中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 烟台海岸带研究所
  3. 中国科学院烟台海岸带研究所
  4. 中科院海岸带环境过程与生态修复重点实验室
Pore connectivity and anisotropy affect carbon mineralization via extracellular enzymes in > 2 mm aggregates under conservation tillage of Mollisols

文献类型：期刊论文

作者Xiao, Yang5; Zhou, Meng2,5; Liu, Xiaobing5; Zhang, Xingyi5; Xiao, Leilei4; Liu, Jian3; Cruse, Richard M.1
刊名SOIL & TILLAGE RESEARCH
出版日期2024-12-01
卷号244页码:12
关键词Conservation tillage Computed tomography Pore shape Carbon sequestration beta-glucosidase beta-xylosidase
ISSN号0167-1987
DOI10.1016/j.still.2024.106253
通讯作者Zhou, Meng(zhoumeng@iga.ac.cn)
英文摘要Soil aggregates, which are the basic units of soil structure, play an important role in the carbon cycle of ecosystems. The pore characteristics of aggregates influence soil organic carbon sequestration. However, studies on SOC mechanisms in aggregates have been limited to Mollisols. This study was conducted as a long-term experiment established in 2004 with a corn-soybean rotation in Mollisols. There are three treatments, including rotary tillage without straw return (conventional tillage, CT), subsoiling without straw return (reduced tillage, RT), and no tillage with straw return (NT). The soil pore size distribution, shape parameters, extracellular enzymes activity, and carbon mineralization were measured. The results showed that 15-year no tillage and reduced tillage increased the total porosity and proportion of larger pores, but significantly decreased the proportion of smaller pores in situ soil columns. Conventional tillage exhibited the most complex pores because of the highest pore fractal dimension (2.75-2.90), anisotropy (0.366-0.516), and the lowest sphericity (5.1-28.7). As for the soil columns filled with > 2 mm aggregates, reduced tillage significantly increased the pore connectivity by 3.02-3.62 %, whereas no tillage had no effect. The structural equation modelling indicated that in soil columns filled with > 2 mm aggregates, pore shape parameters, particularly connectivity and anisotropy, positively influenced the activities of beta-glucosidase and beta-xylosidase directly, and positively affected soil carbon mineralization by influencing extracellular enzymes activity indirectly. The findings emphasize the importance of pore shape parameters effect on soil carbon sequestration, and will be helpful in comprehending the microscopic mechanisms of soil carbon sequestration in > 2 mm aggregates.
WOS关键词SOIL ORGANIC-MATTER ; MANAGEMENT ; SIZE ; STABILITY ; SEQUESTRATION ; FRACTIONS ; EROSION ; RATES ; BIOTA ; BONE
WOS研究方向Agriculture
语种英语
WOS记录号WOS:001289972600001
资助机构Jilin Province in China ; Strategic Priority Research Program of the Chinese Academy of Sciences
源URL[http://ir.yic.ac.cn/handle/133337/35791]  
专题烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
烟台海岸带研究所_近岸生态与环境实验室
通讯作者Zhou, Meng
作者单位1.Iowa State Univ, Dept Agron, Ames, IA USA
2.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Harbin 151800, Peoples R China
3.Dezhou Univ, Inst Biophys, Shandong Key Lab Biophys, Dezhou 253023, Peoples R China
4.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China
5.Chinese Acad Sci, Northeast Inst Geog & Agroecol, State Key Lab Black Soils Conservat & Utilizat, Harbin 150081, Peoples R China
推荐引用方式
GB/T 7714		 Xiao, Yang,Zhou, Meng,Liu, Xiaobing,et al. Pore connectivity and anisotropy affect carbon mineralization via extracellular enzymes in > 2 mm aggregates under conservation tillage of Mollisols[J]. SOIL & TILLAGE RESEARCH,2024,244:12.
APA Xiao, Yang.,Zhou, Meng.,Liu, Xiaobing.,Zhang, Xingyi.,Xiao, Leilei.,...&Cruse, Richard M..(2024).Pore connectivity and anisotropy affect carbon mineralization via extracellular enzymes in > 2 mm aggregates under conservation tillage of Mollisols.SOIL & TILLAGE RESEARCH,244,12.
MLA Xiao, Yang,et al."Pore connectivity and anisotropy affect carbon mineralization via extracellular enzymes in > 2 mm aggregates under conservation tillage of Mollisols".SOIL & TILLAGE RESEARCH 244(2024):12.

入库方式： OAI收割

来源：烟台海岸带研究所

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。