| 张葛,窦森,谢祖彬,孟繁荣,尹显宝.施用玉米秸秆生物质炭对水稻土黑碳数量和结构特征的影响[J].农业环境科学学报,2015,34(9):1769-1774. |
| 施用玉米秸秆生物质炭对水稻土黑碳数量和结构特征的影响 |
| Effect of Corn Stalk-Derived Biochar on Quantity and Structural Characteristics of Black Carbon in Paddy Soil |
| 投稿时间：2015-05-01 |
| DOI：10.11654/jaes.2015.09.020 |
| 中文关键词: 玉米秸秆生物质炭 表层水稻土 土壤黑碳 含量 结构特征 |
| 英文关键词: corn stalk-derived biochar surface paddy soil black carbon quantity structural characteristics |
| 基金项目:国家自然科学基金项目(No.41171188) |
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| 中文摘要: |
| 通过研究玉米秸秆生物质炭施用对土壤黑碳(BC)数量和结构的影响规律,比较施用生物质炭后不同年限间的差异,为阐明土壤BC在土壤固碳上的作用提供理论依据。选择化学氧化修改法进行土壤BC的提取,采用重铬酸钾外加热法测定土壤有机碳(SOC)含量,采用元素组成和红外光谱分析对土壤BC进行结构表征。研究结果表明:与对照(未施用玉米秸秆生物质炭)相比,施用玉米秸秆生物质炭后3年间各年土壤BC的含量分别增加177.0%、304.3%和434.2%,土壤BC占SOC的比例分别增加40.2%、143.5%和167.3%,说明玉米秸秆生物质炭有助于表层土壤BC长期稳定的积累,且随时间的延长而增加;与对照相比,施用玉米秸秆生物质炭后表层土壤BC的碳元素含量增加,缩合度和芳香性增加,氧化度和脂族性降低,且随玉米秸秆生物质炭施用年限的延长表现得更加明显。长期施用玉米秸秆生物质炭后使土壤BC的结构向着芳香性增加的方向发展,稳定性增强,因而对于土壤固碳是有利的。 |
| 英文摘要: |
| 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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