Soil aggregate microstructure and microbial community structure mediate soil organic carbon accumulation: Evidence from one-year field experiment
文献类型: 外文期刊
作者: Zhang, Weijun 1 ; Munkholm, Lars J. 2 ; Liu, Xu 1 ; An, Tingting 1 ; Xu, Yingde 1 ; Ge, Zhuang 1 ; Xie, Ninghui 1 ; Li, Aimeng 1 ; Dong, Yuqi 1 ; Peng, Chang 3 ; Li, Shuangyi 1 ; Wang, Jingkuan 1 ;
作者机构: 1.Shenyang Agr Univ, Coll Land & Environm, Natl Engn Res Ctr Efficient Utilizat Soil & Fertil, Key Lab Arable Land Conservat Northeast China,Mini, Shenyang 110866, Peoples R China
2.Aarhus Univ, Dept Agroecol, POB 50, DK-8830 Tjele, Denmark
3.Jilin Acad Agr Sci, Ctr Agr Environm & Resources, Changchun 130033, Peoples R China
4.Shenyang Agr Univ, Coll Land & Environm, 120 Dongling Rd, Shenyang 110866, Peoples R China
关键词: Aggregate pore structure; Particulate organic carbon; Subsoiling tillage; Microbial community structure; SR-?CT
期刊名称:GEODERMA ( 影响因子:6.1; 五年影响因子:7.0 )
ISSN: 0016-7061
年卷期: 2023 年 430 卷
页码:
收录情况: SCI
摘要: Soil organic carbon (SOC) accumulation is easily susceptible to tillage managements, which strongly affect soil structure and microbial community structure. Subsoiling is developed for mitigating soil compaction and thus improving soil structure. Coupled with straw residue incorporation, it is expected not only to enhance this improvement but also to promote organic carbon (C) storage in soil. However, how subsoiling tillage manage-ments change soil aggregate microstructure, microbial community structure and SOC fractions, and how soil aggregate microstructure and microbial community structure affect SOC in the topsoil and subsoil layers are equally unknown. An in-situ incubation field experiment was conducted in a Mollisol in northeastern China and included conventional tillage (CT), subsoiling tillage (ST) and subsoiling tillage with straw residue incorporation (ST + S). The methods of synchrotron-based X-ray micro-computed tomography scanning, phospholipid fatty acid and SOC density fractionation were used to analyze aggregate pore characteristics, microbial community structure and SOC fractions, respectively. The results showed that both ST and especially ST + S not only improved soil aggregate microstructure but also enhanced microbial biomass and then favored SOC accrual in the topsoil (0-20 cm). In the subsoil (20-35 cm), ST + S exerted similar positive effects as those in the topsoil. However, ST only improved soil aggregate microstructure but decreased microbial community biomass and SOC in the subsoil. Moreover, soil aggregate structure characteristics explained (solely explained 6 % in the topsoil and 12 % in the subsoil, respectively) a smaller part of the variation in SOC within aggregates than soil microbial characteristics did (solely explained 15 % in the topsoil and 25 % in the subsoil, respectively). Specifically, bacteria explained 26 % and 66 % of the variation in SOC within aggregates in the topsoil and subsoil, respectively. The porosity of macropores (>100 mu m) also explained 25 % of the variation in SOC within ag-gregates in the topsoil, whereas the porosity of micropores (<30 mu m) explained more variation (12 %) than that of macropores (3 %) in the subsoil. Notably, the substantially different interaction mechanism-processed of pore characteristics, microbial structure and SOC between topsoil and subsoil was probably traceable for the variation in the influx of organic C, pore size distribution and microbial adaptability in soil layers. These results would provide new insights on tillage managements strategies for improving soil conditions in terms of optimizing soil aggregate microstructure-microbes-SOC interactions in the topsoil and subsoil layers.
- 相关文献
作者其他论文 更多>>
-
Changes in soil fertility under partial organic substitution of chemical fertilizer: a 33-year trial
作者:Zhu, Ping;Zhang, Lei;Gao, Jichao;Zhang, Xiuzhi;Zhu, Ping;Gao, Hongjun;Li, Qiang;Peng, Chang;Jiao, Yunfei;Luo, Jiafa;Lindsey, Stuart;Zhang, Lei;Xu, Lingying;Qiu, Weiwen
关键词:soil fertility; soil properties; soil organic carbon; soil nutrients
-
Different behaviors in nitrogen leaching between soil types following the substitution of synthetic fertilizers by manure
作者:Du, Xinzhong;Li, Jungai;Wang, Hongyuan;Bashir, Muhammad Amjad;Wang, Zhen;Zhai, Limei;Liu, Hongbin;Zhang, Yitao;Peng, Chang;Bashir, Muhammad Amjad;Di, Hong J.
关键词:Maize yield; Manure substitution; N leaching; Non-point source pollution
-
Subsoiling tillage with straw incorporation improves soil microbial community characteristics in the whole cultivated layers: A one-year study
作者:Liu, Xu;Zhang, Weijun;Li, Shuangyi;An, Tingting;Xu, Yingde;Ge, Zhuang;Xie, Ninghui;Wang, Jingkuan;Peng, Chang
关键词:Subsoiling tillage; Straw incorporation; Microbial community characteristics
-
The Phosphorus Availability in Mollisol Is Determined by Inorganic Phosphorus Fraction under Long-Term Different Phosphorus Fertilization Regimes
作者:Wang, Qiong;Zhang, Naiyu;Chen, Yanhua;Qin, Zhenhan;Jin, Yuwen;Zhang, Shuxiang;Wang, Qiong;Colinet, Gilles;Chen, Yanhua;Zhu, Ping;Peng, Chang;Liu, Jin
关键词:P availability; P speciation; molecular speciation; solution NMR; P-XANES
-
Profound Change in Soil Microbial Assembly Process and Co-occurrence Pattern in Co-inoculation of Bradyrhizobium japonicum 5038 and Bacillus aryabhattai MB35-5 on Soybean
作者:Zhao, Yubin;Guan, Dawei;Xing, Pengfei;Jiang, Xin;Ma, Mingchao;Cao, Fengming;Li, Li;Li, Jun;Liu, Xu;Gao, Gui-Feng;Meng, Fangang;Liu, Bingqiang
关键词:Rhizobium; Bacillus; co-inoculation; microbial assembly process; co-occurrence pattern
-
Dynamic Changes of Humic Acids in Chicken Manure Composting
作者:Han, Xing;Liu, Shichao;Ma, Xiulan;Wang, Yujun;Liu, Shichao;Xie, Zhonglei;Peng, Chang
关键词:Keywords; composting of chicken manure; HA; element composition; spectral characteristics; thermal; properties
-
Cellulose derived from corn straw for the efficient adsorption of Cd(II) from water
作者:Li, Bangwei;Guo, Mengying;Chen, Tianya;Ma, Xiulan;Wang, Yujun;Li, Bangwei;Guo, Mengying;Chen, Tianya;Ma, Xiulan;Wang, Yujun;Xie, Zhonglei;Xie, Zhonglei;Peng, Chang
关键词:Corn straw cellulose; Cellulose-modified; Water treatment; Cd(II); Adsorption; characteristics