Biochar application driven change in soil internal forces improves aggregate stability: Based on a two-year field study
文献类型:期刊论文
作者 | Hu, Feinan1,2,3; Xu, Chenyang2,3; Ma, Rentian2,3; Tu, Kun2,3; Yang, Jiayan2; Zhao, Shiwei1,2,3; Yang, Mingyi1,2; Zhang, Fengbao1,2 |
刊名 | GEODERMA |
出版日期 | 2021-12-01 |
卷号 | 403页码:10 |
ISSN号 | 0016-7061 |
关键词 | Biochar Surface charge Aggregate breakdown Particles interaction Hamaker constant |
DOI | 10.1016/j.geoderma.2021.115276 |
通讯作者 | Zhang, Fengbao(fbzhang@nwsuaf.edu.cn) |
英文摘要 | Biochar amendments are effective for stabilizing soil aggregates and improving the quality and fertility of soils. Soil internal forces (SIFs), including electrostatic, hydration, and van der Waals forces, can substantially affect aggregate stability; however, there has been relatively little focus on the effects of biochar addition on SIFs and their relation to aggregate stability. In this work, in order to quantitatively investigate the influence of biochar on aggregate stability, we collected soil samples with different biochar application rates (0, 2.5%, 5.5%, and 7.0%; w/w) after a two-year field experiment, and then used Na+-saturated soil aggregates (1-5 mm) to conduct our experiments. Our results demonstrated that after 2-year, specific surface area (SSA), soil organic carbon (SOM), cation exchange capacity (CEC), and surface charge density (sigma(0)) increased while soil pH slightly decreased with biochar application from 0% to 7%. Soil aggregate stability increased with the biochar application rate. Theoretical calculations indicated that forces of electrostatic repulsion and van der Waals attraction both increased in response to biochar incorporation, however the net pressure of SIFs decreased. Soil aggregate stability was well explained by the theoretical calculations. Biochar addition reduced the net pressure of SIFs and stabilized soil aggregates. Overall, the investigation by using the mono-cationic model system showed that SIFs played important roles in the aggregate stability and explained well the aggregate stability of amended soils. The findings of this work initiate the process of elucidating and quantifying the complex biochar-mineral interaction mechanism in soil systems. |
WOS关键词 | PARTICLE INTERACTION FORCES ; RICE HUSK BIOCHAR ; ORGANIC-MATTER ; SURFACE-CHARGE ; BLACK CARBON ; PHYSICAL-PROPERTIES ; SIZE DISTRIBUTION ; WATER INFILTRATION ; HAMAKER CONSTANTS ; PHOSPHORUS |
资助项目 | National Natural Science Foundation of China[41977024] ; National Natural Science Foundation of China[41701261] ; National Natural Science Foundation of China[41601236] ; Natural Science Foundation of Shaanxi Province[2018JQ4005] |
WOS研究方向 | Agriculture |
语种 | 英语 |
出版者 | ELSEVIER |
WOS记录号 | WOS:000671591200024 |
资助机构 | National Natural Science Foundation of China ; Natural Science Foundation of Shaanxi Province |
源URL | [http://ir.igsnrr.ac.cn/handle/311030/163821] |
专题 | 中国科学院地理科学与资源研究所 |
通讯作者 | Zhang, Fengbao |
作者单位 | 1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 2.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China 3.Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China |
推荐引用方式 GB/T 7714 | Hu, Feinan,Xu, Chenyang,Ma, Rentian,et al. Biochar application driven change in soil internal forces improves aggregate stability: Based on a two-year field study[J]. GEODERMA,2021,403:10. |
APA | Hu, Feinan.,Xu, Chenyang.,Ma, Rentian.,Tu, Kun.,Yang, Jiayan.,...&Zhang, Fengbao.(2021).Biochar application driven change in soil internal forces improves aggregate stability: Based on a two-year field study.GEODERMA,403,10. |
MLA | Hu, Feinan,et al."Biochar application driven change in soil internal forces improves aggregate stability: Based on a two-year field study".GEODERMA 403(2021):10. |
入库方式: OAI收割
来源:地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。