| Effects of biochar and wood vinegar on N2O and NH3 emissions from moderately saline soil |
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| DOI：10.7606/j.issn.1000-7601.2023.02.26 |
| Key Words: biochar wood vinegar moderately saline soil gaseous nitrogen loss global warming potential |
| Author Name | Affiliation | | YU Beibei | College of Resources and Environment, Gansu Agricultural University, Lanzhou, Gansu 730070, China
Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang 310021, China | | HE Lili | Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang 310021, China
Engineering Research Center of Biochar of Zhejiang Province, Hangzhou,Zhejiang 310021, China | | LIU Yuxue | Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang 310021, China
Engineering Research Center of Biochar of Zhejiang Province, Hangzhou,Zhejiang 310021, China | | QIN Jingjing | Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang 310021, China | | WANG Kun | Sino\|American International College, Zhuhai College, Beijing Institute of technology, Zhuhai, Guangdong 519088, China
School of business, City University of Macau, Macau 999078, China | | YU Dandan | Liaoning Jinghua Engineering Consulting Co., Ltd., Shenyang , Liaoning 110029, China | | LIU Shuying | College of Resources and Environment, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | YANG Shengmao | Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang 310021, China
Engineering Research Center of Biochar of Zhejiang Province, Hangzhou,Zhejiang 310021, China |
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| Abstract: |
| To explore the effects of biochar and wood vinegar on the nitrification process of urea nitrogen, N2O emission and NH3 volatilization of saline soil, five treatments of control (CK)with no urea, urea (N), urea + biochar (N+B), urea + wood vinegar (N+WV) and urea+biochar+wood vinegar (N+B+WV) were set up to carry out indoor aerobic culture experiments. The results showed that: (1) The apparent nitrification rate of each treatment showed an upward trend 14 days before culture. Compared with other treatments, the content of ammonium nitrogen in N+B+WV treatment was the highest, the apparent nitrification rate was the lowest, and the apparent nitrification rate was significantly higher in the later stage of culture. At the end of culture, the amoA gene abundance of ammonia oxidizing bacteria (AOB) in N+B+WV treatment was significantly higher than that in N treatment, with an increase of 76.5%, and the amoA gene abundance of ammonia oxidizing archaea (AOA) was significantly lower than that in CK, with a decrease of 51.5%. (2) Compared with CK, the cumulative emissions of N2O and NH3 in N treatment increased significantly. Compared with N treatment, the cumulative emission of N2O in N+WV, N+B and N+B+WV treatment increased by 10.0%, decreased by 9.5% and 18.2% respectively, the abundance of nitrous oxide reductase nosZ gene decreased by 9.3%，26.1% and 37.7% respectively, and the cumulative volatilization of NH3 decreased by 30.5%, 28.9% and 49.0% respectively. (3) Comprehensive calculating the greenhouse effect potential caused by N2O and NH3 emissions of each treatment found the N+B+WV treatment reduced the greenhouse effect potential by 20.0%, and the emission reduction effect was the most significant when compared with N treatment. In conclusion, the combined application of biochar and wood vinegar in moderately saline soil area effectively reduced N2O and NH3 emissions in soil, soil inorganic nitrogen loss and greenhouse effect potential. |
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