土壤学报2024，Vol.61Issue(5)：1212-1223,12.DOI:10.11766/trxb202304070130
生物质炭改良盐渍土CT孔隙图像的多重分形与相对熵特征
The Multifractal and Relative Entropy Characteristics of Pore Structure of CT Images in Biochar-amended Saline Soils
摘要
Abstract
[Objective]Soil structure is the key to understanding physical,chemical,and biological processes that play a vital role in biodiversity and agricultural productivity.However,due to the mutual influence and simultaneous progress of these process,soil structure evolution has become irregular,unstable,and highly complex.With the development of computer technology on CT scanning images,different scaling and descriptive statistical analysis allow for a better study of soil pore structure or architecture.[Method]Inthis study,the saline/sodic soil in the coastal reclamation area of JiangsuProvince was taken as the object of investigation.Based on multifractal and relative entropy theory,combined with Micro-CT technology,the scaling features of the pore structure of biochar-amended saline soil were revealed.[Result]In this study,the surface soils(0-20 cm)were amended by thoroughly mixing with biochar atthree application rates(0%,2%and 5%by mass of soil)in a completely randomized design.This experiment lasted for four years from 2017 to 2020.To reveal the scaling characteristics of CT pores,two methods were applied:multifractal analysis(MFA)and relative entropy(E).The results showed that different theoretical methods should be used to analyze the complex scaling behavior of soil pores.The multifractal method was suitable for grey images,while the relative entropy method was suitable for binary images.The pore complexity of all treatments increased from one year to the next.Also,the addition of biochar accelerated the developments of soil pore structure and induced a faster rate of increase in pore complexity.Among different biochar treatments,the pore complexity of 2%biochar treatment was the highest(Δα=0.061,RangeΔE=0.436)and the improvement effect was the best.The addition of high biochar(5%biochar treatment)reduced the pore complexity(Δα=0.045,RangeΔE=0.531),reducing the improvement effect of biochar.[Conclusion]This study can provide a theoretical basis for the use of biochar to improve pore structure from a microscopic point of view.关键词
滨海盐渍土/生物质炭/Micro-CT扫描/多重分形/相对熵Key words
Coastal saline soil/Biochar/Micro-CT scanning/Multifractal/Relative entropy分类
农业科技引用本文复制引用
孙枭沁,佘冬立..生物质炭改良盐渍土CT孔隙图像的多重分形与相对熵特征[J].土壤学报,2024,61(5):1212-1223,12.基金项目
国家自然科学基金项目(41825021,42177393)、江苏省自然资源科技项目(2022046)、江苏省水利科技项目(2021062)共同资助Supported by the National Natural Science Foundation of China(Nos.41825021 and 42177393),the Natural Resources Science and Technology Project of Jiangsu Province(No.2022046),and the Water Science and Technology Project of Jiangsu Province(No.2021062). （41825021,42177393）
