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| Effects of biochar on NH3 volatilization, N2O emission and nitrogen fertilizer use efficiency in brown soil |
| Received:November 15, 2015 |
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| KeyWord:biochar;NH3 volatilization;N2O emission;N fertilizer use efficiency |
| Author Name | Affiliation | E-mail | | CHENG Xiao-yi | Shenyang Agricultural University, Biochar Engineering Technology Research Center of Liaoning Province, Shenyang 110866, China | | | LIU Xiao-lin | Shenyang Agricultural University, Biochar Engineering Technology Research Center of Liaoning Province, Shenyang 110866, China | | | MENG Jun | Shenyang Agricultural University, Biochar Engineering Technology Research Center of Liaoning Province, Shenyang 110866, China | | | LAN Yu | Shenyang Agricultural University, Biochar Engineering Technology Research Center of Liaoning Province, Shenyang 110866, China | | | LIU Zun-qi | Shenyang Agricultural University, Biochar Engineering Technology Research Center of Liaoning Province, Shenyang 110866, China | | | YANG Xu | Shenyang Agricultural University, Biochar Engineering Technology Research Center of Liaoning Province, Shenyang 110866, China | | | HUANG Yu-wei | Shenyang Agricultural University, Biochar Engineering Technology Research Center of Liaoning Province, Shenyang 110866, China | | | CAO Ting | Shenyang Agricultural University, Biochar Engineering Technology Research Center of Liaoning Province, Shenyang 110866, China | | | CHEN Wen-fu | Shenyang Agricultural University, Biochar Engineering Technology Research Center of Liaoning Province, Shenyang 110866, China | wfchen0512@126.com |
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| Abstract: |
| A field experiment was conducted to investigate the effects of biochar on NH3 volatilization, N2O emission, and N fertilizer use efficiency in brown soil by acid absorption and static chamber method. Four treatments, including no N fertilizer(CK), N fertilizer(NB0), N fertilizer with 20 t·hm-2 biochar(NB20) and N fertilizer with 40 t·hm-2 biochar(NB40), were designed. Results showed that:Compared with NB0, NH3 volatilization in NB20 and NB40 decreased by 24.07% and 37.62%, respectively, while N2O emission in these two treatments reduced by 21.67%and 19.57%, with no significant difference between them; Soil bulk density was decreased, but soil pH, total nitrogen and organic carbon content were increased in NB20 and NB40; A significant positive correlation existed between NH3 volatilization and soil bulk density or ammonium nitrogen concentration, and between N2O emission and soil bulk density, whereas a negative correlation between NH3 volatilization and organic carbon content, and between N2O emission and nitrate-nitrogen concentration or organic carbon content; NB20 increased N fertilizer use efficiency and maize yield by 6.07%, while NB40 decreased the yield by 13.88%, as compared with NB0. |
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