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| Effect of Corn Stalk-Derived Biochar on Quantity and Structural Characteristics of Black Carbon in Paddy Soil |
| Received:May 01, 2015 |
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| KeyWord:corn stalk-derived biochar;surface paddy soil;black carbon;quantity;structural characteristics |
| Author Name | Affiliation | E-mail | | ZHANG Ge | College of Resources and Environment, Jilin Agricultural University, Changchun 130118, China | | | DOU Sen | College of Resources and Environment, Jilin Agricultural University, Changchun 130118, China | dousen@tom.com | | XIE Zu-bin | State Key Laboratory of Soil and Sustainable Agriculture(Institute of Soil Science, Chinese Academy of Sciences), Nanjing 210008, China | | | MENG Fan-rong | College of Resources and Environment, Jilin Agricultural University, Changchun 130118, China | | | YIN Xian-bao | College of Resources and Environment, Jilin Agricultural University, Changchun 130118, China | |
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| Abstract: |
| Biochar can improve soil fertility and enhance soil carbon sequestration. In order to understand the contribution of biochar to soil carbon sequestration, the quantity and structural characteristics of black carbon(BC) were studied in soil applied with corn stalk-derived biochar for different durations under rice and wheat rotation. Compared with CK(no corn stalk-derived biochar), the content of BC in surface soil increased by 177.0%, 304.3% and 434.2% in the 1st, 2nd, and 3rd year of biochar application, respectively, resulting in an increase in BC/SOC ratio by 40.2%, 143.5%, and 167.3%. This indicated that applying corn stalk-derived biochar would help the accumulation of BC in surface soil over time. Furthermore, the biochar applications increased the carbon content, condensation degree and aromatic degree of BC in surface soil, while decreased the oxidation degree and aliphatic degree as compared to CK. Such effects were more obvious in longer duration of biochar application. These findings suggest that long-term application of biochar would improve aromaticity and stability of BC, and enhance soil carbon sequestration. |
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