Soil organic and inorganic carbon sequestration by consecutive biochar application: Results from a decade field experiment

文献类型： 外文期刊

第一作者： Shi, Siwei

作者： Shi, Siwei;Zhang, Qingzhong;Lou, Yilai;Du, Zhangliu;Wang, Qian;Song, Jiqing;Shi, Siwei;Hu, Ning;Wang, Yidong;Gunina, Anna

作者机构：

关键词： aggregates; biochar; long-term experiment; soil inorganic carbon; soil organic carbon fractions

期刊名称：SOIL USE AND MANAGEMENT （ 影响因子：2.95； 五年影响因子：3.109 ）

ISSN： 0266-0032

年卷期：

页码：

收录情况： SCI

摘要： Biochar addition can expand soil organic carbon (SOC) stock and has potential ability in mitigating climate change. Also, some incubation experiments have shown that biochar can increase soil inorganic carbon (SIC) contents. However, there is no direct evidence for this from the field experiment. In order to make up the sparseness of available data resulting from the long-term effect of biochar amendment on soil carbon fractions, here we detected the contents and stocks of the bulk SIC and SOC fractions based on a 10-year field experiment of consecutive biochar application in Shandong Province, China. There are three biochar treatments as no-biochar (control), and biochar application at 4.5 Mg ha(-1) year(-1)(B4.5) and 9.0 Mg ha(-1) year(-1)(B9.0), respectively. The results showed that biochar application significantly enhanced SIC content (3.2%-24.3%), >53 mu m particulate organic carbon content (POC, 38.2%-166.2%) and total soil organic carbon content (15.8%-82.2%), compared with the no-biochar control. However, <53 mu m silt-clay-associated organic carbon (SCOC) content was significantly decreased (14%-27%) under the B9.0 treatment. Our study provides the direct field evidence that SIC contributed to carbon sequestration after the biochar application, and indicates that the applied biochar was allocated mainly in POC fraction. Further, the decreased SCOC and increased microbial biomass carbon contents observed in field suggest that the biochar application might exert a positive priming effect on native soil organic carbon.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序