total of six treatments were performed with combinations of inhibitor, surfactant, and biomass carbon:single application of digested slurry(CK), digested slurry + surfactant + biochar(YB), digested slurry + dicyandiamide + hydroquinone(DH), digested slurry + dicyandiamide + hydroquinone + surfactant(DHY), digested slurry + dicyandiamide + hydroquinone + biochar(DHB), and digested slurry + dicyandiamide + hydroquinone + biochar + surfactant(DHBY). The amount of soil nitrate leaching showed the trend of CK > YB > DH > DHY > DHBY > DHB and the nitrate content in Brassica campestris showed the trend of CK > YB > DHY > DH > DHBY > DHB. Compared with CK, DHB treatment reduced soil nitrate leaching by 27.62% and the fresh weight of Brassica campestris was increased 1.42-fold and plant height by 1.29-fold; the nitrate content in Brassica campestris was decreased by 32.25%. It is suggested that the combination of nitrification/urease inhibitor and biochar is more effective in preventing and controlling soil nitrate leaching, reducing nitrate accumulation in crops, and significantly improving crop quality. |
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