您好，欢迎访问江苏省农业科学院 机构知识库！
江苏省农业科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Straw-derived biochar mitigates CO2 emission through changes in soil pore structure in a wheat-rice rotation system

文献类型： 外文期刊

作者： Fan, Ruqin 1 ; Zhang, Baohua 3 ; Li, Jiangye 1 ; Zhang, Zhenhua 2 ; Liang, Aizhen 4 ;

作者机构： 1.Zhongkai Univ Agr & Engn, Coll Environm Sci & Engn, Guangzhou 510225, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Nanjing 210014, Peoples R China

3.Liaocheng Univ, Sch Environm & Planning, Liaocheng 252000, Shandong, Peoples R China

4.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Key Lab Mollisols Agroecol, Changchun 130102, Peoples R China

关键词： Biochar; CO2 emission; Straw application; Soil organic carbon; Soil pore system; X-ray Cr

期刊名称：CHEMOSPHERE （ 影响因子：7.086； 五年影响因子：6.956 ）

ISSN： 0045-6535

年卷期： 2020 年 243 卷

页码：

收录情况： SCI

摘要： To better understand the relationships between soil pore structure features and soil CO2 emission and soil organic carbon (SOC) sequestration following different straw return modes, undisturbed soil cores (0 -5 cm and 5-10 cm) were collected from a rice-wheat rotation system under 4 straw return treatments as (1) no straw return (CK), (2) straw direct return (DR), (3) straw biochar return (BR); (4) straw-pig manure fermentation return (FR) for six years. Pore structure parameters including pore size distribution, porosity, connectivity, anisotropy and fractal dimension (FD) were determined using X-ray computer tomography. Soil CO2 flux and concentrations of SOC, readily oxidable carbon and nutrients were also measured. The results showed that BR and FR had significantly higher SOC concentration than DR and CK. Porosity and number of >500 sm and 500-100 mu m macropores, FD and connectivity were significantly highest under FR and was lowest under BR. FR and DR produced 28.1%-32.4% higher C-CO2 than CK and BR in wheat growing season, and 9.80%-16.9% higher in rice season. Soil CO2 emission and C concentrations were significantly related to soil pore structure parameters. The CO2 emission was most significantly related to number of >500 mu m pores and FD, indicating that poorly developed pore structure under BR hindered the production and diffusion of CO2 from soil. These results enhanced our understanding of the relationship between soil pore structure and CO2 emission following biochar application, and provided evidence for decision making process in choosing proper straw managements to promote SOC sequestration and reduce CO2 emission. (C) 2019 Elsevier Ltd. All rights reserved.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：江苏省农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台