中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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
DOI10.1016/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

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